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Researchers warn that residential proxies used to route malicious traffic are a big problem for IP reputation systems, as there is no clear distinction between attackers and legitimate users. [...]

Threat actors are exploiting vacant homes as "drop addresses" to intercept mail and enable fraud. Flare shows how postal services and fake identities are abused to turn mail into a fraud vector. [...]

Two vulnerabilities in Progress ShareFile, an enterprise-grade secure file transfer solution, can be chained to enable unauthenticated file exfiltration from affected environments. [...]

Stryker Corporation, one of the world's leading medical technology companies, says it's fully operational three weeks after many of its systems were wiped out in a cyberattack claimed by the Iranian-linked Handala hacktivist group. [...]

Executive Overview Advanced persistent threats (APTs) are constantly and consistently changing tactics as network defenders plug holes in defenses. Static indicators of compromise (IoCs) for the BPFDoor have been widely deployed, forcing threat actors to get creative in their use of this particular strain of malware. What they came up with is ingenious. New research from Rapid7 Labs has uncovered undocumented features leading to the discovery of 7 new BPFDoor variants: a stealthy kernel-level backdoor that uses Berkeley Packet Filters (BPFs) to inspect traffic from right inside the operating system kernel. This essentially creates a silent trapdoor that can be activated by a threat actor once a “magic packet” is tunneled via stateless protocols. The malware is then able to perfectly blend into the target environment, establishing nearly undetectable persistence in global telecom infrastructure. Our latest research continues the narrative established in our blog BPFdoor in Telecom Networks: Sleeper Cells in the Backbone . It involves the analysis of nearly 300 samples and identifies two primary new variants: httpShell and icmpShell. These variants represent a significant leap in operational security, utilizing stateless C2 routing and ICMP relay to bypass multi-million dollar security stacks. Rapid7 detection and response strategy: Rapid7 is actively tracking these variants to ensure our customers remain protected against this evolving threat through the following: Intelligence Hub: Customers with access to Rapid7’s Intelligence Hub are receiving continuous updates, including the latest intelligence, YARA rules, and Suricata detection rulesets. Actionable guidance: We have released a specialized triage script ( rapid7_bpfdoor_check.sh ) designed to identify both legacy and modern BPFDoor variants by inspecting active BPF filters and validating masqueraded processes. Detection engineering: Our detection strategy focuses on structural header anomalies, such as hardcoded ICMP sequence numbers and invalid protocol codes, rather than transient payload content. The strategic shift: Beyond legacy stealth While BPFDoor has been active for years, its codebase has evolved significantly. The threat actor continues to incorporate minor features into the original codebase leaked in 2022, resulting in a "messy" but effective toolkit designed to hinder threat hunting. Given the significant code overlap among BPFDoor variants, we focused on the minor, easily overlooked details the TA (threat actor) added to the leaked codebase. From memory to disk Historically, BPFDoor was known for appearing "fileless" by executing from /dev/shm and deleting itself. However, modern endpoint detection and response (EDR) tools now flag processes running from deleted inodes in temporary filesystems. Recognizing this, the developers of the httpShell variant have eliminated the /dev/shm drop. The malware now resides on disk, using a single, hard-coded process name to blend in as a no

The latest ThreatsDay Bulletin is basically a cheat sheet for everything breaking on the internet right now. No corporate fluff or boring lectures here, just a quick and honest look at the messy reality of keeping systems safe this week. Things are moving fast. The list includes researchers chaining small bugs together to create massive backdoors, old software flaws

p a href="https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-092-01.json" strong View CSAF /strong /a /p h2 Summary /h2 p strong Multiple SICAM 8 products are affected by multiple vulnerabilities that could lead to denial of service, namely: - SICAM A8000 Device firmware - CPCI85 for CP-8031/CP-8050 - SICORE for CP-8010/CP-8012 - RTUM85 for CP-8010/CP-8012 - SICAM EGS Device firmware - CPCI85 - SICAM S8000 - SICORE - RTUM85 Siemens has released new versions for the affected products and recommends to update to the latest versions. /strong /p p The following versions of Siemens SICAM 8 Products are affected: /p ul li CPCI85 Central Processing/Communication vers:intdot/ lt;26.10 (CVE-2026-27663, CVE-2026-27664) /li li RTUM85 nbsp;RTU Base vers:intdot/ lt;26.10 (CVE-2026-27663) /li li SICORE Base system vers:intdot/ lt;26.10.0 (CVE-2026-27664) /li /ul div class="csaf-table" table class="tablesaw tablesaw-stack" data-tablesaw-mode="stack" data-tablesaw-minimap thead tr th role="columnheader" data-tablesaw-priority="persist" CVSS /th th role="columnheader" Vendor /th th role="columnheader" Equipment /th th role="columnheader" Vulnerabilities /th /tr /thead tbody tr td v3 7.5 /td td Siemens /td td Siemens SICAM 8 Products /td td Allocation of Resources Without Limits or Throttling, Out-of-bounds Write /td /tr /tbody /table /div h3 Background /h3 ul li strong Critical Infrastructure Sectors: /strong Critical Manufacturing /li li strong Countries/Areas Deployed: /strong Worldwide /li li strong Company Headquarters Location: /strong Germany /li /ul hr h2 Vulnerabilities /h2 div class="csaf-accordion" p a class="csaf-accordion-toggle-all" href="#" Expand All + /a /p div class="csaf-accordion-item" h3 a class="csaf-accordion-toggle" href="#" CVE-2026-27663 /a /h3 div class="csaf-accordion-content" p The affected application contains denial-of-service (DoS) vulnerability. The remote operation mode is susceptible to a resource exhaustion condition when subjected to a high volume of requests. Sending multiple requests can exhaust resources, preventing parameterization and requiring a reset or reboot to restore functionality. /p p a href="https://www.cve.org/CVERecord?id=CVE-2026-27663" View CVE Details /a /p hr h4 Affected Products /h4 h5 Siemens SICAM 8 Products /h5 div class="ics-vendor-version-status" div class="ics-vendor" strong Vendor: /strong br Siemens /div div class="ics-version" strong Product Version: /strong br CPCI85 Central Processing/Communication, RTUM85 nbsp;RTU Base /div div class="ics-status" strong Product Status: /strong br known_affected /div /div div class="ics-remediations" h6 Remediations /h6 p strong Vendor fix /strong br Update to V26.10 or later version The firmware RTUM85 V26.10 is present within “CP-8010/CP-8012 Package” V26.10 https://support.industry.siemens.com/cs/ww/en/view/109972894/ and also within “SICAM S8000 Package” V26.10 https://support.industry.siemens.com/cs/document/109818240 /p p strong V

p a href="https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-092-02.json" strong View CSAF /strong /a /p h2 Summary /h2 p strong Successful exploitation of this vulnerability could allow an attacker to login as the PROG user and modify permissions. /strong /p p The following versions of Yokogawa CENTUM VP are affected: /p ul li CENTUM VP gt;=R5.01.00| /li li CENTUM VP gt;=R6.01.00| /li li CENTUM VP vR7.01.00 (CVE-2025-7741) /li /ul div class="csaf-table" table class="tablesaw tablesaw-stack" data-tablesaw-mode="stack" data-tablesaw-minimap thead tr th role="columnheader" data-tablesaw-priority="persist" CVSS /th th role="columnheader" Vendor /th th role="columnheader" Equipment /th th role="columnheader" Vulnerabilities /th /tr /thead tbody tr td v3 4 /td td Yokogawa /td td Yokogawa CENTUM VP /td td Use of Hard-coded Password /td /tr /tbody /table /div h3 Background /h3 ul li strong Critical Infrastructure Sectors: /strong Critical Manufacturing, Energy, Food and Agriculture /li li strong Countries/Areas Deployed: /strong Worldwide /li li strong Company Headquarters Location: /strong Japan /li /ul hr h2 Vulnerabilities /h2 div class="csaf-accordion" p a class="csaf-accordion-toggle-all" href="#" Expand All + /a /p div class="csaf-accordion-item" h3 a class="csaf-accordion-toggle" href="#" CVE-2025-7741 /a /h3 div class="csaf-accordion-content" p Affected products contain a hardcoded password for the user account (PROG) used for CENTUM Authentication Mode within the system. Under the following conditions, there is a risk that an attacker could log in as the PROG user. The default permission for the PROG users is S1 permission (equivalent to OFFUSER). Therefore, for properly permission-controlled targets of operation and monitoring, even if an attacker logs in as the PROG user, the risk of critical operations or configuration changes being performed is considered low. If the PROG user's permissions have been changed for any reason, there is a risk that operations or configuration changes may be performed under the modified permissions. Additionally, exploiting this vulnerability requires an attacker to already have access to the HIS screen controls. /p p a href="https://www.cve.org/CVERecord?id=CVE-2025-7741" View CVE Details /a /p hr h4 Affected Products /h4 h5 Yokogawa CENTUM VP /h5 div class="ics-vendor-version-status" div class="ics-vendor" strong Vendor: /strong br Yokogawa /div div class="ics-version" strong Product Version: /strong br Yokogawa CENTUM VP: gt;=R5.01.00| lt;R5.04.20, Yokogawa CENTUM VP: gt;=R6.01.00| lt;R6.12.00, Yokogawa CENTUM VP: vR7.01.00 /div div class="ics-status" strong Product Status: /strong br known_affected /div /div div class="ics-remediations" h6 Remediations /h6 p strong Mitigation /strong br Yokogawa recommends users applying the following mitigations to affected versions: /p p strong Vendor fix /strong br CENTUM VP R5.01.00 to R5.04.20: Change the user authentication mode to Windows Au

p a href="https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-092-03.json" strong View CSAF /strong /a /p h2 Summary /h2 p strong Hitachi Energy is aware of a Jasper Report vulnerability that affects the Ellipse product versions mentioned in this document below. This vulnerability can be exploited to carry out remote code execution (RCE) attack on the product. Please refer to the Recommended Immediate Actions for information about the mitigation/remediation. /strong /p p The following versions of Hitachi Energy Ellipse are affected: /p ul li Ellipse vers:Ellipse/ lt;=9.0.50 (CVE-2025-10492) /li /ul div class="csaf-table" table class="tablesaw tablesaw-stack" data-tablesaw-mode="stack" data-tablesaw-minimap thead tr th role="columnheader" data-tablesaw-priority="persist" CVSS /th th role="columnheader" Vendor /th th role="columnheader" Equipment /th th role="columnheader" Vulnerabilities /th /tr /thead tbody tr td v3 9.8 /td td Hitachi Energy /td td Hitachi Energy Ellipse /td td Deserialization of Untrusted Data /td /tr /tbody /table /div h3 Background /h3 ul li strong Critical Infrastructure Sectors: /strong Critical Manufacturing /li li strong Countries/Areas Deployed: /strong Worldwide /li li strong Company Headquarters Location: /strong Switzerland /li /ul hr h2 Vulnerabilities /h2 div class="csaf-accordion" p a class="csaf-accordion-toggle-all" href="#" Expand All + /a /p div class="csaf-accordion-item" h3 a class="csaf-accordion-toggle" href="#" CVE-2025-10492 /a /h3 div class="csaf-accordion-content" p A vulnerability exists in Jasper Report third party component that is used for creating custom reports in Ellipse product. A Java deserialization vulnerability has been discovered in Jaspersoft Library. Improper handling of externally supplied data may allow attackers to execute arbitrary code remotely on systems that use the affected library. /p p a href="https://www.cve.org/CVERecord?id=CVE-2025-10492" View CVE Details /a /p hr h4 Affected Products /h4 h5 Hitachi Energy Ellipse /h5 div class="ics-vendor-version-status" div class="ics-vendor" strong Vendor: /strong br Hitachi Energy /div div class="ics-version" strong Product Version: /strong br Ellipse versions 9.0.50 and prior /div div class="ics-status" strong Product Status: /strong br known_affected /div /div div class="ics-remediations" h6 Remediations /h6 p strong Mitigation /strong br Since the vulnerability exists in Jasper Report component that is external to Ellipse application, restrict the loading of external custom reports created by end users by allowing only trusted Jasper reports generated by the system administrator. /p /div p strong Relevant CWE: /strong a href="https://cwe.mitre.org/data/definitions/502.html" CWE-502 Deserialization of Untrusted Data /a /p hr h4 Metrics /h4 div class="csaf-table csaf-metrics-table" table class="tablesaw tablesaw-stack" data-tablesaw-mode="stack" data-tablesaw-minimap thead tr th role="columnheader" data-tablesaw-

p CISA has added nbsp;one nbsp;new nbsp;vulnerability nbsp;to its nbsp; a href="https://www.cisa.gov/known-exploited-vulnerabilities-catalog" Known Exploited Vulnerabilities (KEV) Catalog /a , based on evidence of active exploitation. nbsp; /p ul li a href="https://www.cve.org/CVERecord?id=CVE-2026-3502" target="_blank" CVE-2026-3502 /a nbsp;TrueConf nbsp;Client Download of Code Without Integrity Check Vulnerability nbsp; /li /ul p This type of vulnerability is a frequent attack vector for malicious cyber actors and poses significant risks to the federal enterprise. nbsp; /p p a href="https://www.cisa.gov/binding-operational-directive-22-01" Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities /a nbsp;established the KEV nbsp;Catalog as a living list of known Common Vulnerabilities and Exposures (CVEs) that carry significant risk to the federal enterprise. BOD 22-01 requires Federal Civilian Executive Branch (FCEB) agencies to remediate identified vulnerabilities by the due date to protect FCEB networks against active threats. See the nbsp; a href="https://www.cisa.gov/sites/default/files/publications/Reducing_the_Significant_Risk_of_Known_Exploited_Vulnerabilities_211103.pdf" BOD 22-01 Fact Sheet /a nbsp;for more information. nbsp; /p p Although BOD 22-01 only applies to FCEB agencies, CISA strongly urges all organizations to reduce their exposure to cyberattacks by prioritizing nbsp;timely nbsp;remediation of nbsp; a href="https://www.cisa.gov/known-exploited-vulnerabilities-catalog" KEV Catalog vulnerabilities /a nbsp;as part of their vulnerability management practice. CISA will continue to add vulnerabilities to the catalog that meet the nbsp; a href="https://www.cisa.gov/known-exploited-vulnerabilities" specified criteria /a . nbsp; /p

In December 2025, we shared the first-ever The State of Trusted Open Source report, featuring insights from our product data and customer base on open source consumption across our catalog of container image projects, versions, images, language libraries, and builds. These insights shed light on what teams pull, deploy, and maintain day to day, alongside the vulnerabilities and

Cisco has patched several critical and high-severity vulnerabilities, including an Integrated Management Controller (IMC) authentication bypass that enables attackers to gain Admin access. [...]

Microsoft is investigating a known issue that prevents some Classic Outlook users from sending emails via Outlook.com. [...]

(c) SANS Internet Storm Center. https://isc.sans.edu Creative Commons Attribution-Noncommercial 3.0 United States License.

A new malicious kit called EvilTokens integrates device code phishing capabilities, allowing attackers to hijack Microsoft accounts and provide advanced features for business email compromise attacks. [...]

Modern intrusions increasingly start with valid credentials and routine access, not exploits. Blackpoint Cyber's upcoming threat report shows how VPN abuse, RMM tools, and social engineering drive most incidents. [...]

In the latest episode of Rapid7’s Experts on Experts, I’m joined by Rapid7 CEO Corey Thomas for a candid conversation about where AI is genuinely changing security operations, and where the hype still outruns reality. The short version is that AI is already improving productivity in software development, but the bigger shift for security leaders is what it can do with telemetry at scale. As Corey puts it, no team of humans can process all security telemetry, all the time, across an entire environment. That gap is where AI can help, but only if the inputs are right. We also dig into what this means for Managed Detection and Response (MDR), and why the market is moving from “watch a subset of signals” toward monitoring the full environment, 24 x 7. The catch is that raw volume is not the goal. The goal is a comprehensive data set that enables decision making under pressure, with enough context to act early. AI is only as good as the context behind it One theme that kept coming up in our conversation is trust. Corey explains why earlier automation and SOAR efforts struggled. They followed strict rules, but security rarely behaves in strict patterns. When something looked similar but required a different response, teams hesitated to rely on automation. The dynamic rule making that newer AI models provide can help, but only if fueled with the right context. Corey breaks “context” into practical components: understanding what technologies are deployed, how they are configured, what controls exist, what vulnerabilities are present, and what activity is actually happening across those systems. Without that full picture, teams spend time chasing the wrong risks. He compares it to buying earthquake insurance without knowing where you live. If you are in California, it might make sense. If you are in Florida, hurricane coverage is the real concern. Context tells you which risk actually matters. Preemptive MDR is the shift CISOs should plan for now Where the conversation gets especially relevant for 2026 is the move from reactive to preemptive security. To frame the change in plain terms: reactive posture waits for alerts, while leaders want partners who anticipate and identify risks earlier. Corey describes preemptive MDR as an attack surface discipline. It starts with understanding the full attack surface, spotting where attacks are likely to occur, and identifying the most attractive exposures in the environment. The operational step is what matters: identifying those exposures quickly, prioritizing realistically, and having preset remediation and response plans ready before the moment hits. Corey is direct about constraints, too. No organization can remediate everything all the time, but better planning and efficiency are still possible, and business expectations of security leaders are rising. He also notes that government and regulators are pushing in the same direction, and that Gartner and other analysts are reinforcing the shift toward anticipation

There is a character that keeps appearing in enterprise security departments, and most CISOs know exactly who that is. It doesn t build. It doesn t enable. Its entire function is to say "No." No to ChatGPT. No to DeepSeek. No to the file-sharing tool the product team swears by. For years, this looked like security. But in 2026, "Doctor No" is no longer just a management headache &

A multi-pronged phishing campaign is targeting Spanish-speaking users in organizations across Latin America and Europe to deliver Windows banking trojans like Casbaneiro (aka Metamorfo) via another malware called Horabot. The activity has been attributed to a Brazilian cybercrime threat actor tracked as Augmented Marauder and Water Saci. The e-crime group was first documented by Trend Micro in