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Background for this topic.

A flaw is a defect in software, hardware, system design, or configuration that causes unintended behavior. In security reporting, the term usually means a weakness that could violate confidentiality, integrity, or availability when reached through a particular interface, input, privilege, or operating condition. Not every flaw is exploitable, and exploitability depends on factors such as exposure, authentication requirements, affected versions, and available mitigations.

Flaws matter because they can create attack paths in applications, operating systems, devices, APIs, or administrative settings. Security teams assess their severity and exposure, prioritize remediation, apply patches or configuration changes, and use isolation or access controls when immediate fixes are unavailable. Code review, testing, vulnerability scanning, and monitoring can reveal flaws across the development and operational lifecycle. Reports should distinguish a confirmed vulnerability from a theoretical defect and provide enough technical detail to support validation without unnecessarily enabling exploitation.

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U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds SolarWinds Serv-U flaw to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added SolarWinds Serv-U flaw, tracked as CVE-2026-28318 (CVSS ver 3.1 score of 7.5), to its Known Exploited Vulnerabilities (KEV) catalog. SolarWinds Serv-U is a managed file transfer (MFT) and secure file […]

Claude Opus 4.8 helped uncover a four-year-old critical flaw in Zcash that could have enabled undetectable creation of counterfeit coins. On May 29, the security researcher Taylor Hornby found a critical vulnerability in Zcash Orchard privacy pool using Claude Opus 4.8. The Zcash team hired Hornby specifically to look for this kind of issue. He […]

Cisco warns of CVE-2026-20245 in SD-WAN Manager, a flaw that can lead to root access via file upload command injection; no patch or workaround yet. Cisco warns of a privilege escalation flaw, tracked as CVE-2026-20245 (CVSS base score of 7.8), in Cisco Catalyst SD-WAN Manager, the platform formerly known as SD-WAN vManage. An authenticated local […]

Also: Gas Station Monitoring Systems Under Attack, Spanish Teen Doxer ArrestedThis week, more happened than fits here: Microsoft tried to make nice with researchers, gas tank gauges under attack in the United States, fake FIFA websites are everywhere. Russia cried cyberespionage, Spanish police arrested a teenage doxer, a Oracle WebLogic flaw was actively exploited.

U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds Mirasvit Full Page Cache Warmer flaw to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added Mirasvit Full Page Cache Warmer flaw, tracked as CVE-2026-45247 (CVSS ver 4.0 score of 9.3), to its Known Exploited Vulnerabilities (KEV) catalog. The CVE-2026-45247 flaw is a […]

A security researcher found a flaw in Anthropic's Claude Code GitHub Action that let an attacker take over vulnerable public repositories running it, with nothing more than a single opened GitHub issue. Because Anthropic's own action repo used the same workflow, a working attack could have pushed malicious code into the action itself and onto the projects downstream that pull it

Cisco patched a critical Unified CM flaw with public PoC code that allows unauthenticated attackers to launch SSRF attacks remotely. Cisco has addressed a high-severity vulnerability, tracked as CVE-2026-20230, affecting Unified CM and Unified CM SME. The flaw, caused by improper validation of certain HTTP requests, allows a remote attacker without authentication to perform server-side […]

Gamaredon exploits a WinRAR flaw to drop modular, nearly fileless malware on Ukrainian targets, hiding payloads in Windows streams and resolving C2s via Telegram. Sekoia’s Threat Detection & Research team dropped a YARA rule in late December 2025 to hunt for new initial access vectors, and by January 2026 it had already generated a dozen […]

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Wednesday added a critical flaw impacting Mirasvit Cache Warmer, a popular Magento full-page cache extension, to its Known Exploited Vulnerabilities (KEV) catalog, following reports of active exploitation in the wild

U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds Android and Linux Kernel flaws to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added Windows Shell and ConnectWise ScreenConnect flaws to its Known Exploited Vulnerabilities (KEV) catalog. Below are the flaws added to the catalog: The first flaw added to the catalog, tracked […]

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