All news in category “Security Advisory and Patch Watch”

🔒 Cisco has released patches for a critical Integrated Management Controller (IMC) authentication bypass (CVE-2026-20093) that allows unauthenticated, remote attackers to gain Admin privileges by sending a crafted HTTP password-change request. The flaw affects CIMC on UCS C-Series and E-Series servers and permits altering any account password, including Admin. Cisco's PSIRT reports no known in-the-wild exploitation or public proof-of-concept yet and stresses there are no workarounds, so customers should upgrade to fixed software immediately.

⚠️ Shadowserver reports over 14,000 Internet-exposed BIG-IP APM instances remain vulnerable to CVE-2025-53521 after the flaw was reclassified from DoS to remote code execution. F5 confirmed the reclassification and warned that attackers are exploiting unpatched systems with access policies on virtual servers. F5 and CISA have published IOCs and mitigation guidance, and F5 recommends rebuilding compromised devices from known-good sources.

🔒Apple expanded iOS 18.7.7 and iPadOS 18.7.7 availability on April 1, 2026, to protect a broader range of devices from the web-based exploit kit DarkSword. The release now covers many iPhone models from XR through the 16 series and multiple iPad mini, Air and Pro configurations, including devices capable of running iOS 26 but still on older releases. The backported fixes let users with Automatic Updates receive protections without upgrading to iOS 26; users without auto-update can choose the patched iOS 18 build or move to iOS 26. Apple also began issuing Lock Screen alerts to urge installations of the security patches.

🔒 Apple has expanded availability of iOS 18.7.7 to a broader set of iPhones and iPads to ensure devices remaining on iOS 18 receive protections against the actively exploited DarkSword exploit kit. The update delivers fixes for multiple vulnerabilities first mitigated in 2025 and addresses additional CVEs disclosed through 2026. Users with Automatic Updates enabled on eligible devices will receive these protections automatically. Researchers observed deployment of information-stealing and backdoor malware families including GhostBlade, GhostKnife, and GhostSaber in attacks exploiting these flaws.

🔎 Researcher Hung Nguyen used simple prompts with Anthropic’s Claude Code to rapidly discover zero-day remote code execution flaws in Vim and GNU Emacs, showing that legacy codebases can be probed far faster by advanced LLMs than by conventional fuzzing. Within minutes Claude Code located missing security checks and generated proof-of-concept exploit ideas, prompting a quick patch for Vim (CVE-2026-34714). Emacs' maintainers declined to treat the finding as an Emacs bug, pointing to Git and leaving suggested manual mitigations for affected releases. The episode highlights both the power of AI-assisted research and the attendant risks of simpler exploit development.

🔔 CISA has added CVE-2026-5281, a Google Dawn use-after-free vulnerability, to its Known Exploited Vulnerabilities (KEV) Catalog after evidence of active exploitation. The listing invokes BOD 22-01 remediation requirements for Federal Civilian Executive Branch agencies, which must remediate by the specified due date. CISA strongly urges all organizations to prioritize timely remediation and strengthen vulnerability management, as use-after-free flaws are a common and impactful attack vector.

🔒 Google released updates for Chrome to fix 21 vulnerabilities, including a zero-day (CVE-2026-5281) that has been exploited in the wild. Dawn, the WebGPU implementation, contains a use-after-free bug allowing a remote attacker with access to the renderer process to execute arbitrary code via crafted HTML. Users should update to versions 146.0.7680.177/178 on Windows and macOS and 146.0.7680.177 on Linux, and ensure Chromium-based browsers receive vendor patches.

⚠️ Google released emergency updates to fix a fourth actively exploited Chrome zero-day, tracked as CVE-2026-5281. The issue is a use-after-free in Dawn, Chromium's implementation of the WebGPU standard, and can cause crashes, rendering problems, or data corruption. Patches are available on Stable Desktop for Windows, macOS (146.0.7680.177/178), and Linux (146.0.7680.177); rollouts may take days, but updates are immediately available when checking.

🛠️ Microsoft released an out-of-band update, KB5086672, to replace the broken March preview KB5079391 and address installation failures that produced Error 0x80073712 on Windows 11 24H2 and 25H2 systems. The cumulative OOB update supersedes prior March protections and improvements and may be offered automatically to devices with "Get the latest updates" enabled. If that setting is off, install via Settings > Windows Update > Download & install.

⚠️ The GIGABYTE Control Center contains a critical arbitrary file-write vulnerability (CVE-2026-4415) affecting versions 25.07.21.01 and earlier when the pairing feature is enabled. Taiwan's CERT warns unauthenticated remote attackers could write files anywhere on the underlying OS, enabling arbitrary code execution, privilege escalation, or denial-of-service. GIGABYTE released version 25.12.10.01 with fixes for download path management, message processing, and command encryption and strongly advises immediate upgrade; users should obtain installers only from the vendor portal to avoid trojanized packages.

🛡️ Researcher Hung Nguyen used the Claude assistant to locate remote code execution flaws in Vim and GNU Emacs that can trigger simply by opening a crafted file. Claude produced multiple refined proof‑of‑concept exploits and suggested mitigations. Vim was patched in Vim 9.2.0272, while the Emacs issue remains unpatched because maintainers attribute the root cause to Git's core.fsmonitor behavior; users should avoid opening untrusted files.

⚠️ Five-month-old F5 BIG-IP APM flaw initially classified as a denial-of-service is now confirmed as a pre-authentication remote code execution vulnerability (CVE-2025-53521) being exploited in the wild. F5 updated its advisory, raised the CVSS to 9.8, and CISA added the issue to its KEV catalog after reports of active exploitation and observed root‑level malware persistence. Affected versions include 15.1.x, 16.1.x, 17.1.x and 17.5.x; F5 has released fixes, IOCs, and hardening guidance, but organizations should patch immediately and perform compromise assessments rather than rely solely on backups.

⚠️A security flaw in ChatGPT could be triggered by a single malicious prompt to create a covert exfiltration channel, researchers at Check Point reported. The issue allowed data to be leaked via a DNS side channel from the model’s isolated runtime and was patched by OpenAI on 20 February after disclosure. Check Point demonstrated extraction of uploaded files and private prompts and warned that users copying prompts from public sources could be exposed.

🔒 Researchers disclosed two vulnerabilities in OpenAI’s AI stack affecting Codex and ChatGPT. BeyondTrust found a command injection flaw in Codex that let a malicious GitHub branch name execute code inside task containers and expose short-lived GitHub tokens. Check Point Research discovered a hidden outbound channel in ChatGPT’s code execution runtime that could silently transmit chats, uploads, or outputs to an external server. OpenAI patched both issues before public disclosure and researchers warn that autonomous code execution increases long-term risk.

🛠️ Microsoft has resolved a bug that caused the classic Outlook client to crash when the Microsoft Teams Meeting Add-in was enabled. First reported on March 12 and tracked under incident EX1254044, the issue occurred when older Outlook builds used the Teams Meeting Add‑in build 1.26.02603, for example Current Channel Outlook <= Version 2402 (Build 17328.20142). A fix is rolling out with Teams version 26058.712.4527.9297; Microsoft recommends updating Outlook to the latest build or performing an Online Repair for click‑to‑run installs. As a temporary workaround, users who must remain on an older Office build can disable the Teams Meeting Add‑in via Outlook Safe Mode (Ctrl on launch) and the COM Add‑ins dialog.

⚠️ Anritsu Remote Spectrum Monitor models MS27100A, MS27101A, MS27102A, and MS27103A contain an inherent authentication bypass (CVE-2026-3356) that permits unauthenticated network users to access and control the device management interface. The vendor reports no planned patch and confirms the issue is a design limitation with no configurable authentication. Successful exploitation can expose signal data, change operational settings, or render devices unavailable. CISA recommends isolating affected devices and restricting network access.

⚠️ A critical authentication flaw (CVE-2026-1579) in the MAVLink protocol used by PX4 Autopilot can allow unauthenticated actors with MAVLink access to execute arbitrary shell commands via the SERIAL_CONTROL message. The issue affects PX4 Autopilot v1.16.0_SITL_latest_stable. PX4 recommends enabling MAVLink 2.0 message signing for all non‑USB links and following the vendor's security hardening guidance to reduce exposure.

⚠️ The UK’s NCSC is urging organisations to immediately patch a critical vulnerability in F5 BIG-IP Access Policy Manager (APM) tracked as CVE-2025-53521, which is under active exploitation and can enable remote code execution when an APM access policy is configured on a virtual server. F5 has reclassified the issue from a denial‑of‑service to RCE with a revised CVSS of 9.8 after new information, and CISA has added it to its KEV catalog with a mandated federal patch deadline. Customers should follow F5’s incident‑handling and forensic guidance, isolate or rebuild affected systems, and report suspected compromises to the NCSC.

⚠️ CISA has ordered federal agencies to patch Citrix NetScaler appliances for CVE-2026-3055 by Thursday, April 2, after vendors warned the flaw is being actively exploited. The vulnerability arises from insufficient input validation in ADC and Gateway appliances configured as SAML identity providers and can enable unauthenticated attackers to steal admin session IDs and other sensitive information. Watchtowr reported in-the-wild abuse days after Citrix released fixes on March 23, and CISA has added the issue to its KEV Catalog and invoked BOD 22-01.

🔒 CrowdStrike outlines detection for CVE-2026-20929, a Kerberos relay vulnerability exploited via DNS CNAME abuse that can enroll certificates from Active Directory Certificate Services (AD CS). Their correlation-based detection flags anomalous certificate-based authentications coincident with unusual AD CS Kerberos service access within a short time window. Customers can enable the provided CRT rule in Falcon Next‑Gen SIEM to activate alerts and support hunting.