All news with #advisory tag

🔒 The UK’s National Cyber Security Centre (NCSC) has published new guidance for organisations considering the adoption of agentic AI, summarising a wider report produced with Five Eyes partners. It flags the heightened risk from agent autonomy and complexity, including excessive access, unpredictable behaviour and actions that can outpace human review. The NCSC advises incremental deployment with tightly bounded pilots, clear ownership, ongoing monitoring and meaningful human oversight, and points organisations to industry best practice such as ETSI EN 304 223.

🛡️Chaotic Eclipse has published a proof-of-concept for a Windows privilege escalation zero-day, dubbed MiniPlasma, which targets the Cloud Files Mini Filter Driver (cldflt.sys) in the HsmOsBlockPlaceholderAccess routine. Originally reported to Microsoft in September 2020 and linked to CVE-2020-17103, the researcher says the exact issue remains unpatched. Tests show it can spawn a SYSTEM shell on fully patched Windows 11 systems running May 2026 updates, though success rates vary due to a race condition.

⚠️ Microsoft confirmed that the May 2026 Windows 11 cumulative update KB5089549 can fail to install and roll back on systems with limited free space on the EFI System Partition (ESP). Installation may proceed to about 35–36% before aborting with 0x800f0922 errors and the rollback message. Logs show SpaceCheck: Insufficient free space and servicing boot file errors. Microsoft advises using Known Issue Rollback or applying a Group Policy in managed environments to mitigate.

🔒 A proof-of-concept exploit is available for the recently patched DirtyDecrypt (aka DirtyCBC) local privilege escalation in the Linux kernel's rxgk module, enabling attackers to gain root on systems built with CONFIG_RXGK enabled. The flaw, independently reported by the V12 team on May 9, aligns with CVE-2026-31635, which was patched in late April. The PoC has been tested against Fedora and mainline kernels and mainly affects distributions that track upstream releases, such as Fedora, Arch, and openSUSE Tumbleweed. Users should apply kernel updates or use recommended mitigations until patches are deployed.

🔒 A researcher known as Chaotic Eclipse published a proof-of-concept exploit and a compiled executable for a Windows privilege escalation zero-day named MiniPlasma. The researcher says the issue affects the cldflt.sys Cloud Filter driver and an undocumented CfAbortHydration API, and claims the bug traces back to a 2020 report (CVE-2020-17103). BleepingComputer tested the PoC on a fully patched Windows 11 Pro system (May 2026 updates) and reproduced SYSTEM-level access. Microsoft has been contacted for comment.

⚠️ A high-severity heap buffer overflow (CVE-2026-42945, CVSS 9.2) in the ngx_http_rewrite_module of NGINX Plus and NGINX Open (versions 0.6.27–1.30.0) is being exploited in the wild shortly after disclosure. The flaw, reportedly introduced in 2008, can allow unauthenticated attackers to crash worker processes or, when Address Space Layout Randomization (ASLR) is disabled and certain configurations are present, achieve remote code execution. Users are advised to apply F5's fixes and review server configurations urgently.

🔒 Cisco has released fixes for a maximum-severity authentication bypass in Cisco Catalyst SD-WAN Controller (CVE-2026-20182) that it says has been exploited in limited attacks. The flaw allows a remote unauthenticated attacker to become an authenticated peer and obtain administrative privileges by abusing the peering authentication mechanism. Affected deployments include On-Prem, Cisco SD-WAN Cloud-Pro, Cisco SD-WAN Cloud (Cisco Managed), and Cisco SD-WAN for Government (FedRAMP); Cisco urges immediate patching and recommends auditing /var/log/auth.log for suspicious peering or publickey entries.

⚠️ CISA added one vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog on 2026-05-14 after confirming active exploitation. The agency warns that such vulnerabilities are common attack vectors and present significant risk to the federal enterprise. CISA directs organizations to follow Emergency Directive 26-03 and BOD 22-01 guidance, assess exposure, and apply mitigations or discontinue affected Cisco SD-WAN products if mitigations are not available.

🔐 The ICO has published a five-step guide urging organisations to prepare for AI-enhanced cyber threats, including deepfake social engineering, adaptive malware and automated exploitation. It points readers to the NCSC's updated Cyber Assessment Framework and expects baseline adoption of Cyber Essentials and the UK Cyber Governance Code. The guidance emphasises robust patching, MFA, least‑privilege, supply‑chain vetting, DPIAs for high‑risk AI and human oversight of AI-enabled defences.

🔍 Security researchers have identified a campaign called GemStuffer that abuses RubyGems as a storage channel for scraped content rather than as a vehicle for mass malware distribution. More than 150 gems were observed packaging HTTP responses from U.K. local government ModernGov portals into valid .gem archives and publishing them using hardcoded API keys. Variants either build and push gems via the CLI (creating temporary credentials under /tmp and overriding HOME) or upload archives directly to the registry API, after which attackers can retrieve the content with a simple gem fetch.

🔒 ABB disclosed multiple vulnerabilities in the WebPro SNMP Card PowerValue affecting earlier firmware releases. The flaws include an authentication bypass (the device validates only the first character of session cookies and tokens), insufficient session expiration and uncontrolled resource consumption that can cause DoS and Modbus instability on port 502. ABB issued fixes in v1.1.8.p and recommends contacting ABB Digital Service Support and applying defensive measures from the product manual.

⚠️ ABB reported a vulnerability in the Windows Gateway component of Automation Builder that leaves its TCP listener bound to all interfaces by default on port 1217, enabling remote discovery of AC500 PLCs. The gateway may be installed standalone or bundled with other setups such as CODESYS, and unauthenticated actors can scan for PLCs; PLC user management normally prevents control unless disabled. ABB advises restricting access by setting [CmpGwCommDrvTcp] LocalAddress=127.0.0.1 in Gateway.cfg and restarting the gateway, or upgrading to Automation Builder 2.9.0 where the default is local-only.

🔒 Microsoft warns of a new local Linux privilege escalation called Dirty Frag that abuses fragmented page-cache handling to gain root. The chain uses two kernel flaws — CVE-2026-43284 (ESP) and CVE-2026-43500 (RxRPC) — and is already observed in post-compromise attacks. Administrators are urged to disable esp4, esp6, and rxrpc modules, limit local shell access, and monitor for abnormal privilege escalation while vendors roll out patches.

⚠️ The FCC has extended the deadline for suppliers of banned foreign-made consumer routers to deliver security updates to US customers until at least 1 January 2029. The March 2026 import and sale ban put these devices on the FCC’s covered list, with limited exceptions for devices conditionally approved by the DoD or DHS. The extension, announced by the Commission’s Office of Engineering and Technology on 8 May, permits only software and firmware updates that mitigate harm and maintain functionality, not the addition of new features, and it also covers foreign-made drone systems and critical components.

⚠️ Cisco released patches for a high-severity denial-of-service vulnerability (CVE-2026-20188) affecting Crosswork Network Controller (CNC) and Network Services Orchestrator (NSO). The issue stems from inadequate rate limiting on incoming connections and can be exploited remotely by unauthenticated actors to exhaust connection resources and crash systems. Affected releases include CNC 7.1 and earlier and NSO 6.3 and earlier; fixed releases and mitigations are detailed in Cisco's advisory. Cisco's PSIRT says it is not aware of active exploitation but strongly urges customers to upgrade to patched software to avoid manual reboots and service disruption.

🔒 On April 29, 2026 researchers disclosed CVE-2026-31431, dubbed Copy Fail, a deterministic local privilege escalation impacting Linux kernels 4.14–6.19.12. The flaw resides in the AF_ALG crypto interface's algif_aead module and permits a controlled four-byte overwrite into the kernel page cache. A standalone 732-byte Python proof-of-concept reliably escalates to root across major distributions. Apply vendor kernel updates immediately or temporarily disable algif_aead; Cortex XDR and XSIAM provide layered detection and mitigation.

🔒 A Norwegian researcher discovered that Microsoft Edge decrypts saved passwords at startup and keeps them resident in process memory, leaving credentials retrievable in plain text on shared or compromised machines. German publication Heise reproduced the finding, locating passwords even after a browser restart. Microsoft reportedly treats the behavior as 'by design,' prompting calls for using alternative password managers.

🔒 A joint advisory from CISA and international partners urges organizations to treat agentic AI cautiously, enforcing strong authentication, Secure by Design principles, and staged rollouts. The guidance stresses least privilege, inventories of agent capabilities, and protections against prompt injection and data exposure. It also recommends continuous monitoring with human-in-the-loop controls, DevSecOps practices, and regular incident-response testing to reduce privilege creep, tool misuse, and other emergent risks.

🔒CISA warns that threat actors are actively exploiting the Linux "Copy Fail" vulnerability tracked as CVE-2026-31431. The flaw exists in the kernel's algif_aead cryptographic algorithm interface and lets unprivileged local users gain root by writing four controlled bytes to the page cache of any readable file. Theori published a "100% reliable" Python PoC; vendors are issuing kernel fixes and CISA has ordered federal patches under BOD 22-01.

⚠️ A path traversal vulnerability in ABB PCM600 (CVE-2018-1002208) could allow an attacker to deliver specially crafted messages to a system node, resulting in insertion and execution of arbitrary code. Affected releases are PCM600 versions >=1.5 and <=2.13; ABB released a fix in PCM600 2.14 (note: RE_630 relays are incompatible with 2.14). CISA rates the issue CVSS 3.1 4.4 (AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N), notes exploitation is not remotely trivial, and recommends applying the vendor update or, where immediate upgrade is impractical, applying system-level and network mitigations such as segmentation, firewalls, and updated VPNs.