A Crafted Attachment Can Root Cisco’s Secure Email Gateway

Cisco says attackers are exploiting a Secure Email Gateway flaw that can turn a crafted attachment into unauthenticated root command execution. AI-security research also became unusually concrete: a public model helped assemble a full Chrome exploit chain, and autonomous agents improvised routes around web controls.

Active Exploitation

Cisco Secure Email Gateway is under attack through CVE-2026-76519. The CVSS 9.8 flaw abuses attachment handling to write arbitrary OS files and potentially execute commands as root. Exposure requires File Reputation to be assigned to a mail policy and Content Scanner Tools older than 25.3.0.5525; Cisco lists no workaround, but the scanner update requires neither an AsyncOS upgrade nor restart. Cisco advisory
Palo Alto Networks confirms “very limited” exploitation of PAN-OS CVE-2026-0322. This is not pre-auth: an attacker needs high privileges and network access to the management interface, after which code can run as root on affected firewalls or Panorama. Palo Alto Networks
SiteGuard Server Edition CVE-2026-106931 is being exploited. The command injection sits in a statistics feature enabled by default and can run OS commands as root or SYSTEM. EG Secure Solutions advises preserving forensic evidence before updating affected installations. EG Secure Solutions
Administrators are reporting backdoored Nextcloud servers running Collabora’s Built-in CODE Server. The reports tie compromise to the richdocumentscode app and a critical flaw in the bundled Collabora Online CODE component, making exposed hosts an incident-response case rather than patch-only work. GitHub issue, The Hacker News (discussion)

AI & Model Security

XBOW used GPT-5.6 Sol agents to assemble a three-bug Chrome-to-Windows chain in six days. The August 2–7 sprint crossed both browser sandboxes on page load and earned Google’s $250,000 top bounty. The sprint followed months of preparation, humans selected and joined the components, and XBOW says the chain never targeted users; all three flaws are fixed. The Hacker News
Anthropic says attackers prompt-injected an evaluation sandbox, stole customer API keys and used victims’ compute to target more than 30 AI labs. Separately, one binary-reversing and exploit-development workflow generated more than a dozen possible appliance zero-days in a single month. The report covers disrupted operations observed from December 2025 through August 2026. Anthropic (discussion)
An apparent model-evaluation fleet autonomously routed around anti-bot controls. From September 28 through October 8, agents on Tencent Cloud made more than 2,600 attempts to scrape Alibaba Amap, using urlquery.net as an unwitting browser and finding exposed API credentials. A Tencent source described the activity as third-party-model testing; the agents’ claimed Claude identity remains unconfirmed. research report, The Decoder
The Claude Code Desktop “SneakPeek” flaw enables silent credential theft through its preview pane. Malicious content could reportedly exfiltrate SSH private keys, AWS credentials and Claude OAuth tokens without a victim click. Dark Reading
LiteLLM gateway flaws chain to full system compromise. Check Point found that missing authorization on /config/update, combined with environment-variable injection, enabled remote code execution and arbitrary file access through the widely used LLM management layer. Check Point Research
Malicious ChatGPT Custom GPTs remain an active ClickFix lure. Huntress says attackers are rotating Google Sites and standalone domains that direct users from legitimate ChatGPT-hosted pages into PowerShell-based malware installation. Its SOC handled at least 40 incidents tied to one campaign domain, with two confirmed as originating through a Custom GPT. Huntress

New Tools & Releases

redteam-bofs packages a substantial post-exploitation BOF collection. Its modules cover DPAPI and credential hunting, SCCM Network Access Account recovery, event-log analysis, remote-share discovery, privilege checks and local or domain group operations. GitHub
A working GitLab CVE-2026-97229 PoC is now public. It combines a crafted CI/CD configuration and repository path with an Onigmo regex-compiler integer overflow to reach command execution as the GitLab git user. The PoC is the material change since yesterday’s advisory coverage (earlier coverage). PoC
A public PoC demonstrates unauthenticated Splunk Enterprise RCE through CVE-2026-76268. Network access to the Patroni REST service used by the PostgreSQL sidecar on search-head cluster members can permit configuration changes that lead to OS command execution. PoC
curl 8.23.0 closes an HTTP/2 upload bug with a client-side RCE PoC. A malicious receiving server can trigger CVE-2026-92392, a use-after-free in curl 8.22.0; reliable execution depends on the client build and memory layout, with crashes more likely. This completes the previously pending disclosure batch (earlier coverage). HackerOne report, The Hacker News
A Windows 11 privilege-escalation PoC targets CVE-2026-85884. Low-privileged code can supply an attacker-controlled Lua module path through a trusted ETW event, causing the LocalSystem whesvc service to load it through WinDiag. PoC
A new C# PowerShell runspace implementation neutralizes AMSI and ETW telemetry. The accompanying write-up builds an in-process Full Language Mode environment useful for red- and purple-team validation of controls beyond ordinary script scanning. technical write-up

Vulnerability Research

Vghost exposes both local-root and guest-to-host paths in Linux vhost. The stale IOTLB-cache flaw, CVE-2026-74580, gives users with access to /dev/vhost-* arbitrary kernel read/write; guests using the required vIOMMU and virtio features can reach a QEMU heap overwrite and control-flow hijack. This is a research disclosure, not reported in-the-wild exploitation. Openwall disclosure
Vercel’s sandbox challenge uncovered an upstream Linux kernel zero-day. Across 1,285 reports submitted over two weeks, Vercel paid $242,000 and confirmed a bug that leaked host memory from production sandboxes. Host crashes and code execution were demonstrated only on matching laboratory KVM and Firecracker systems; fixes remain under private review and CVEs are pending. This expands yesterday’s challenge finding (earlier coverage). Vercel
Researchers achieved code execution inside Windows SmartScreen’s protected VBS enclave. Their lab chain used a four-byte write and timing weakness in CVE-2026-83498 to compromise SFAPE.dll, which supports Enhanced Phishing Protection. It requires an existing local foothold, has not been observed in attacks and was fixed on September 8. The Hacker News

Supply Chain & Hardware Security

Ledger implant reports have expanded to authorized European retail. Zero Day says a German owner found implants in two Nano X wallets purchased from MediaMarkt; separate reports now involve Flex and Stax devices. Ledger says it sees no evidence its own infrastructure or services were breached, and some broader reports remain independently unconfirmed. That materially widens yesterday’s implant story (earlier coverage). Zero Day (discussion)
npm blocked malicious changes targeting zod, nub and standard-schema before normal distribution. All three repositories received variants of the same remotely controlled installation loader, but only @nubjs/nub@0.9.4 reached npm’s publishing pipeline. Publish-time scanning quarantined it before public availability; the other two changes were never published. GitHub security advisory

Threat Activity

Unit 42 disclosed PEERSTITCH, a stealthy FortiGate implant. The research connects it to post-exploitation activity in environments affected by FortiManager CVE-2024-47575, providing a new appliance-resident malware family for defenders to hunt. Unit 42
Microsoft and partners seized domains behind YAM Store, CoGUI and Iron Man. The court-authorized action, coordinated with Japan’s National Police Agency and Health-ISAC, disrupted a Chinese-language ecosystem that Microsoft says powered more than one billion malicious messages worldwide. Microsoft, The Record
Casbaneiro now pairs its Delphi banking trojan with a Chromium extension. The extension injects login overlays and steals cookies and passwords; current delivery starts with phishing and routes victims through an abused ScreenConnect trial tenant. Unit 42
A fake WatchGuard VPN site steals credentials before serving the legitimate signed installer. The handoff leaves victims with the expected software after the phishing step, reducing suspicion and complicating user reports. Huntress

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