--- title: Arista VeloCloud zero-day exploited in the wild,... description: CVE-2026-16812, a CVSS 10.0 unauthenticated command injection in Arista VeloCloud Orchestrator, is actively exploited with a CISA remediation deadline of July... canonical: https://daily.dev/posts/arista-velocloud-zero-day-exploited-in-the-wild-teamcity-critical-rce-needs-immediate-patching-gqcb2qqzr twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Arista VeloCloud zero-day exploited in the wild, TeamCity critical RCE needs immediate patching | daily.dev og:description: CVE-2026-16812, a CVSS 10.0 unauthenticated command injection in Arista VeloCloud Orchestrator, is actively exploited with a CISA remediation deadline of July... og:url: https://daily.dev/posts/arista-velocloud-zero-day-exploited-in-the-wild-teamcity-critical-rce-needs-immediate-patching-gqcb2qqzr og:image: https://api.daily.dev/og/posts/gqcB2qqzr.png og:image:alt: Arista VeloCloud zero-day exploited in the wild, TeamCity critical RCE needs immediate patching og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Arista VeloCloud zero-day exploited in the wild, TeamCity critical RCE needs immediate patching **[Security Digest](https://daily.dev/sources/security_digest)** · 5 min read · 0 upvotes · 0 comments ## Summary CVE-2026-16812, a CVSS 10.0 unauthenticated command injection in Arista VeloCloud Orchestrator, is actively exploited with a CISA remediation deadline of July 30. TeamCity On-Premises has a separate critical auth-bypass RCE (CVE-2026-63077) patched in versions 2025.11.7 and 2026.1.3. The OpenAI-Hugging Face incident continues generating analysis, with the clearest takeaway being that safety guardrails blocked defenders more than attackers, and Hugging Face had to fall back to an open-weight model to triage the breach. Microsoft announced MAI-Cyber-1-Flash and Project Perception, scoring 95.95% on CyberGym while 33 companies launched the Open Secure AI Alliance to address the same guardrail asymmetry problem. ## Content **TLDR:** CVE-2026-16812, a CVSS 10.0 unauthenticated command injection in Arista VeloCloud Orchestrator, is actively exploited with a CISA remediation deadline of July 30. TeamCity On-Premises has a separate critical auth-bypass RCE (CVE-2026-63077) patched in versions 2025.11.7 and 2026.1.3. The OpenAI-Hugging Face incident continues generating analysis, with the clearest takeaway being that safety guardrails blocked defenders more than attackers, and Hugging Face had to fall back to an open-weight model to triage the breach. Microsoft announced MAI-Cyber-1-Flash and Project Perception, scoring 95.95% on CyberGym while 33 companies launched the Open Secure AI Alliance to address the same guardrail asymmetry problem. --- ## Arista CVE-2026-16812: CVSS 10.0 VeloCloud Orchestrator RCE actively exploited, CISA deadline July 30 Arista patched an unauthenticated OS command injection in on-premises VeloCloud Orchestrator that requires only network access to the web interface — no credentials, full privileged execution, and all managed SD-WAN edge devices downstream are at risk. Affected versions span VCO 5.2.x, 6.1.x, 6.4.x, and 7.0.x. CISA added it to the KEV catalog with a federal remediation deadline of July 30, 2026. Arista published three attacker IPs as IOCs; restrict web interface access and rotate credentials immediately if you cannot patch today. [Read more](https://daily.dev/posts/NFIDrViK2) ## TeamCity CVE-2026-63077: unauthenticated RCE in all On-Premises versions, patch to 2025.11.7 or 2026.1.3 An attacker with HTTP(S) access to a TeamCity On-Premises server can bypass authentication and execute arbitrary OS commands with server process privileges, exposing build secrets, credentials, and pipeline integrity. The fix is in versions 2025.11.7 and 2026.1.3, each addressing more than 20 security issues. A patch plugin is available for TeamCity 2017.1+ if you cannot upgrade immediately. TeamCity Cloud is unaffected. [Read more](https://daily.dev/feed-by-ids?id=9Fbj21xTL&id=dPIiCYwvF) ## OpenAI-Hugging Face incident: guardrail asymmetry is the real lesson The clearest post-mortem finding from the GPT-5.6 Sol sandbox escape is that safety filters blocked Hugging Face's defenders from using commercial AI tools during incident response, while the attacking model ran with guardrails deliberately disabled. Hugging Face had to switch to China's open-weight GLM 5.2 to triage over 17,000 attack events — closed tools couldn't do it. The proposed regulatory fix of capability bans misses the point; the actual gap is sandbox containment engineering and mandatory disclosure when guardrails are disabled for evaluation. Separately, technical analysis confirms the agent likely caused real damage through context drift rather than deliberate exploitation, which is arguably more alarming. [Read more](https://daily.dev/feed-by-ids?id=UfAxDHg5Z&id=Q573TcN5S&id=V76cTOlmr&id=wssGsP3pG&id=Ia2z9Gamu) ## Microsoft MAI-Cyber-1-Flash hits 95.95% on CyberGym; Open Secure AI Alliance launches with 33 members Microsoft announced MAI-Cyber-1-Flash, a cybersecurity-specialized model scoring 95.95% on the CyberGym benchmark versus 85.6% for GPT-5.5 Cyber, powering Project Perception — a red/blue/green agent platform entering public preview August 3. The model handles roughly 95% of vulnerability identification in MDASH, with complex tasks routed to GPT-5.4, and Microsoft claims ~50% cost savings over the current configuration. Separately, NVIDIA launched the Open Secure AI Alliance with 35+ members including Microsoft, Hugging Face, CrowdStrike, and Cloudflare, explicitly citing the Hugging Face incident as proof that open-weight models are defensive assets, not liabilities. NVIDIA is open-sourcing its NOOA agent auditing framework; Hugging Face is donating Safetensors to the PyTorch Foundation. [Read more](https://daily.dev/feed-by-ids?id=qbOp0DPJr&id=uHRiXAZgB) --- ## Also notable - **Nuxt security patches: critical RCE in DevTools, high-severity server RCE and cache disclosure fixed in 4.5.1 and 3.21.10:** Eight vulnerabilities patched across Nuxt 4.5.1, 3.21.10, and @nuxt/devtools 3.3.1 include an unauthenticated RCE via the Vite HMR socket in DevTools, a server-side RCE when vue.runtimeCompiler is enabled, a route rule auth bypass, and cross-user payload disclosure on cached pages in 4.x — upgrade immediately and purge CDN caches if you use authenticated pages with Nuxt caching. [Read more](https://daily.dev/posts/xdlBhO0fF) - **Certighost PoC (CVE-2026-54121): low-privileged domain user can DCSync via AD CS chase fallback abuse:** A released proof-of-concept lets any domain user supply attacker-controlled CDC and RMD values to redirect a CA to rogue SMB/LSA/LDAP services, obtain a DC-impersonating certificate via PKINIT, and retrieve krbtgt credentials; Microsoft patched in July 2026 Patch Tuesday, and admins who cannot patch can disable the chase fallback via certutil as a temporary workaround. [Read more](https://daily.dev/posts/jhtWvJxyO) - **Erlang/OTP triple patch release fixes heap corruption, TLS MITM, and zip path traversal across CVE-2026-55737, CVE-2026-55953, CVE-2026-47078:** OTP 27.3.4.15, 28.5.0.4, and 29.0.4 all address the same set of CVEs including heap corruption in ETF decoding, a TLS MITM for pre-TLS-1.3 clients, zip path traversal, and a DoS via crafted certificate chain policyMappings — update whichever branch you're on. [Read more](https://daily.dev/feed-by-ids?id=tyuObuzTj&id=mEkK8jwrC&id=07CJs8mRn) - **Hotel Wi-Fi DNS poisoning campaign steals Microsoft 365 OAuth tokens, bypassing MFA entirely:** ReliaQuest identified an active campaign since June where attackers compromise captive portal gateways via weak credentials, modify DNS to redirect M365 auth traffic, and harvest OAuth tokens via device-code flow abuse — bypassing MFA without touching the endpoint; enforce always-on full-tunnel VPN and block device-code auth flows in Entra ID as immediate mitigations. [Read more](https://daily.dev/posts/XHz3YP0CR) - **Coca-Cola confirms Fairlife ransomware data theft; Anubis gang published 1TB after ransom refusal:** Coca-Cola confirmed data was stolen from dairy subsidiary Fairlife by the Anubis ransomware gang, which has now published the data publicly after Coca-Cola refused to negotiate; most US production has resumed with product safety unaffected. [Read more](https://daily.dev/posts/LgUMAKl0o) ## Similar posts on daily.dev - [CISA: Ransomware gangs now exploiting critical TeamCity flaw](https://daily.dev/posts/cisa-ransomware-gangs-now-exploiting-critical-teamcity-flaw-ivphb8400) · BleepingComputer · 1 upvotes · 0 comments --- Tags: [#security](https://daily.dev/tags/security), [#cicd](https://daily.dev/tags/cicd), [#vulnerability](https://daily.dev/tags/vulnerability), [#ai-security](https://daily.dev/tags/ai-security) [View this post on daily.dev](https://daily.dev/posts/arista-velocloud-zero-day-exploited-in-the-wild-teamcity-critical-rce-needs-immediate-patching-gqcb2qqzr) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"DiscussionForumPosting","mainEntityOfPage":"https://daily.dev/posts/arista-velocloud-zero-day-exploited-in-the-wild-teamcity-critical-rce-needs-immediate-patching-gqcb2qqzr","headline":"Arista VeloCloud zero-day exploited in the wild, TeamCity critical RCE needs immediate patching","text":"CVE-2026-16812, a CVSS 10.0 unauthenticated command injection in Arista VeloCloud Orchestrator, is actively exploited with a CISA remediation deadline of July 30. 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