CVE-2026-76466Critical· 9.8▾ AbyssalPoC availableA vulnerability in the database service feature of Cisco Expressway Series could allow an unauthenticated, remote attacker with network access to a Cisco Expressway device to execute arbitrary operating system commands as root. T…
▾ Abyssal zone — Critical with a public exploit or in-the-wild use
impact 53.9 · likelihood 0.1 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Public exploit / PoC code seen in 1 source. Availability, not in-the-wild use.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Oct 23.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.4%
0.4% → 0.4%
1 GitHub repo
A vulnerability in the database service feature of Cisco Expressway Series could allow an unauthenticated, remote attacker with network access to a Cisco Expressway device to execute arbitrary operating system commands as root.
This vulnerability is due to the use of persistent cookies. Additionally, there is insufficient validation of client certificates when the TLS Verify Mode is set to Enabled for clustering, which means that client certificates are not validated. An attacker with possession of the cookies could exploit this vulnerability by connecting to the database service and invoking specific remote procedure call (RPC) commands. A successful exploit could allow the attacker to execute arbitrary commands as root on the underlying operating system of an affected device. Note: Cisco Expressway Series refers to Cisco Expressway Core (Expressway-C) devices and Cisco Expressway Edge (Expressway-E) devices.
telepresence_video_communication_server_vcs_expressway X8.11.2telepresence_video_communication_server_vcs_expressway X8.6telepresence_video_communication_server_vcs_expressway X8.11.3telepresence_video_communication_server_vcs_expressway X8.2.2telepresence_video_communication_server_vcs_expressway X8.8.3telepresence_video_communication_server_vcs_expressway X8.11.0telepresence_video_communication_server_vcs_expressway X12.5.2telepresence_video_communication_server_vcs_expressway X8.1.1telepresence_video_communication_server_vcs_expressway X8.9telepresence_video_communication_server_vcs_expressway X12.5.1telepresence_video_communication_server_vcs_expressway X12.5.6telepresence_video_communication_server_vcs_expressway X8.7.3telepresence_video_communication_server_vcs_expressway X12.6.0telepresence_video_communication_server_vcs_expressway X8.11.1telepresence_video_communication_server_vcs_expressway X8.5telepresence_video_communication_server_vcs_expressway X8.9.1telepresence_video_communication_server_vcs_expressway X8.10.2telepresence_video_communication_server_vcs_expressway X8.8.2telepresence_video_communication_server_vcs_expressway X8.5.3telepresence_video_communication_server_vcs_expressway X8.1telepresence_video_communication_server_vcs_expressway X8.9.2telepresence_video_communication_server_vcs_expressway X8.11.4telepresence_video_communication_server_vcs_expressway X12.5.4telepresence_video_communication_server_vcs_expressway X8.8.1telepresence_video_communication_server_vcs_expressway X8.2.1telepresence_video_communication_server_vcs_expressway X8.5.1telepresence_video_communication_server_vcs_expressway X8.6.1telepresence_video_communication_server_vcs_expressway X8.1.2telepresence_video_communication_server_vcs_expressway X8.8telepresence_video_communication_server_vcs_expressway X8.10.0telepresence_video_communication_server_vcs_expressway X12.5.3telepresence_video_communication_server_vcs_expressway X8.10.1telepresence_video_communication_server_vcs_expressway X12.5.7telepresence_video_communication_server_vcs_expressway X8.10.3telepresence_video_communication_server_vcs_expressway X8.7.1telepresence_video_communication_server_vcs_expressway X8.2telepresence_video_communication_server_vcs_expressway X12.5.8telepresence_video_communication_server_vcs_expressway X8.7telepresence_video_communication_server_vcs_expressway X8.5.2telepresence_video_communication_server_vcs_expressway X12.5.9telepresence_video_communication_server_vcs_expressway X12.5.0telepresence_video_communication_server_vcs_expressway X8.10.4telepresence_video_communication_server_vcs_expressway X8.7.2telepresence_video_communication_server_vcs_expressway X12.5.5telepresence_video_communication_server_vcs_expressway X12.6.1telepresence_video_communication_server_vcs_expressway X12.6.2telepresence_video_communication_server_vcs_expressway X12.6.3telepresence_video_communication_server_vcs_expressway X12.6.4telepresence_video_communication_server_vcs_expressway X12.7.0telepresence_video_communication_server_vcs_expressway X12.7.1Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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