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CVE-2026-76466

9.8 critical exploit SSVC exploitation: none Published
NVD · CVE.org

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.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Public exploits 1

Each line links to the index that lists it, never to exploit code. Exploit-DB's "verified" and a Metasploit rank of good or better count as verified; a PoC-in-GitHub entry is a repository's claim.

Change history 8

  1. StatusAwaiting Analysis → PublishedNVD modified 2026-10-22 23:04
  2. StatusPublished → Awaiting AnalysisNVD modified 2026-10-22 23:19
  3. StatusAwaiting Analysis → PublishedNVD modified 2026-10-21 17:19
  4. StatusPublished → Awaiting AnalysisNVD modified 2026-10-21 18:54
  5. StatusReceived → PublishedNVD modified 2026-10-21 17:19
  6. StatusPublished → ReceivedNVD modified 2026-10-21 18:17
  7. StatusReceived → PublishedNVD modified 2026-10-21 16:14
  8. First seenCVSS 9.8NVD modified 2026-10-21 17:19

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 1