CVE-2026-76423: CWE-290
Source GCVE Database
Not known to be exploited · CVSS 10.0 Critical.
Data as of 31 Oct 2026, 20:20 UTC
- EPSS
- 0.5% chance of exploitation in 30 days – higher than 47% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:LExploitation evidence
Disclosed: evidence found.
CVE published 16 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 31 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| CiscoCisco Identity Services Engine Software | Affected
| Fixed in– |
| CiscoCisco ISE Passive Identity Connector | Affected
| Fixed in– |
AI-suggested
Until a fix is available, restricting access to the REST API port and implementing network-level controls to limit exposure may reduce risk.
Description
A critical vulnerability exists in the REST API of Cisco ISE and Cisco ISE-PIC that allows unauthenticated remote attackers to gain administrative access. The flaw is due to insufficient authorization checks on the REST API web service, enabling attackers to send crafted HTTP requests to the exposed API port. Successful exploitation could lead to reading and modifying configuration and identity data with administrative privileges.