CVE-2026-20237 Cisco Identity Services Engine Hardening Release - Input Validation Vulnerabilities
Cisco ISE and ISE-PIC contain multiple improper input validation vulnerabilities addressed in a hardening release.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-20237?
CVE-2026-20237 is a critical vulnerability in Cisco ISE Passive Identity Connector, published on 16 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC), engineering teams have conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20237 are related to improper input validation issues that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-20.
Weakness: CWE-20
Which versions are affected by CVE-2026-20237?
How do I fix CVE-2026-20237?
No fix has been published for CVE-2026-20237 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-20237 being exploited?
There is no known exploitation of CVE-2026-20237 in the wild and no public exploit code.
Sources
Also known as GHSA-8h74-5vrg-hj96.