CVE-2025-20343
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2025
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Cisco Identity Services Engine Radius Suppression Denial of Service Vulnerability
A vulnerability in the RADIUS setting Reject RADIUS requests from clients with repeated failures on Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to cause Cisco ISE to restart unexpectedly. This vulnerability is due to a logic error when processing a RADIUS access request for a MAC address that is already a rejected endpoint. An attacker could exploit this vulnerability by sending a specific sequence of multiple crafted RADIUS access request messages to Cisco ISE. A successful exploit could allow the attacker to cause a denial of service (DoS) condition when Cisco ISE restarts.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Cisco Identity Services Engine Software
- Vendor
- Cisco
- Product
- Cisco Identity Services Engine Software
- Platforms
- Unknown
- Default status
unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 3.4.0 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 3.4 Patch 1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 3.4 Patch 2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 3.4 Patch 3 | affected | Unavailable | Unavailable | Unavailable | None listed |