Cisco Identity Services Engine Authentication Bypass Vulnerability
Priority LOW 19CWE-862Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-862.
Summary
A vulnerability in the RADIUS Policy API endpoints of Cisco ISE could allow an authenticated, remote attacker with read-only Administrator privileges to gain unauthorized access to sensitive information on an affected device. This vulnerability is due to improper role-based access control (RBAC) permissions on the RADIUS Policy API endpoints. An attacker could exploit this vulnerability by bypassing the web-based management interface and directly calling an affected endpoint. A successful exploit could allow the attacker to gain unauthorized read access to sensitive RADIUS Policy details that are restricted for their role.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00221 12th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Cisco | Cisco Identity Services Engine Software | 3.3.0; 3.3 Patch 2; 3.3 Patch 1; 3.3 Patch 3; 3.4.0; 3.3 Patch 4; 3.4 Patch 1; 3.3 Patch 5; 3.3 Patch 6; 3.4 Patch 2; 3.3 Patch 7; 3.4 Patch 3; 3.5.0; 3.4 Patch 4; 3.3 Patch 8; 3.5 Patch 1; 3.3 Patch 9; 3.4 Patch 5; 3.5 Patch 3; 3.5 Patch 2; 3.3 Patch 10 | — | No fix listed | CNA |
- Cisco Identity Services Engine Software VendorCisco Affected 3.3.0; 3.3 Patch 2; 3.3 Patch 1; 3.3 Patch 3; 3.4.0; 3.3 Patch 4; 3.4 Patch 1; 3.3 Patch 5; 3.3 Patch 6; 3.4 Patch 2; 3.3 Patch 7; 3.4 Patch 3; 3.5.0; 3.4 Patch 4; 3.3 Patch 8; 3.5 Patch 1; 3.3 Patch 9; 3.4 Patch 5; 3.5 Patch 3; 3.5 Patch 2; 3.3 Patch 10 Fixed in — No fix listed CNA
CPE configurations NVD · 21
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:cisco:identity_services_engine:*:*:*:*:*:*:*:* | up to 3.2.0 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:identity_services_engine:3.3.0:-:*:*:*:*:*:* | 3.3.0 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch1:*:*:*:*:*:* | 3.3.0 patch1 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch10:*:*:*:*:*:* | 3.3.0 patch10 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch2:*:*:*:*:*:* | 3.3.0 patch2 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch3:*:*:*:*:*:* | 3.3.0 patch3 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch4:*:*:*:*:*:* | 3.3.0 patch4 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch5:*:*:*:*:*:* | 3.3.0 patch5 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch6:*:*:*:*:*:* | 3.3.0 patch6 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch7:*:*:*:*:*:* | 3.3.0 patch7 | Vulnerable | Cisco |
- cpe:2.3:a:cisco:identity_services_engine:*:*:*:*:*:*:*:* Versions up to 3.2.0 Vulnerable ·Cisco
- cpe:2.3:a:cisco:identity_services_engine:3.3.0:-:*:*:*:*:*:* Versions 3.3.0 Vulnerable ·Cisco
- cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch1:*:*:*:*:*:* Versions 3.3.0 patch1 Vulnerable ·Cisco
- cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch10:*:*:*:*:*:* Versions 3.3.0 patch10 Vulnerable ·Cisco
- cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch2:*:*:*:*:*:* Versions 3.3.0 patch2 Vulnerable ·Cisco
- cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch3:*:*:*:*:*:* Versions 3.3.0 patch3 Vulnerable ·Cisco
- cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch4:*:*:*:*:*:* Versions 3.3.0 patch4 Vulnerable ·Cisco
- cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch5:*:*:*:*:*:* Versions 3.3.0 patch5 Vulnerable ·Cisco
- cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch6:*:*:*:*:*:* Versions 3.3.0 patch6 Vulnerable ·Cisco
- cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch7:*:*:*:*:*:* Versions 3.3.0 patch7 Vulnerable ·Cisco
Show 11 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch8:*:*:*:*:*:* | 3.3.0 patch8 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch9:*:*:*:*:*:* | 3.3.0 patch9 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:identity_services_engine:3.4.0:-:*:*:*:*:*:* | 3.4.0 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch1:*:*:*:*:*:* | 3.4.0 patch1 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch2:*:*:*:*:*:* | 3.4.0 patch2 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch3:*:*:*:*:*:* | 3.4.0 patch3 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch4:*:*:*:*:*:* | 3.4.0 patch4 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch5:*:*:*:*:*:* | 3.4.0 patch5 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:identity_services_engine:3.5.0:-:*:*:*:*:*:* | 3.5.0 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:identity_services_engine:3.5.0:patch1:*:*:*:*:*:* | 3.5.0 patch1 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:identity_services_engine:3.5.0:patch2:*:*:*:*:*:* | 3.5.0 patch2 | Vulnerable | Cisco |
- cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch8:*:*:*:*:*:* Versions 3.3.0 patch8 Vulnerable ·Cisco
- cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch9:*:*:*:*:*:* Versions 3.3.0 patch9 Vulnerable ·Cisco
- cpe:2.3:a:cisco:identity_services_engine:3.4.0:-:*:*:*:*:*:* Versions 3.4.0 Vulnerable ·Cisco
- cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch1:*:*:*:*:*:* Versions 3.4.0 patch1 Vulnerable ·Cisco
- cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch2:*:*:*:*:*:* Versions 3.4.0 patch2 Vulnerable ·Cisco
- cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch3:*:*:*:*:*:* Versions 3.4.0 patch3 Vulnerable ·Cisco
- cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch4:*:*:*:*:*:* Versions 3.4.0 patch4 Vulnerable ·Cisco
- cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch5:*:*:*:*:*:* Versions 3.4.0 patch5 Vulnerable ·Cisco
- cpe:2.3:a:cisco:identity_services_engine:3.5.0:-:*:*:*:*:*:* Versions 3.5.0 Vulnerable ·Cisco
- cpe:2.3:a:cisco:identity_services_engine:3.5.0:patch1:*:*:*:*:*:* Versions 3.5.0 patch1 Vulnerable ·Cisco
- cpe:2.3:a:cisco:identity_services_engine:3.5.0:patch2:*:*:*:*:*:* Versions 3.5.0 patch2 Vulnerable ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-20193
- 2026-10-03 Alias added: GHSA-qwrq-5c2q-3p3m
References
Advisory 1
More Cisco Identity Services Engine vulnerabilities
- TI-2026-53488 Cisco Identity Services Engine Authentication Bypass Vulnerability KEVCVSS 3.1CRITICAL 10.0
- TI-2025-14632 Cisco ISE API Unauthenticated Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 10.0
- TI-2025-14578 Cisco ISE API Unauthenticated Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 10.0
- TI-2021-19919 Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints KEVCVSS 3.1CRITICAL 10.0
- TI-2025-14579 Cisco ISE API Unauthenticated Remote Code Execution Vulnerability CVSS 3.1CRITICAL 10.0
- TI-2022-05522 OS command injection in Cisco Identity Services Engine Software CVSS 3.1HIGH 8.8
Sources
- CVE-2026-20193 · CVE Program
- CVE-2026-20193 · NVD
- FIRST EPSS
- GHSA-qwrq-5c2q-3p3m · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences