Cisco Identity Services Engine Stored Cross-Site Scripting Vulnerabilities
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.
Summary
Multiple vulnerabilities in the web-based management interface of Cisco Identity Services Engine (ISE) could allow an authenticated, remote attacker with administrative credentials to conduct a cross-site scripting (XSS) attack against a user of the interface. These vulnerabilities are due to insufficient validation of user-supplied input that is processed by the web-based management interface. An attacker could exploit these vulnerabilities by injecting malicious code into specific pages of the interface. A successful exploit could allow the attacker to execute arbitrary script code in the context of the interface or access sensitive, browser-based information. To exploit these vulnerabilities, an attacker would need valid administrative credentials.
Why it matters now
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 | all versions | — | No fix listed | CNA |
- Cisco Identity Services Engine Software VendorCisco Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:cisco:identity_services_engine:*:*:*:*:*:*:*:* | before 2.6.0 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:identity_services_engine:2.6.0:-:*:*:*:*:*:* | 2.6.0 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:identity_services_engine:2.6.0:patch1:*:*:*:*:*:* | 2.6.0 patch1 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:identity_services_engine:2.6.0:patch2:*:*:*:*:*:* | 2.6.0 patch2 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:identity_services_engine:2.6.0:patch3:*:*:*:*:*:* | 2.6.0 patch3 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:identity_services_engine:2.6.0:patch5:*:*:*:*:*:* | 2.6.0 patch5 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:identity_services_engine:2.6.0:patch6:*:*:*:*:*:* | 2.6.0 patch6 | Vulnerable | Cisco |
- cpe:2.3:a:cisco:identity_services_engine:*:*:*:*:*:*:*:* Versions before 2.6.0 Vulnerable ·Cisco
- cpe:2.3:a:cisco:identity_services_engine:2.6.0:-:*:*:*:*:*:* Versions 2.6.0 Vulnerable ·Cisco
- cpe:2.3:a:cisco:identity_services_engine:2.6.0:patch1:*:*:*:*:*:* Versions 2.6.0 patch1 Vulnerable ·Cisco
- cpe:2.3:a:cisco:identity_services_engine:2.6.0:patch2:*:*:*:*:*:* Versions 2.6.0 patch2 Vulnerable ·Cisco
- cpe:2.3:a:cisco:identity_services_engine:2.6.0:patch3:*:*:*:*:*:* Versions 2.6.0 patch3 Vulnerable ·Cisco
- cpe:2.3:a:cisco:identity_services_engine:2.6.0:patch5:*:*:*:*:*:* Versions 2.6.0 patch5 Vulnerable ·Cisco
- cpe:2.3:a:cisco:identity_services_engine:2.6.0:patch6:*:*:*:*:*:* Versions 2.6.0 patch6 Vulnerable ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-3340
- 2026-10-03 Alias added: GHSA-m2c7-382p-h66r
- 2026-11-06 EPSS moved to the 50th–90th percentile
References
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-2020-3340 · CVE Program
- CVE-2020-3340 · NVD
- FIRST EPSS
- GHSA-m2c7-382p-h66r · 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