Cisco Unified Communications Manager Cross-Site Scripting Vulnerability
Key facts
- Attack vector
- Network
- Privileges required
- None
- 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 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
A vulnerability in the web UI of Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the interface. The vulnerability exists because the web UI does not properly validate user-supplied input. An attacker could exploit this vulnerability by persuading a user of the interface to click a crafted link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive browser-based information.
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 Unified Communications Manager | all versions | — | No fix listed | CNA |
- Cisco Unified Communications Manager VendorCisco Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:-:*:*:* | 10.5\(2\) – 10.5\(2\)su10 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:session_management:*:*:* | 10.5\(2\) – 10.5\(2\)su10 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:-:*:*:* | 11.5\(1\) – 11.5\(1\)su8 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:session_management:*:*:* | 11.5\(1\) – 11.5\(1\)su8 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:unified_communications_manager:12.0\(1\):*:*:*:-:*:*:* | 12.0(1) | Vulnerable | Cisco |
| cpe:2.3:a:cisco:unified_communications_manager:12.0\(1\):*:*:*:session_management:*:*:* | 12.0(1) | Vulnerable | Cisco |
| cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\):*:*:*:-:*:*:* | 12.5(1) | Vulnerable | Cisco |
| cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\):*:*:*:session_management:*:*:* | 12.5(1) | Vulnerable | Cisco |
- cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:-:*:*:* Versions 10.5\(2\) – 10.5\(2\)su10 Vulnerable ·Cisco
- cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:session_management:*:*:* Versions 10.5\(2\) – 10.5\(2\)su10 Vulnerable ·Cisco
- cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:-:*:*:* Versions 11.5\(1\) – 11.5\(1\)su8 Vulnerable ·Cisco
- cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:session_management:*:*:* Versions 11.5\(1\) – 11.5\(1\)su8 Vulnerable ·Cisco
- cpe:2.3:a:cisco:unified_communications_manager:12.0\(1\):*:*:*:-:*:*:* Versions 12.0(1) Vulnerable ·Cisco
- cpe:2.3:a:cisco:unified_communications_manager:12.0\(1\):*:*:*:session_management:*:*:* Versions 12.0(1) Vulnerable ·Cisco
- cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\):*:*:*:-:*:*:* Versions 12.5(1) Vulnerable ·Cisco
- cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\):*:*:*:session_management:*:*:* Versions 12.5(1) Vulnerable ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-3346
- 2026-10-03 Alias added: GHSA-v5vq-g662-p4fr
References
More Cisco Unified Communications Manager vulnerabilities
- TI-2026-16259 Cisco Unified Communications Products Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
- 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-2026-16423 Cisco Unified Communications Manager Server-Side Request Forgery Vulnerability KEVCVSS 3.1HIGH 8.6
- TI-2008-00019 Heap-based buffer overflow in the Certificate Trust List (CTL) Provider service… CVSS 2.0HIGH 10.0
- TI-2013-05779 The TFTP service in Cisco Unified Communications Manager (aka CUCM or Unified CM) allows… CVSS 3.1HIGH 7.3
- TI-2011-02932 Directory traversal vulnerability in Cisco Unified Communications Manager (CUCM) 5.x and… CVSS 2.0HIGH 7.8
Sources
- CVE-2020-3346 · CVE Program
- CVE-2020-3346 · NVD
- FIRST EPSS
- GHSA-v5vq-g662-p4fr · 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