Cisco Unified Communications Products Cross-Site Request Forgery Vulnerability
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Tampering
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-352.
Summary
A vulnerability in the web-based management interface of Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager Session Management Edition (Unified CM SME), and Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P) could allow an unauthenticated, remote attacker to conduct a cross-site request forgery (CSRF) attack on an affected device. This vulnerability is due to insufficient CSRF protections for the web-based management interface on an affected device. An attacker could exploit this vulnerability by persuading a user of the interface to click a malicious link. A successful exploit could allow the attacker to perform arbitrary actions with the privilege level of the targeted user. These actions could include modifying the device configuration and deleting (but not creating) user accounts.
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 · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:cisco:unified_communications_manager:-:*:*:*:session_management:*:*:* | not specified by NVD | Vulnerable | Cisco |
| cpe:2.3:a:cisco:unified_communications_manager:14.0\(1.10000.20\):*:*:*:*:*:*:* | 14.0(1.10000.20) | Vulnerable | Cisco |
| cpe:2.3:a:cisco:unified_communications_manager_im_and_presence_service:10.5\(2\):*:*:*:*:*:*:* | 10.5(2) | Vulnerable | Cisco |
| cpe:2.3:a:cisco:unified_communications_manager_im_and_presence_service:11.5\(1\):*:*:*:*:*:*:* | 11.5(1) | Vulnerable | Cisco |
| cpe:2.3:a:cisco:unified_communications_manager_im_and_presence_service:12.5:*:*:*:*:*:*:* | 12.5 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:unified_communications_manager_im_and_presence_service:14.0:*:*:*:*:*:*:* | 14.0 | Vulnerable | Cisco |
- cpe:2.3:a:cisco:unified_communications_manager:-:*:*:*:session_management:*:*:* Versions not specified by NVD Vulnerable ·Cisco
- cpe:2.3:a:cisco:unified_communications_manager:14.0\(1.10000.20\):*:*:*:*:*:*:* Versions 14.0(1.10000.20) Vulnerable ·Cisco
- cpe:2.3:a:cisco:unified_communications_manager_im_and_presence_service:10.5\(2\):*:*:*:*:*:*:* Versions 10.5(2) Vulnerable ·Cisco
- cpe:2.3:a:cisco:unified_communications_manager_im_and_presence_service:11.5\(1\):*:*:*:*:*:*:* Versions 11.5(1) Vulnerable ·Cisco
- cpe:2.3:a:cisco:unified_communications_manager_im_and_presence_service:12.5:*:*:*:*:*:*:* Versions 12.5 Vulnerable ·Cisco
- cpe:2.3:a:cisco:unified_communications_manager_im_and_presence_service:14.0:*:*:*:*:*:*:* Versions 14.0 Vulnerable ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-34773
- 2026-10-03 Alias added: GHSA-rj22-gp23-c66j
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-2021-34773 · CVE Program
- CVE-2021-34773 · NVD
- FIRST EPSS
- GHSA-rj22-gp23-c66j · 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