Cisco Unified Communications Manager Improper Access Control Vulnerability
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
An unauthenticated, remote attacker could bypass access controls on Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME). The flaw is improper input validation of specific HTTP requests, so a crafted HTTP request sent to an affected device could give the attacker access to parts of the network beyond their intended scope. The weakness is classified as CWE-749, and the CVSS 3.1 base score is 5.3 (MEDIUM).
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Description from the CNA
A vulnerability in 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 access control bypass attacks on an affected device. This vulnerability is due to improper input validation for specific HTTP requests. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected device. A successful exploit could allow the attacker to access parts of the network that are beyond the scope of their intended access.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- 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 | 14; 14SU1; 14SU2; 14SU3; 15; 15SU1; 14SU4; 14SU4a; 15SU1a; 15SU2; 15.0.1.13010-1; 15.0.1.13011-1; 15.0.1.13012-1; 15.0.1.13013-1; 15.0.1.13014-1; 15.0.1.13015-1; 15.0.1.13016-1; 15.0.1.13017-1; 15SU3a; 14SU5; 15SU4; 15SU4a; 14SU6 | — | No fix listed | CNA |
- Cisco Unified Communications Manager VendorCisco Affected 14; 14SU1; 14SU2; 14SU3; 15; 15SU1; 14SU4; 14SU4a; 15SU1a; 15SU2; 15.0.1.13010-1; 15.0.1.13011-1; 15.0.1.13012-1; 15.0.1.13013-1; 15.0.1.13014-1; 15.0.1.13015-1; 15.0.1.13016-1; 15.0.1.13017-1; 15SU3a; 14SU5; 15SU4; 15SU4a; 14SU6 Fixed in — No fix listed CNA
Remediation
The sources list no fixed version for the affected releases, so no update can be applied yet. Follow Cisco's guidance for when a fix becomes available.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Timeline
- 2026-10-21 Threatist record created from CVE-2026-76487
- 2026-10-21 Alias added: GHSA-r6hq-g55g-5h8h
- 2026-10-22 CISA SSVC decision points changed
References
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Sources
- CVE-2026-76487 · CVE Program
- CVE-2026-76487 · NVD
- FIRST EPSS
- GHSA-r6hq-g55g-5h8h · 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