CVE-2021-1399

Cisco Unified Communications Manager Self Care Portal Authorization Bypass Vulnerability

MEDIUM
4.3
CVSS Score
Published: April 8, 2021 at 04:05 AM UTC
Updated: June 17, 2026 at 03:31 AM UTC
1 product affected across 1 vendorUnified Communications Manager

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

Description

A vulnerability in the Self Care Portal of Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an authenticated, remote attacker to modify data on an affected system without proper authorization. The vulnerability is due to insufficient validation of user-supplied data to the Self Care Portal. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected system. A successful exploit could allow the attacker to modify information without proper authorization.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

10.5\(2\) ≤ v < 12.5\(1\)su4
Affected range stops below 12.5(1)su4, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.3MEDIUMcisco
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-302

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