Cisco Unified Communications Manager Self Care Portal Authorization Bypass Vulnerability
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.
- Published
- Apr 8, 2021
- Updated
- Jun 16, 2026
- EPSS
- 0.6% · 47th percentile
- CWE
- CWE-302
Sign in to follow · You’ll be notified if a followed record enters KEV, gets an exploit or is updated.
Report tools
Action score
17
Monitor
Low priority for now.
- CVSS
- 17 / 40 · 4.3 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.6%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 4.3
- CNA · cisco
- 4.3
- agree
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| cisco | unified communications manager | cpe:2.3:a:cisco:unified_communications_manager |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- cisco unified communications manager10.5\(2\) and later · before 12.5\(1\)su4
Versions reported by the vendor
Affected version ranges reported by the assigning authority (cisco). Independent of NVD's CPE analysis and usually ahead of it.
Cisco Cisco Unified Communications Manager
- n/aaffected
Same product
cisco: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-20230Cisco Unified Communications Manager Server-Side Request Forgery VulnerabilityKEV90Now
- CVE-2026-20045Cisco Unified Communications Products Remote Code Execution VulnerabilityKEV70This week
- CVE-2024-20253A vulnerability in multiple Cisco Unified Communications and Contact Center Solutions products could allow an unauthenticated, remote attack41Plan
- CVE-2011-1643Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 6.x, 7.x before 7.1(5b)su4, 8.0, and 8.5 before 8.5(1)su2 and Cisco Un41Plan
- CVE-2025-20309Cisco Unified Communications Manager Static SSH Credentials Vulnerability40Plan
- CVE-2011-1609SQL injection vulnerability in Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 6.x before 6.1(5)su2, 7.x before 7.1(5)40Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
—
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
- CVE-2021-135578 days apartCisco Unified Communications Products Vulnerabilities26Monitor
- CVE-2021-135778 days apartCisco Unified Communications Products Vulnerabilities26Monitor
- CVE-2021-128278 days apartCisco Unified Communications Products Vulnerabilities19Monitor
- CVE-2021-136478 days apartCisco Unified Communications Products Vulnerabilities19Monitor
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- low · data or configuration can be modified
- Availability
- none
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- Low
- Availability impact
- None
Weakness class (CWE)
CWE-302 · Authentication Bypass by Assumed-Immutable DataCVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Buffer Overflow via Environment VariablesCAPEC-10likelihood: High · High
- Subverting Environment Variable ValuesCAPEC-13likelihood: High · Very High
- Exploitation of Trusted IdentifiersCAPEC-21likelihood: High · High
- HTTP Verb TamperingCAPEC-274Medium
- Accessing/Intercepting/Modifying HTTP CookiesCAPEC-31likelihood: High · High
- Manipulating Opaque Client-based Data TokensCAPEC-39likelihood: High · Medium
- Buffer Overflow via Symbolic LinksCAPEC-45likelihood: High · High
- Manipulating User-Controlled VariablesCAPEC-77likelihood: High · Very High
Change log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.