CVE-2023-20116

FAUCET Score

CVE-2023-20116 is a denial of service (DoS) vulnerability affecting Cisco Unified Communications Manager (Unified CM) and Unified CM Session Management Edition (SME). The flaw stems from insufficient input validation in the Administrative XML Web Service (AXL) API, specifically within the Self Care Portal's web UI. An authenticated, remote attacker can exploit this by sending crafted HTTP input, leading to a DoS condition on the affected device. Rated as Medium severity with a CVSS score of 5.7, this vulnerability requires user interaction (UI:R) and low privileges (PR:L) for exploitation. While the attack complexity is low (AC:L), the primary impact is limited to availability (A:H), with no confidentiality or integrity impact. Currently, there is no evidence of active exploitation, and no public exploit code (Metasploit, Nuclei, ExploitDB) is available. Community discussion and media coverage for this CVE are minimal, indicating a low level of public attention.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		11.5\(1.10000.6\)CPE matchmatch criteria	cpe:2.3:a:cisco:unified_communications_manager:11.5\(1.10000.6\):::::::*
		11.5\(1.10000.6\)CPE matchmatch criteria	cpe:2.3:a:cisco:unified_communications_manager:11.5\(1.10000.6\)::::session_management:::
		12.0\(1.10000.10\)CPE matchmatch criteria	cpe:2.3:a:cisco:unified_communications_manager:12.0\(1.10000.10\):::::::*
		12.0\(1.10000.10\)CPE matchmatch criteria	cpe:2.3:a:cisco:unified_communications_manager:12.0\(1.10000.10\)::::session_management:::
		12.5\(1.10000.22\)CPE matchmatch criteria	cpe:2.3:a:cisco:unified_communications_manager:12.5\(1.10000.22\):::::::*

CVSS Data

CVSS version used by this source: 3.1

6.8MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

Exploitability Score

2.3

Impact Score

4.0

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.60%

Probability of exploitation in next 30 days

EPSS Percentile

45.3%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.0060 is in the 75th percentile among its peer group of 15,239 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference

View patch

References

sec.cloudapps.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-cucm-dos-4Ag3yWbD

Vendor Advisory