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CVE-2019-1837

25
FAUCET Score

CVE-2019-1837 is a denial-of-service vulnerability in the User Data Services (UDS) API of Cisco Unified Communications Manager (Unified CM) versions 10.5, 11.5, 12.0, and 12.5. An unauthenticated, remote attacker can exploit improper input validation to crash the A Cisco DB service, preventing administrative access to the management GUI. With a CVSS score of 7.5 (HIGH), this vulnerability is easily exploitable over the network with no user interaction, leading to a complete loss of availability for the management interface. There is currently no public exploit code available, it is not listed in the KEV catalog, and it has received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
10.5\(2.10000.5\)CPE matchmatch criteria
cpe:2.3:a:cisco:unified_communications_manager:10.5\(2.10000.5\):*:*:*:*:*:*:*
11.5\(1.10000.6\)CPE matchmatch criteria
cpe:2.3:a:cisco:unified_communications_manager:11.5\(1.10000.6\):*:*:*:*:*:*:*
12.0\(1.10000.10\)CPE matchmatch criteria
cpe:2.3:a:cisco:unified_communications_manager:12.0\(1.10000.10\):*:*:*:*:*:*:*
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: 3.0

5.3MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.44%
Probability of exploitation in next 30 days
EPSS Percentile
82.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0244 is in the 69th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-20190417-ucm-dos
Vendor Advisory
securityfocus.com / bid/108019
Third Party AdvisoryVDB Entry