CVE-2019-1837

highpriority · track · 31EPSS 0.024 · 84 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

2.44% (84th) EPSS

CVSS 7.8 · high

Is it mine?

13 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cisco_csaf

EPSS · scored 2026-10-27

A vulnerability in the User Data Services (UDS) API of Cisco Unified Communications Manager (Unified CM) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on the management GUI. The vulnerability is due to improper validation of input parameters in the UDS API requests. An attacker could exploit this vulnerability by sending a crafted request to the UDS API of an affected device. A successful exploit could allow the attacker to make the A Cisco DB service quit unexpectedly, preventing admin access to the Unified CM management GUI. Manual intervention may be required to restore normal operation. Software versions 10.5, 11.5, 12.0, 12.5 are affected.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedCisco Unified Communications Managercisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.3–7.8

v2.07.8highAV:N/AC:L/Au:N/C:N/I:N/A:Cprimary · NVD / NIST USexploitability 10 · impact 6.9

v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.05.3mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · ENISA EU

v3.05.3mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · Cisco PSIRT US

v3.05.3mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · psirt@cisco.com USexploitability 3.9 · impact 1.4

v3.06.9mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USprimaryCWE-129USCWE-20US

affected products (13)

Products and version ranges known to be affected.

Cisco Cisco Unified Communications Managerall versionscisco_csafUS
Cisco Cisco Unified Communications Manager≤ 12.5enisa_euvdEU
Cisco Cisco Unified Communications Manager≤ 11.5enisa_euvdEU
Cisco Cisco Unified Communications Manager≤ 10.5enisa_euvdEU
Cisco Cisco Unified Communications Manager≤ 12.0enisa_euvdEU
Cisco Systems Inc. Cisco Unified Communications Manager≤ 12.5fstec_bduRU
Cisco Systems Inc. Cisco Unified Communications Manager≤ 12.0fstec_bduRU
Cisco Systems Inc. Cisco Unified Communications Manager≤ 11.5fstec_bduRU
Cisco Systems Inc. Cisco Unified Communications Manager≤ 10.5fstec_bduRU
cisco unified communications manager= 10.5(2.10000.5)nvdUScpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:*:*:*:*
cisco unified communications manager= 11.5(1.10000.6)nvdUScpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:*:*:*:*
cisco unified communications manager= 12.0(1.10000.10)nvdUScpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:*:*:*:*
cisco unified communications manager= 12.5(1.10000.22)nvdUScpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

cisco-sa-20190417-ucm-dosCisco Unified Communications Manager Denial of Service Vulnerability2019-04-17csaf · cisco_csafUS
A vulnerability in the User Data Services (UDS) API of Cisco Unified Communications Manager (Unified CM) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on the management GUI. The vulnerability is due to improper validation of input parameters in the UDS API requests. An attacker could exploit this vulnerability by sending a crafted request to the UDS API of an affected device. A successful exploit could allow the attacker to make the A Cisco DB service quit unexpectedly, preventing admin access to the Unified CM management GUI. Manual intervention may be required to restore normal operation. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190417-ucm-dos ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190417-ucm-dos"]

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cisco_csaf nvd NVD CVE.org MITRE

published 2019-04-18modified 2026-06-17

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+25188 more

references (12)

External citations — patches, advisories, analysis.

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