CVE-2019-12634

mediumpriority · track · 31OT risk · elevatedEPSS 0.020 · 81 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

2.05% (81st) EPSS

CVSS 5 · medium

Is it mine?

18 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 web-based management interface of Cisco Integrated Management Controller (IMC) Supervisor, Cisco UCS Director, and Cisco UCS Director Express for Big Data could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to a missing authentication check in an API call. An attacker who can send a request to an affected system could cause all currently authenticated users to be logged off. Repeated exploitation could cause the inability to maintain a session in the web-based management portal.

remediations

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

A vendor fix is available.

FixedCisco Integrated Management Controller (IMC) Supervisorcisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco UCS Directorcisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Unified Computing System Director Express for Big Data cisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com

cvss

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

8.6

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–8.6

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.08.6highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · ENISA EU

v3.08.6highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · psirt@cisco.com USexploitability 3.9 · impact 4

v3.08.6highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · Cisco PSIRT US

v3.18.6highAV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

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-306USprimaryCWE-264USCWE-264US

affected products (18)

Products and version ranges known to be affected.

Cisco Cisco Integrated Management Controller (IMC) Supervisorall versionscisco_csafUS
Cisco Cisco UCS Directorall versionscisco_csafUS
Cisco Cisco Unified Computing System Director Express for Big Data all versionscisco_csafUS
Cisco Cisco Unified Computing System Directorunspecified → 6.7.3.0enisa_euvdEU
Cisco Systems Inc. Integrated Management Controller (IMC) Supervisor2.2.0.3 → 2.2.0.6fstec_bduRU
Cisco Systems Inc. UCS Director≤ 6.6.1.0fstec_bduRU
Cisco Systems Inc. UCS Director≤ 6.6.0.0fstec_bduRU
Cisco Systems Inc. UCS Director6.7.0.0 → 6.7.2.0fstec_bduRU
Cisco Systems Inc. UCS Director Express for Big Data≤ 3.6.0.0fstec_bduRU
Cisco Systems Inc. UCS Director Express for Big Data≤ 3.6.1.0fstec_bduRU
Cisco Systems Inc. UCS Director Express for Big Data3.7.0.0 → 3.7.2.0fstec_bduRU
cisco integrated management controller supervisor2.2.0.3 → 2.2.0.6nvdUScpe:2.3:a:cisco:integrated_management_controller_supervisor:*:*:*:*:*:*:*:*
cisco ucs director= 6.6.0.0nvdUScpe:2.3:a:cisco:ucs_director:*:*:*:*:*:*:*:*
cisco ucs director= 6.6.1.0nvdUScpe:2.3:a:cisco:ucs_director:*:*:*:*:*:*:*:*
cisco ucs director6.7.0.0 → 6.7.2.0nvdUScpe:2.3:a:cisco:ucs_director:*:*:*:*:*:*:*:*
cisco ucs director express for big data= 3.6.0.0nvdUScpe:2.3:a:cisco:ucs_director_express_for_big_data:*:*:*:*:*:*:*:*
cisco ucs director express for big data= 3.6.1.0nvdUScpe:2.3:a:cisco:ucs_director_express_for_big_data:*:*:*:*:*:*:*:*
cisco ucs director express for big data3.7.0.0 → 3.7.2.0nvdUScpe:2.3:a:cisco:ucs_director_express_for_big_data:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

cisco-sa-20190821-ucs-imc-dosCisco Integrated Management Controller Supervisor, Cisco UCS Director, and Cisco UCS Director Express for Big Data Denial of Service Vulnerability2019-08-21csaf · cisco_csafUS
A vulnerability in the web-based management interface of Cisco Integrated Management Controller (IMC) Supervisor, Cisco UCS Director, and Cisco UCS Director Express for Big Data could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to a missing authentication check in an API call. An attacker who can send a request to an affected system could cause all currently authenticated users to be logged off. Repeated exploitation could cause the inability to maintain a session in the web-based management portal. Cisco has released software updates that address this vulnerability. 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-20190821-ucs-imc-dos ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190821-ucs-imc-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 2019-08-21modified 2026-06-17

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references (20)

External citations — patches, advisories, analysis.

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