CVE Intelligence
Medium Injection

CVE-2026-20036 — Cisco UCS Manager Software Command Injection Vulnerability

A vulnerability in the CLI and web-based management interface of Cisco UCS Manager Software could allow an authenticated, remote attacker with valid administrative privileges to execute arbitrary commands on the underlying operating system of an affected device.    This vulnerability is due to insufficient input validation of command arguments that are supplied by the user. An attacker could exploit this vulnerability by authenticating to a device and submitting crafted input to the affected command. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system of an affected device with root-level privileges.

Published Feb 25, 2026 · Updated Oct 13, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: cisco

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.
How the score was calculated
  • EPSS 0.5% (30-day exploitation probability)+6
  • Technical severity (medium)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation
Not confirmed
Not in CISA KEV — an absence of record, not proof it is unexploited.
EPSS FIRST
0.46%
ahead of 38% of scored CVEs · Oct 14, 2026
Affects
Cisco
Cisco Unified Computing System (Managed)
CVSS base
6.5
Medium · 2 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation
None
none · proof-of-concept · active
Automatable
No
can an attacker script the kill-chain steps
Technical impact
Total
partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

  1. Identify exposed assets running the affected vendor/product/version combinations (Cisco Cisco Unified Computing System (Managed)).
  2. No fix documented in the sources: reduce exposure and monitor the vendor advisory.
  3. Search available logs for exploit probes matching the vulnerability class (injection), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

VendorProductVersionsStatusSource
Cisco Cisco Unified Computing System (Managed) version 4.2(3h)version 4.3(4c)version 4.3(4b)version 4.2(3k)version 4.3(4a)version 4.3(3c)version 4.2(3j)version 4.3(3a)
and 87 more version 4.3(2e)version 4.1(3m)version 4.3(2c)version 4.2(3i)version 4.2(3l)version 4.3(2b)version 4.1(3l)version 4.2(3g)version 4.2(3e)version 4.2(3d)version 4.2(2e)version 4.0(4o)version 4.1(3k)version 4.2(3b)version 4.2(2d)version 4.2(2c)version 4.3(6a)version 6.0(1f)version 4.3(6e)version 6.0(1e)version 6.0(1d)version 4.3(6d)version 6.0(1c)version 4.2(3p)version 6.0(1b)version 4.3(6c)version 4.3(5e)version 4.3(6b)version 4.1(3j)version 4.3(5d)version 4.2(3o)version 4.3(5c)version 4.2(3n)version 4.3(4f)version 4.1(3n)version 4.3(4e)version 4.3(5a)version 4.2(3m)version 4.3(2f)version 4.3(4d)version 4.0(1b)version 4.1(2b)version 4.1(1e)version 4.0(4i)version 4.1(1d)version 4.1(2a)version 4.0(4b)version 4.0(4e)version 4.0(4d)version 4.1(1b)version 4.0(2d)version 4.0(2b)version 4.0(4k)version 4.0(4f)version 4.0(4c)version 4.0(2e)version 4.0(4g)version 4.0(2a)version 4.1(1c)version 4.0(1d)version 4.0(1a)version 4.0(4a)version 4.0(1c)version 4.1(1a)version 4.1(3e)version 4.2(1n)version 4.2(2a)version 4.1(3i)version 4.2(1m)version 4.0(4n)version 4.2(1l)version 4.2(1k)version 4.1(3h)version 4.2(1i)version 4.1(3f)version 4.2(1f)version 4.0(4h)version 4.0(4m)version 4.2(1d)version 4.2(1c)version 4.1(3d)version 4.1(3c)version 4.1(4a)version 4.0(4l)version 4.1(2c)version 4.1(3b)version 4.1(3a)
Vulnerable CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector
Network
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

ScoreVersionSeverityExpl.ImpactScored by
6.5 CVSS 3.1 Medium 1.2 5.2 psirt@cisco.com via NIST National Vulnerability Database
6.5 CVSS 3.1 Medium — — cisco via CVE Program (cve.org) e CISA ADP
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N (score shown at the top: psirt@cisco.com)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-78 · OS Command Injection

Other CVEs with this weakness →

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 0.46%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

  • Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
  • Look for parameters with command/query metacharacters and unexpected child processes of the service.
web/proxy/WAF logsnetwork IDS/IPSapplication logsendpoint telemetry (EDR)

Timeline

What happened to this CVE, newest first.

  • 2026
  • Affected products added · cisco/cisco unified computing system (managed)
    Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
  • SSVC assessment updated
    Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
  • Record published
    Oct 13, 2026
  • CVSS changed · 6.5
    Oct 13, 2026 · NIST National Vulnerability Database
  • Source status changed · → Deferred
    Oct 13, 2026 · NIST National Vulnerability Database
  • Record created in this database
    Oct 13, 2026 · NIST National Vulnerability Database
  • CVE published
    Feb 25, 2026 · cisco

Source activity

Repeated readings are counted rather than listed.

  • 1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

1 on the record

Elsewhere on this site

Cisco
every CVE for this vendor
Injection
same class
CWE-78
other pages naming this weakness

Related CVEs (same products)

  • CVE-2026-76471 Cisco NX-OS Software NX-API Remote Code Execution Vulnerability 8d
  • CVE-2026-76457 Cisco NX-OS Software Security Hardening Release: October 2026 - Out-of-bounds Read Vulnerabilities 8d
  • CVE-2026-76458 Cisco NX-OS Software Security Hardening Release: October 2026 - Improper Handling of Exceptional Conditions Vulnerabilities 8d
  • CVE-2026-76459 Cisco NX-OS Software Security Hardening Release: October 2026 - Out-of-bounds Write Vulnerabilities 8d
  • CVE-2026-76455 Cisco NX-OS Software Security Hardening Release: October 2026 - Improper Access Control Vulnerabilities 8d
  • CVE-2026-76453 Cisco NX-OS Software Security Hardening Release: October 2026 - Improper Neutralization Vulnerabilities 8d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No fixed version, patch or mitigation documented.
  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-20036 is "Cisco UCS Manager Software Command Injection Vulnerability", rated Medium. It affects Cisco Unified Computing System (Managed) (Cisco); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 6.5 describes technical severity. EPSS 0.46% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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