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CVE-2026-20099

Cisco UCS Manager and FXOS Software Command Injection Vulnerability

MEDIUM
6.7
CVSS Score
Published: February 25, 2026 at 04:25 PM UTC
Updated: June 17, 2026 at 10:17 AM UTC
3 products affected across 1 vendorAdaptive Security ApplianceUnified Computing SystemFirepower Extensible Operating System

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Severity
MEDIUM6.7
Exploit prediction
EPSS 0.7%
SSVC
No known exploit

Description

A vulnerability in the web-based management interface of Cisco FXOS Software and Cisco UCS Manager Software could allow an authenticated, local attacker with administrative privileges to perform command injection attacks on an affected system and elevate privileges to root.  This vulnerability is due to insufficient input validation of command arguments 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 the affected device with root-level privileges.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Adaptive Security Appliance· Cisco
60%
9.12.19.12.1.29.12.1.39.12.29.12.2.19.12.2.59.12.2.99.12.39.12.3.129.12.3.29.12.3.79.12.3.99.12.49.12.4.109.12.4.139.12.4.189.12.4.29.12.4.249.12.4.269.12.4.299.12.4.309.12.4.359.12.4.379.12.4.389.12.4.399.12.4.49.12.4.409.12.4.419.12.4.479.12.4.489.12.4.509.12.4.529.12.4.549.12.4.559.12.4.569.12.4.589.12.4.629.12.4.659.12.4.679.12.4.79.12.4.89.16.19.16.1.289.16.29.16.2.119.16.2.139.16.2.149.16.2.39.16.2.79.16.39.16.3.149.16.3.159.16.3.199.16.3.239.16.3.39.16.49.16.4.149.16.4.199.16.4.279.16.4.389.16.4.399.16.4.429.16.4.489.16.4.559.16.4.579.16.4.619.16.4.629.16.4.679.16.4.719.16.4.769.16.4.829.16.4.849.16.4.99.17.19.17.1.109.17.1.119.17.1.139.17.1.159.17.1.209.17.1.309.17.1.339.17.1.399.17.1.459.17.1.79.17.1.99.18.19.18.1.39.18.29.18.2.59.18.2.79.18.2.89.18.39.18.3.399.18.3.469.18.3.539.18.3.559.18.3.569.18.49.18.4.229.18.4.249.18.4.299.18.4.349.18.4.409.18.4.479.18.4.59.18.4.509.18.4.529.18.4.539.18.4.579.18.4.89.19.19.19.1.129.19.1.189.19.1.229.19.1.249.19.1.279.19.1.289.19.1.319.19.1.379.19.1.429.19.1.59.19.1.99.20.29.20.2.109.20.2.219.20.2.229.20.39.20.3.109.20.3.139.20.3.169.20.3.209.20.3.49.20.3.79.20.49.20.4.7
Firepower Extensible Operating System· Cisco
60%
2.10.1.1592.10.1.1662.10.1.1792.10.1.2072.10.1.2342.10.1.2452.10.1.2712.10.1.3122.10.1.3282.10.1.3412.11.1.1542.11.1.1822.11.1.2002.11.1.2052.11.1.2282.11.1.2362.12.0.312.12.0.4322.12.0.4502.12.0.4672.12.0.4982.12.1.292.12.1.482.12.1.722.12.1.842.12.1.952.13.0.1982.13.0.2122.13.0.2432.13.0.2762.13.0.3572.14.1.1312.14.1.1432.14.1.1632.14.1.1672.14.1.1862.14.1.1872.16.0.1282.16.0.1362.17.0.5182.3.1.1102.3.1.1112.3.1.1302.3.1.1442.3.1.1452.3.1.1552.3.1.1662.3.1.1732.3.1.1792.3.1.1802.3.1.1902.3.1.2152.3.1.2162.3.1.2192.3.1.2302.3.1.562.3.1.582.3.1.662.3.1.732.3.1.752.3.1.882.3.1.912.3.1.932.3.1.992.6.1.1312.6.1.1572.6.1.1662.6.1.1692.6.1.1742.6.1.1872.6.1.1922.6.1.2042.6.1.2142.6.1.2242.6.1.2292.6.1.2302.6.1.2382.6.1.2392.6.1.2542.6.1.2592.6.1.2642.6.1.2652.6.1.272
Unified Computing System· Cisco
60%
4.0(1a)4.0(1b)4.0(1c)4.0(1d)4.0(2a)4.0(2b)4.0(2d)4.0(2e)4.0(4a)4.0(4b)4.0(4c)4.0(4d)4.0(4e)4.0(4f)4.0(4g)4.0(4h)4.0(4i)4.0(4k)4.0(4l)4.0(4m)4.0(4n)4.0(4o)4.1(1a)4.1(1b)4.1(1c)4.1(1d)4.1(1e)4.1(2a)4.1(2b)4.1(2c)4.1(3a)4.1(3b)4.1(3c)4.1(3d)4.1(3e)4.1(3f)4.1(3h)4.1(3i)4.1(3j)4.1(3k)4.1(3l)4.1(3m)4.1(3n)4.1(4a)4.2(1c)4.2(1d)4.2(1f)4.2(1i)4.2(1k)4.2(1l)4.2(1m)4.2(1n)4.2(2a)4.2(2c)4.2(2d)4.2(2e)4.2(3b)4.2(3d)4.2(3e)4.2(3g)4.2(3h)4.2(3i)4.2(3j)4.2(3k)4.2(3l)4.2(3m)4.2(3n)4.2(3o)4.2(3p)4.3(2b)4.3(2c)4.3(2e)4.3(2f)4.3(3a)4.3(3c)4.3(4a)4.3(4b)4.3(4c)4.3(4d)4.3(4e)4.3(4f)4.3(5a)4.3(5c)4.3(5d)4.3(5e)4.3(6a)4.3(6b)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: cverecord
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ucsciv-wGYtC78q

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.7MEDIUMcisco
Attack Vector
LOCAL
Complexity
LOW
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-78

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