CVE-2026-20200: A vulnerability in the web-based management interface of Cisco IMC could allow an authenticated, remote attack

This month

HIGH 8.8MITIGATE

CVE-2026-20200 is a high-severity flaw (CVSS 8.8) affecting unified computing system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability in the web-based management interface of Cisco IMC could allow an authenticated, remote attacker with low privileges to execute arbitrary commands on the underlying operating system of an affected system and elevate privileges to root.  This vulnerability is due to improper validation of user-supplied input. An attacker could exploit this vulnerability by entering crafted inputs to the web-based management interface of the

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.7% (top 46%)
CISA exploited list	No
Weakness	CWE-141
Published	2026-08-05
Last modified	2026-10-23

Publisher (CNA): Cisco Systems, Inc. · Vendor: cisco

Last updated 2026-10-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-05 17:16 UTCPublished CVE record published
2026-10-23 21:10 UTCUpdated Record last modified

cisco unified computing system MITIGATE

Affected: 4.3\(1.230097\) · 4.3\(1.230124\) · 4.3\(1.230138\) · 4.3\(2.230207\) · 4.3\(2.230270\) · 4.3\(2.240002\) · 4.3\(3.240022\) · 4.3\(3.240043\)

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy unified-computing-system || rpm -q unified-computing-system || unified-computing-system --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · kwin-zones · FIXED · 1.0.13-1.fc46 · FEDORA-2026-95888f332b · source

sudo dnf upgrade --advisory=FEDORA-2026-95888f332b

Fedora ELN · nginx-mod-brotli · FIXED · 1.0.0~rc-16.eln159 · FEDORA-2026-501a6a8273 · source

sudo dnf upgrade --advisory=FEDORA-2026-501a6a8273

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

GitHub PoC: NSIDE-ATTACK-LOGIC/CIMCown (1 stars)
Write-up: sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cimc-arg-in

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-20200?

unified computing system: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-20200 being exploited?

CVE-2026-20200 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-20200 affect?

CVE-2026-20200 affects unified computing system. Severity is high (CVSS 8.8). A vulnerability in the web-based management interface of Cisco IMC could allow an authenticated, remote attacker with low privileges to execute arbitrary commands on the underlying operating system of an affected system and elevate privileg

How urgent is CVE-2026-20200?

Priority 44/100. High severity

Software pages

Cisco vulnerabilities

References

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