Local file overwrite via overprivileged read-only CLI
Published Feb 25, 2026 · Updated Feb 25, 2026
Privilege escalation in Cisco UCS Manager 4.3(6e) and earlier allows local users with read-only access to create or overwrite files. The NX-OS CLI assigns unnecessary privileges to the read-only role, permitting filesystem writes and limited privileged actions. Exploitation requires authentication as a read-only user and access to the device's NX-OS CLI; the reported consequence excludes service interruption.
Summary
What happened
Privilege escalation in Cisco UCS Manager 4.3(6e) and earlier allows local users with read-only access to create or overwrite files. The NX-OS CLI assigns unnecessary privileges to the read-only role, permitting filesystem writes and limited privileged actions. Exploitation requires authentication as a read-only user and access to the device's NX-OS CLI; the reported consequence excludes service interruption.
The record
- CVE
- CVE-2026-20037
- Published
- Feb 25, 2026
- Updated
- Feb 25, 2026
- Vendor
- ClamAV
- Product
- Cisco UCS Manager
- Classifications
- CWE-250, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 25, 2026CVE publishedPublication date reported by the CVE source.
- Feb 25, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=4.0(1a)
- Affected versionversion=4.0(1b)
- Affected versionversion=4.0(1c)
- Affected versionversion=4.0(1d)
- Affected versionversion=4.0(2a)
- Affected versionversion=4.0(2b)
- Affected versionversion=4.0(2d)
- Affected versionversion=4.0(2e)
- Affected versionversion=4.0(4a)
- Affected versionversion=4.0(4b)
- Affected versionversion=4.0(4c)
- Affected versionversion=4.0(4d)
- Affected versionversion=4.0(4e)
- Affected versionversion=4.0(4f)
- Affected versionversion=4.0(4g)
- Affected versionversion=4.0(4h)
- Affected versionversion=4.0(4i)
- Affected versionversion=4.0(4k)
- Affected versionversion=4.0(4l)
- Affected versionversion=4.0(4m)
- Affected versionversion=4.0(4n)
- Affected versionversion=4.0(4o)
- Affected versionversion=4.1(1a)
- Affected versionversion=4.1(1b)
- Affected versionversion=4.1(1c)
- Affected versionversion=4.1(1d)
- Affected versionversion=4.1(1e)
- Affected versionversion=4.1(2a)
- Affected versionversion=4.1(2b)
- Affected versionversion=4.1(2c)
- Affected versionversion=4.1(3a)
- Affected versionversion=4.1(3b)
- Affected versionversion=4.1(3c)
- Affected versionversion=4.1(3d)
- Affected versionversion=4.1(3e)
- Affected versionversion=4.1(3f)
- Affected versionversion=4.1(3h)
- Affected versionversion=4.1(3i)
- Affected versionversion=4.1(3j)
- Affected versionversion=4.1(3k)
- Affected versionversion=4.1(3l)
- Affected versionversion=4.1(3m)
- Affected versionversion=4.1(3n)
- Affected versionversion=4.1(4a)
- Affected versionversion=4.2(1c)
- Affected versionversion=4.2(1d)
- Affected versionversion=4.2(1f)
- Affected versionversion=4.2(1i)
- Affected versionversion=4.2(1k)
- Affected versionversion=4.2(1l)
- Affected versionversion=4.2(1m)
- Affected versionversion=4.2(1n)
- Affected versionversion=4.2(2a)
- Affected versionversion=4.2(2c)
- Affected versionversion=4.2(2d)
- Affected versionversion=4.2(2e)
- Affected versionversion=4.2(3b)
- Affected versionversion=4.2(3d)
- Affected versionversion=4.2(3e)
- Affected versionversion=4.2(3g)
- Affected versionversion=4.2(3h)
- Affected versionversion=4.2(3i)
- Affected versionversion=4.2(3j)
- Affected versionversion=4.2(3k)
- Affected versionversion=4.2(3l)
- Affected versionversion=4.2(3m)
- Affected versionversion=4.2(3n)
- Affected versionversion=4.2(3o)
- Affected versionversion=4.2(3p)
- Affected versionversion=4.3(2b)
- Affected versionversion=4.3(2c)
- Affected versionversion=4.3(2e)
- Affected versionversion=4.3(2f)
- Affected versionversion=4.3(3a)
- Affected versionversion=4.3(3c)
- Affected versionversion=4.3(4a)
- Affected versionversion=4.3(4b)
- Affected versionversion=4.3(4c)
- Affected versionversion=4.3(4d)
- Affected versionversion=4.3(4e)
- Affected versionversion=4.3(4f)
- Affected versionversion=4.3(5a)
- Affected versionversion=4.3(5c)
- Affected versionversion=4.3(5d)
- Affected versionversion=4.3(5e)
- Affected versionversion=4.3(6a)
- Affected versionversion=4.3(6b)
- Affected versionversion=4.3(6c)
- Affected versionversion=4.3(6d)
- Affected versionversion=4.3(6e)
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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