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CVE-2026-81936VulnerabilityPublished

An internal security review identified a development regression from ThinkSystem v4 XClarity Controller 3 (XCC3)

Source GCVE Database

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Authoritative record:CVE-2026-81936· Medium 6.8

Not known to be exploited · CVSS 6.8 Medium.

Data as of 12 Nov 2026, 02:18 UTC

CVSS 3.1 base score
6.8Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (lenovo)CVSS 3.16.8
CNA (lenovo)CVSS 4.07.1
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 11 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
LenovoXClarity ControllerAffected
  • ≥ IHX432Y, ≤ IHX436K
Fixed in–

AI-suggested

Affected versions (2.51 IHX432Y through 2.56 IHX436K) are no longer available for download, indicating that the vendor has withdrawn these versions. Users should avoid deploying these versions and ensure they use versions outside this range. Process enhancements have been implemented by the vendor to prevent recurrence. No explicit patch or fixed version is provided; therefore, users should confirm with the vendor for updated versions or official fixes. Since this is not a cloud service, remediation depends on upgrading or replacing affected firmware versions.

Description

A development regression in ThinkSystem v4 XClarity Controller 3 (XCC3) versions 2.51 IHX432Y through 2.56 IHX436K re-introduces the default OpenBMC root password after performing an XCC Reset to Default operation. This allows an attacker with administrative privileges to gain access to enabled administrative interfaces and the underlying XCC Operating System, which is normally inaccessible. These affected versions are no longer available for download, and process improvements have been implemented to prevent similar regressions.

References

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