CVE-2026-12943
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedIBM HMC V10.3.1050.0 through 10.3.1064.0 and IBM HMC V11.1.1110.0 through 11.1.1112.0 Management systems in IBM Power environments (HMC and Novalink) could allow an unauthenticated user to execute arbitrary commands with elevated privileges on the system due to improper validation of user supplied input.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceUnauthenticated command injection vulnerability in IBM Hardware Management Console (HMC) versions 10.3.1050.0-10.3.1064.0 and 11.1.1110.0-11.1.1112.0 allows remote attackers to execute arbitrary commands with elevated privileges due to improper validation of user-supplied input. Affects both HMC and Novalink management interfaces in IBM Power environments.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data>= 10.3.1050.0, < 10.3.1064.1>= 11.1.1110.0, < 11.1.1112.1CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify HMC versionLog into the HMC command line interface and run: lshmc -v or lshmc --version. Alternatively, access the HMC web GUI and navigate to the 'About' or 'System Information' section to view the firmware version.Affected if The displayed version number falls within 10.3.1050.0 through 10.3.1064.0 OR 11.1.1110.0 through 11.1.1112.0, indicating the installed version is before the fixed releases 10.3.1064.1 and 11.1.1112.1.
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Confirm HMC model typeRun: lshmc -r or check the HMC GUI dashboard. Verify the system is an IBM Hardware Management Console (HMC) managing Power environments.Affected if The system is confirmed as an IBM Hardware Management Console or runs the Novalink component in IBM Power environments.
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Determine network exposure of HMC interfacesReview firewall rules, network configurations, or VPC/security group settings to determine if the HMC management interface (typically ports 22/SSH, 443/HTTPS, or 80/HTTP) is accessible from untrusted networks or the public internet.Affected if The HMC management interface is externally accessible or accessible from non-admin networks, because the vulnerability allows unauthenticated command injection.
You are affected if your IBM HMC version is 10.3.1050.0-10.3.1064.0 or 11.1.1110.0-11.1.1112.0 AND the HMC management interface is network-accessible to potential attackers.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor data10.3.1064.111.1.1112.1
Apply IBM security patches to upgrade HMC to a version beyond 10.3.1064.0 or 11.1.1112.0 per IBM's remediation guidance. If patching is immediately infeasible, restrict network access to HMC management interfaces and disable unnecessary services.
- Consultation3.0 h
- Implementation6.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-12943 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-12943 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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