CVE-2026-4936
MEDIUMDescription
IBM PowerVM Hypervisor Platform KeyStore (PKS) and virtual TPM FW1110.00 through FW1110.20, FW1060.00 through FW1060.71, and FW950.00 through FW950.H2 use persistent storage key seeds that result in an AES key with reduced strength. An attacker with access to the service processor or HMC could exploit this weakness to derive the encryption key and access the data.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:C/C:H/I:N/A:N
Exploit Intelligence
Low risk: more likely to be exploited than 0% of all known CVEs.
References
Related Vulnerabilities
Other CWE-331 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2008-1447 | Medium | 6.8 | 95% | - | Fix |
| CVE-2018-18326 | High | 7.5 | 54% | - | - |
| CVE-2018-15812 | High | 7.5 | 47% | - | - |
| CVE-2023-38357 | Medium | 5.3 | 5.3% | - | Fix |
| CVE-2015-3405 | High | 7.5 | 5.0% | - | Fix |
| CVE-2008-2108 | Critical | 9.8 | 4.3% | - | Fix |
Common questions
How do I fix CVE-2026-4936?
Published advisories record a fix for 24 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.
Is CVE-2026-4936 being actively exploited?
Not that we know of. CVE-2026-4936 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.07% is the estimated probability that it will be exploited in the next 30 days. That is higher than 0% of all scored CVEs.
How severe is CVE-2026-4936?
CVE-2026-4936 has a CVSS v3 base score of 5.1, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2026-4936 affect?
Published advisories record a fix for power system e1050 \(9043-mrx\) firmware (NVD), power system e1080 \(9080-hex\) firmware (NVD), power system e1150 \(9043-mru\) firmware (NVD), power system e1180 \(9080-heu\) firmware (NVD), and 20 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
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Markdown
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TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.
This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-08-25.