CVE-2026-4936

MEDIUMNVD 6.26.2—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.2 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 100% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
6.2EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.2Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
6.2
EG Score
6.2(medium)
EG Risk
28(Track)
EG Risk 28/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity62% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
0%
KEV
Not listed

Published

August 19, 2026

Last Modified

August 25, 2026

Advisory Details (1)

Auto-updated Aug 19, 2026
No patch confirmed yet.
generic

Security Bulletin: This Power System update is being released to address CVE-2026-4936

https://www.ibm.com/support/pages/node/7283890

Vendor Advisories for CVE-2026-4936(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 67× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-19 02:51 UTCGHSA enrichment
  2. 2026-09-18 05:10 UTCEG score recompute
  3. 2026-09-18 05:10 UTCGHSA enrichment
  4. 2026-09-17 07:29 UTCEG score recompute
  5. 2026-09-17 07:29 UTCGHSA enrichment
  6. 2026-09-16 14:08 UTCEPSS rescore
  7. 2026-09-16 09:47 UTCGHSA enrichment
  8. 2026-09-15 11:18 UTCGHSA enrichment
  9. 2026-09-14 13:21 UTCGHSA enrichment
  10. 2026-09-13 15:39 UTCGHSA enrichment
  11. 2026-09-12 17:57 UTCGHSA enrichment
  12. 2026-09-11 20:16 UTCEG score recompute
  13. 2026-09-11 20:16 UTCGHSA enrichment
  14. 2026-09-11 14:53 UTCEPSS rescore
  15. 2026-09-10 22:34 UTCEG score recompute
  16. 2026-09-10 22:34 UTCGHSA enrichment
  17. 2026-09-10 09:35 UTCEPSS rescore
  18. 2026-09-10 00:53 UTCGHSA enrichment
  19. 2026-09-09 02:29 UTCGHSA enrichment
  20. 2026-09-07 15:38 UTCGHSA enrichment
  21. 2026-09-06 16:36 UTCGHSA enrichment
  22. 2026-09-05 18:55 UTCGHSA enrichment
  23. 2026-09-04 21:14 UTCEG score recompute
  24. 2026-09-04 21:14 UTCGHSA enrichment
  25. 2026-09-04 05:06 UTCEPSS rescore
Show 45 more
  1. 2026-09-03 22:20 UTCGHSA enrichment
  2. 2026-09-03 00:28 UTCGHSA enrichment
  3. 2026-09-02 02:45 UTCEG score recompute
  4. 2026-09-02 02:45 UTCGHSA enrichment
  5. 2026-09-01 13:54 UTCEPSS rescore
  6. 2026-09-01 05:04 UTCEG score recompute
  7. 2026-09-01 05:03 UTCGHSA enrichment
  8. 2026-09-01 04:40 UTCEPSS rescore
  9. 2026-08-31 07:20 UTCEG score recompute
  10. 2026-08-31 07:19 UTCGHSA enrichment
  11. 2026-08-30 19:17 UTCEPSS rescore
  12. 2026-08-30 09:26 UTCGHSA enrichment
  13. 2026-08-29 11:37 UTCEG score recompute
  14. 2026-08-29 11:37 UTCGHSA enrichment
  15. 2026-08-28 21:41 UTCEPSS rescore
  16. 2026-08-28 13:52 UTCGHSA enrichment
  17. 2026-08-27 16:09 UTCGHSA enrichment
  18. 2026-08-26 18:26 UTCEG score recompute
  19. 2026-08-26 18:26 UTCGHSA enrichment
  20. 2026-08-26 14:46 UTCEPSS rescore
  21. 2026-08-25 20:44 UTCEG score recompute▲ 1.10
  22. 2026-08-25 20:44 UTCGHSA enrichment
  23. 2026-08-25 20:44 UTCNVD updateCVSS v3 → 6.2
  24. 2026-08-25 13:49 UTCEPSS rescore
  25. 2026-08-25 02:51 UTCEG score recompute
  26. 2026-08-25 02:51 UTCGHSA enrichment
  27. 2026-08-24 05:10 UTCGHSA enrichment
  28. 2026-08-23 07:29 UTCEG score recompute
  29. 2026-08-23 07:29 UTCGHSA enrichment
  30. 2026-08-23 00:19 UTCEPSS rescore
  31. 2026-08-22 09:47 UTCEG score recompute
  32. 2026-08-22 09:47 UTCGHSA enrichment
  33. 2026-08-21 23:49 UTCEPSS rescore
  34. 2026-08-21 12:06 UTCEG score recompute
  35. 2026-08-21 12:06 UTCGHSA enrichment
  36. 2026-08-20 22:55 UTCEPSS rescore
  37. 2026-08-20 14:25 UTCEG score recompute
  38. 2026-08-20 14:25 UTCGHSA enrichment
  39. 2026-08-20 13:52 UTCEG score recompute
  40. 2026-08-20 13:52 UTCGHSA enrichment
  41. 2026-08-20 13:25 UTCEG score recompute
  42. 2026-08-20 13:25 UTCGHSA enrichment
  43. 2026-08-19 21:20 UTCEG score recompute
  44. 2026-08-19 20:28 UTCEG score recompute
  45. 2026-08-19 20:27 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-4936?
CVE-2026-4936 is a medium vulnerability published on August 19, 2026. 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…
When was CVE-2026-4936 disclosed?
CVE-2026-4936 was first published in the National Vulnerability Database on August 19, 2026, with the most recent update on August 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-4936 actively exploited?
CVE-2026-4936 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 99.9% of all scored CVEs.
What is the CVSS score of CVE-2026-4936?
CVE-2026-4936 has a CVSS v3 base score of 6.2 (NVD).
How do I remediate CVE-2026-4936?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-4936, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-4936

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