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% (below the 1st percentile of EPSS-scored CVEs). 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: 0.1%CVSS: 6.2Exploit: None knownExposed services: Not assessed

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

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
6.2MEDIUMmedium confidence
EG Risk
28
EG Risk 28/100CISA SSVC

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%
CISA SSVC: Track at every mission impact level.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.1%
EPSS %ILE
below the 1st
KEV
Not listed

CISA SSVCTrack at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

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 15× in last 7d / 55× 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.

Showing the most recent 100 of 103 total refreshes for this CVE.

  1. 2026-10-05 01:44 UTCGHSA enrichment
  2. 2026-10-04 03:06 UTCEG score recompute
  3. 2026-10-04 03:06 UTCGHSA enrichment
  4. 2026-10-03 14:26 UTCEPSS rescore
  5. 2026-10-03 05:13 UTCEG score recompute
  6. 2026-10-03 05:13 UTCGHSA enrichment
  7. 2026-10-02 06:50 UTCEG score recompute
  8. 2026-10-02 06:50 UTCGHSA enrichment
  9. 2026-10-01 19:50 UTCEPSS rescore
  10. 2026-10-01 06:18 UTCEG score recompute
  11. 2026-10-01 06:18 UTCGHSA enrichment
  12. 2026-09-30 15:03 UTCEPSS rescore
  13. 2026-09-30 08:37 UTCGHSA enrichment
  14. 2026-09-29 02:04 UTCEG score recompute
  15. 2026-09-29 02:04 UTCGHSA enrichment
  16. 2026-09-28 03:51 UTCEG score recompute
  17. 2026-09-28 03:51 UTCGHSA enrichment
  18. 2026-09-27 13:48 UTCEPSS rescore
  19. 2026-09-27 05:57 UTCEG score recompute
  20. 2026-09-27 05:57 UTCGHSA enrichment
  21. 2026-09-26 15:59 UTCEPSS rescore
  22. 2026-09-26 00:27 UTCEPSS rescore
  23. 2026-09-24 19:34 UTCEG score recompute
  24. 2026-09-24 19:34 UTCGHSA enrichment
  25. 2026-09-23 20:08 UTCEG score recompute
Show 75 more
  1. 2026-09-23 20:08 UTCGHSA enrichment
  2. 2026-09-23 17:53 UTCEPSS rescore
  3. 2026-09-22 19:48 UTCEG score recompute
  4. 2026-09-22 19:48 UTCGHSA enrichment
  5. 2026-09-21 19:54 UTCGHSA enrichment
  6. 2026-09-20 22:13 UTCGHSA enrichment
  7. 2026-09-20 00:31 UTCEG score recompute
  8. 2026-09-20 00:31 UTCGHSA enrichment
  9. 2026-09-19 02:51 UTCGHSA enrichment
  10. 2026-09-18 05:10 UTCEG score recompute
  11. 2026-09-18 05:10 UTCGHSA enrichment
  12. 2026-09-17 07:29 UTCEG score recompute
  13. 2026-09-17 07:29 UTCGHSA enrichment
  14. 2026-09-16 14:08 UTCEPSS rescore
  15. 2026-09-16 09:47 UTCGHSA enrichment
  16. 2026-09-15 11:18 UTCGHSA enrichment
  17. 2026-09-14 13:21 UTCGHSA enrichment
  18. 2026-09-13 15:39 UTCGHSA enrichment
  19. 2026-09-12 17:57 UTCGHSA enrichment
  20. 2026-09-11 20:16 UTCEG score recompute
  21. 2026-09-11 20:16 UTCGHSA enrichment
  22. 2026-09-11 14:53 UTCEPSS rescore
  23. 2026-09-10 22:34 UTCEG score recompute
  24. 2026-09-10 22:34 UTCGHSA enrichment
  25. 2026-09-10 09:35 UTCEPSS rescore
  26. 2026-09-10 00:53 UTCGHSA enrichment
  27. 2026-09-09 02:29 UTCGHSA enrichment
  28. 2026-09-07 15:38 UTCGHSA enrichment
  29. 2026-09-06 16:36 UTCGHSA enrichment
  30. 2026-09-05 18:55 UTCGHSA enrichment
  31. 2026-09-04 21:14 UTCEG score recompute
  32. 2026-09-04 21:14 UTCGHSA enrichment
  33. 2026-09-04 05:06 UTCEPSS rescore
  34. 2026-09-03 22:20 UTCGHSA enrichment
  35. 2026-09-03 00:28 UTCGHSA enrichment
  36. 2026-09-02 02:45 UTCEG score recompute
  37. 2026-09-02 02:45 UTCGHSA enrichment
  38. 2026-09-01 13:54 UTCEPSS rescore
  39. 2026-09-01 05:04 UTCEG score recompute
  40. 2026-09-01 05:03 UTCGHSA enrichment
  41. 2026-09-01 04:40 UTCEPSS rescore
  42. 2026-08-31 07:20 UTCEG score recompute
  43. 2026-08-31 07:19 UTCGHSA enrichment
  44. 2026-08-30 19:17 UTCEPSS rescore
  45. 2026-08-30 09:26 UTCGHSA enrichment
  46. 2026-08-29 11:37 UTCEG score recompute
  47. 2026-08-29 11:37 UTCGHSA enrichment
  48. 2026-08-28 21:41 UTCEPSS rescore
  49. 2026-08-28 13:52 UTCGHSA enrichment
  50. 2026-08-27 16:09 UTCGHSA enrichment
  51. 2026-08-26 18:26 UTCEG score recompute
  52. 2026-08-26 18:26 UTCGHSA enrichment
  53. 2026-08-26 14:46 UTCEPSS rescore
  54. 2026-08-25 20:44 UTCEG score recompute▲ 1.10
  55. 2026-08-25 20:44 UTCGHSA enrichment
  56. 2026-08-25 20:44 UTCNVD updateCVSS v3 → 6.2
  57. 2026-08-25 13:49 UTCEPSS rescore
  58. 2026-08-25 02:51 UTCEG score recompute
  59. 2026-08-25 02:51 UTCGHSA enrichment
  60. 2026-08-24 05:10 UTCGHSA enrichment
  61. 2026-08-23 07:29 UTCEG score recompute
  62. 2026-08-23 07:29 UTCGHSA enrichment
  63. 2026-08-23 00:19 UTCEPSS rescore
  64. 2026-08-22 09:47 UTCEG score recompute
  65. 2026-08-22 09:47 UTCGHSA enrichment
  66. 2026-08-21 23:49 UTCEPSS rescore
  67. 2026-08-21 12:06 UTCEG score recompute
  68. 2026-08-21 12:06 UTCGHSA enrichment
  69. 2026-08-20 22:55 UTCEPSS rescore
  70. 2026-08-20 14:25 UTCEG score recompute
  71. 2026-08-20 14:25 UTCGHSA enrichment
  72. 2026-08-20 13:52 UTCEG score recompute
  73. 2026-08-20 13:52 UTCGHSA enrichment
  74. 2026-08-20 13:25 UTCEG score recompute
  75. 2026-08-20 13:25 UTCGHSA enrichment

Related CVEs(same CWE)

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 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 0.1% probability of exploitation in the next 30 days (below the 1st percentile of EPSS-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?
No fix for CVE-2026-4936 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-4936 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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