CVE-2026-17091

HIGHPre-NVD 8.48.4—
EchelonGraph scoreMEDIUM confidence

Score 8.4 from GitHub Security Advisory (severity: HIGH) published 2026-08-19. a secondary CVSS source baseline 8.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.4Exploit: None knownExposed: 0

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

IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 is affected by a vulnerability in the PowerVM hypervisor call interface. An attacker with root access to a guest partition can issue a specially crafted hypervisor call to inject an arbitrary amount of data into hypervisor or partition memory, resulting in either a crash causing a full platform re-IPL and terminating all hosted partitions, or corruption of hypervisor or partition memory. The PowerVM hypervisor will restart automatically; however, repeated exploitation could result in a sustained availability impact. Successful exploitation results in an integrity and availability impact to the managed system.

CVSS v3
8.4
EG Score
8.4(medium)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity84% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
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-2026-17091

https://www.ibm.com/support/pages/node/7283229

Vendor Advisories for CVE-2026-17091(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 22× in last 7d / 100× 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 117 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-17091?
CVE-2026-17091 is a high vulnerability published on August 19, 2026. IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 is affected by a vulnerability in the PowerVM hypervisor call interface. An attacker with root access to a guest partition can issue a specially crafted hypervisor call to…
When was CVE-2026-17091 disclosed?
CVE-2026-17091 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-2026-17091 actively exploited?
CVE-2026-17091 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 98.2% of all scored CVEs.
What is the CVSS score of CVE-2026-17091?
CVE-2026-17091 has a CVSS v3 base score of 8.4 (NVD).
How do I remediate CVE-2026-17091?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-17091, 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

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