CVE-2026-16926

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-20. a secondary CVSS source baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: None knownExposed: 0

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

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to overwrite arbitrary files due to improper neutralization of special elements in input.

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
56(Track)
EG Risk 56/100SSVC: 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
Severity91% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
24%
KEV
Not listed

Published

August 20, 2026

Last Modified

August 25, 2026

Advisory Details (1)

Auto-updated Sep 15, 2026
No patch confirmed yet.
generic

Security Bulletin: Vulnerabilities in IBM AIX and PowerVM VIOS

https://www.ibm.com/support/pages/node/7283858

Vendor Advisories for CVE-2026-16926(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 53× in last 7d / 232× 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 235 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-16926?
CVE-2026-16926 is a critical vulnerability published on August 20, 2026. IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to overwrite arbitrary files due to improper neutralization of special elements in input.
When was CVE-2026-16926 disclosed?
CVE-2026-16926 was first published in the National Vulnerability Database on August 20, 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-2026-16926 actively exploited?
CVE-2026-16926 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 75.5% of all scored CVEs.
What is the CVSS score of CVE-2026-16926?
CVE-2026-16926 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-16926?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16926, 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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