CVE-2026-16909

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-19. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: 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 execute arbitrary code due to an off-by-one error in bounds checking.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity88% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
21%
KEV
Not listed

Published

August 19, 2026

Last Modified

August 21, 2026

Advisory Details (1)

Auto-updated Aug 19, 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-2026-16909(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 26× in last 7d / 119× 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 122 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-16909?
CVE-2026-16909 is a high vulnerability published on August 19, 2026. IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to execute arbitrary code due to an off-by-one error in bounds checking.
When was CVE-2026-16909 disclosed?
CVE-2026-16909 was first published in the National Vulnerability Database on August 19, 2026, with the most recent update on August 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16909 actively exploited?
CVE-2026-16909 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 78.6% of all scored CVEs.
What is the CVSS score of CVE-2026-16909?
CVE-2026-16909 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-16909?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16909, 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-2026-16909

Explore →

Is Your Infrastructure Affected by CVE-2026-16909?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs