CVE-2026-16838

HIGHPre-NVD 7.07.0—
EchelonGraph scoreMEDIUM confidence

Score 7.0 from GitHub Security Advisory (severity: HIGH) published 2026-08-19. a secondary CVSS source baseline 7.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.0Exploit: 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 local attacker to overwrite critical files and obtain sensitive information due to a time-of-check to time-of-use (TOCTOU) race condition.

CVSS v3
7.0
EG Score
7.0(medium)
EG Risk
32(Track)
EG Risk 32/100SSVC: 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
Severity70% × 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 26, 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-2026-16838(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 / 105× 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 111 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-16838?
CVE-2026-16838 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 local attacker to overwrite critical files and obtain sensitive information due to a time-of-check to time-of-use (TOCTOU) race condition.
When was CVE-2026-16838 disclosed?
CVE-2026-16838 was first published in the National Vulnerability Database on August 19, 2026, with the most recent update on August 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16838 actively exploited?
CVE-2026-16838 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 99.8% of all scored CVEs.
What is the CVSS score of CVE-2026-16838?
CVE-2026-16838 has a CVSS v3 base score of 7.0 (NVD).
How do I remediate CVE-2026-16838?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16838, 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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