CVE-2026-16989

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.8 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 97% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: 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 local attacker to gain elevated privileges due to improper resolution of symbolic links.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

August 20, 2026

Last Modified

August 24, 2026

Advisory Details (1)

Auto-updated Aug 20, 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-2026-16989(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 23× in last 7d / 118× 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 127 total refreshes for this CVE.

  1. 2026-09-20 09:46 UTCGHSA enrichment
  2. 2026-09-19 22:37 UTCEG score recompute
  3. 2026-09-19 22:37 UTCGHSA enrichment
  4. 2026-09-19 11:16 UTCGHSA enrichment
  5. 2026-09-19 00:08 UTCEG score recompute
  6. 2026-09-19 00:08 UTCGHSA enrichment
  7. 2026-09-18 19:27 UTCEPSS rescore
  8. 2026-09-18 13:00 UTCGHSA enrichment
  9. 2026-09-18 01:52 UTCGHSA enrichment
  10. 2026-09-17 14:44 UTCGHSA enrichment
  11. 2026-09-17 03:28 UTCGHSA enrichment
  12. 2026-09-16 15:48 UTCEG score recompute
  13. 2026-09-16 15:48 UTCGHSA enrichment
  14. 2026-09-16 14:07 UTCEPSS rescore
  15. 2026-09-16 05:14 UTCEPSS rescore
  16. 2026-09-16 04:40 UTCGHSA enrichment
  17. 2026-09-15 17:25 UTCGHSA enrichment
  18. 2026-09-15 06:16 UTCEG score recompute
  19. 2026-09-15 06:16 UTCGHSA enrichment
  20. 2026-09-14 19:08 UTCGHSA enrichment
  21. 2026-09-14 07:10 UTCGHSA enrichment
  22. 2026-09-13 20:02 UTCEG score recompute
  23. 2026-09-13 20:02 UTCGHSA enrichment
  24. 2026-09-13 16:46 UTCEPSS rescore
  25. 2026-09-13 08:54 UTCGHSA enrichment
Show 75 more
  1. 2026-09-12 21:46 UTCEG score recompute
  2. 2026-09-12 21:46 UTCGHSA enrichment
  3. 2026-09-12 15:00 UTCEPSS rescore
  4. 2026-09-12 10:37 UTCGHSA enrichment
  5. 2026-09-11 23:27 UTCEG score recompute
  6. 2026-09-11 23:27 UTCGHSA enrichment
  7. 2026-09-11 14:52 UTCEPSS rescore
  8. 2026-09-11 12:10 UTCEG score recompute
  9. 2026-09-11 12:10 UTCGHSA enrichment
  10. 2026-09-11 09:36 UTCEPSS rescore
  11. 2026-09-11 00:17 UTCGHSA enrichment
  12. 2026-09-10 12:14 UTCEG score recompute
  13. 2026-09-10 12:14 UTCGHSA enrichment
  14. 2026-09-10 09:34 UTCEPSS rescore
  15. 2026-09-10 00:47 UTCGHSA enrichment
  16. 2026-09-09 13:04 UTCGHSA enrichment
  17. 2026-09-09 01:52 UTCEG score recompute
  18. 2026-09-09 01:52 UTCGHSA enrichment
  19. 2026-09-08 22:00 UTCEPSS rescore
  20. 2026-09-08 02:39 UTCEG score recompute
  21. 2026-09-08 02:39 UTCGHSA enrichment
  22. 2026-09-07 16:01 UTCEPSS rescore
  23. 2026-09-07 15:31 UTCGHSA enrichment
  24. 2026-09-07 02:42 UTCGHSA enrichment
  25. 2026-09-06 15:26 UTCEG score recompute
  26. 2026-09-06 15:26 UTCGHSA enrichment
  27. 2026-09-06 13:47 UTCEPSS rescore
  28. 2026-09-06 04:18 UTCGHSA enrichment
  29. 2026-09-05 17:10 UTCEG score recompute
  30. 2026-09-05 17:10 UTCGHSA enrichment
  31. 2026-09-05 05:57 UTCGHSA enrichment
  32. 2026-09-04 18:49 UTCEG score recompute
  33. 2026-09-04 18:49 UTCGHSA enrichment
  34. 2026-09-04 07:12 UTCEG score recompute
  35. 2026-09-04 07:12 UTCGHSA enrichment
  36. 2026-09-04 05:06 UTCEPSS rescore
  37. 2026-09-03 19:31 UTCGHSA enrichment
  38. 2026-09-03 08:19 UTCGHSA enrichment
  39. 2026-09-02 21:08 UTCEG score recompute
  40. 2026-09-02 21:08 UTCGHSA enrichment
  41. 2026-09-02 14:11 UTCEPSS rescore
  42. 2026-09-02 06:22 UTCGHSA enrichment
  43. 2026-09-01 19:14 UTCEG score recompute
  44. 2026-09-01 19:13 UTCGHSA enrichment
  45. 2026-09-01 13:53 UTCEPSS rescore
  46. 2026-09-01 08:02 UTCEG score recompute
  47. 2026-09-01 08:02 UTCGHSA enrichment
  48. 2026-09-01 04:39 UTCEPSS rescore
  49. 2026-08-31 20:51 UTCGHSA enrichment
  50. 2026-08-31 09:26 UTCGHSA enrichment
  51. 2026-08-30 22:17 UTCEG score recompute
  52. 2026-08-30 22:17 UTCGHSA enrichment
  53. 2026-08-30 19:17 UTCEPSS rescore
  54. 2026-08-30 11:09 UTCEG score recompute
  55. 2026-08-30 11:09 UTCGHSA enrichment
  56. 2026-08-30 01:22 UTCEPSS rescore
  57. 2026-08-30 00:01 UTCGHSA enrichment
  58. 2026-08-29 12:53 UTCGHSA enrichment
  59. 2026-08-29 01:40 UTCEG score recompute
  60. 2026-08-29 01:40 UTCGHSA enrichment
  61. 2026-08-28 21:41 UTCEPSS rescore
  62. 2026-08-28 14:28 UTCGHSA enrichment
  63. 2026-08-28 03:20 UTCGHSA enrichment
  64. 2026-08-27 16:09 UTCEG score recompute
  65. 2026-08-27 16:09 UTCGHSA enrichment
  66. 2026-08-27 14:25 UTCEPSS rescore
  67. 2026-08-27 05:01 UTCGHSA enrichment
  68. 2026-08-26 17:53 UTCGHSA enrichment
  69. 2026-08-26 06:16 UTCGHSA enrichment
  70. 2026-08-25 19:05 UTCEG score recompute
  71. 2026-08-25 19:05 UTCGHSA enrichment
  72. 2026-08-25 13:48 UTCEPSS rescore
  73. 2026-08-25 07:55 UTCGHSA enrichment
  74. 2026-08-24 20:48 UTCEG score recompute▲ 0.70
  75. 2026-08-24 20:48 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2026-16989?
CVE-2026-16989 is a high vulnerability published on August 20, 2026. IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a local attacker to gain elevated privileges due to improper resolution of symbolic links.
When was CVE-2026-16989 disclosed?
CVE-2026-16989 was first published in the National Vulnerability Database on August 20, 2026, with the most recent update on August 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16989 actively exploited?
CVE-2026-16989 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 97.0% of all scored CVEs.
What is the CVSS score of CVE-2026-16989?
CVE-2026-16989 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-16989?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16989, 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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