CVE-2026-16834

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-19. A secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to cause a denial of service due to an integer underflow.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
59
EG Risk 59/100CISA SSVC

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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.6%
EPSS %ILE
48th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 19, 2026

Last Modified

August 24, 2026

Advisory Details (1)

Auto-updated Sep 28, 2026
Patch available.
generic

Security Bulletin: Vulnerabilities in IBM AIX and PowerVM VIOS

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

Vendor Advisories for CVE-2026-16834(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 40× in last 7d / 192× 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 323 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-16834?
CVE-2026-16834 is a critical 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 cause a denial of service due to an integer underflow.
When was CVE-2026-16834 disclosed?
CVE-2026-16834 was first published on August 19, 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-2026-16834 actively exploited?
CVE-2026-16834 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (48th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-16834?
CVE-2026-16834 has a CVSS base score of 9.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-16834?
A fix for CVE-2026-16834 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-16834 are linked in the Vendor Advisories panel on this page.

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