CVE-2026-16883

MEDIUMPre-NVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-08-19. A secondary CVSS source baseline 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 5.5Exploit: 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 local attacker to obtain sensitive information due to an out-of-bounds read.

CVSS v3
5.5
EG Score
5.5MEDIUMmedium confidence
EG Risk
25
EG Risk 25/100CISA 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
Severity55% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.1%
EPSS %ILE
3rd
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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 20, 2026

Advisory Details (1)

Auto-updated Aug 19, 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-2026-16883(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 17× in last 7d / 63× 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 114 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-16883?
CVE-2026-16883 is a medium 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 obtain sensitive information due to an out-of-bounds read.
When was CVE-2026-16883 disclosed?
CVE-2026-16883 was first published on August 19, 2026, with the most recent update on August 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16883 actively exploited?
CVE-2026-16883 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (3rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-16883?
CVE-2026-16883 has a CVSS base score of 5.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-16883?
A fix for CVE-2026-16883 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-16883 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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