CVE-2026-18822

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.5 under NVD CVSS v3. EPSS exploit probability: 0.1% (below the 1st percentile of EPSS-scored CVEs). GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
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 cause a denial of service due to uncontrolled resource consumption when parsing directory records.

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
below the 1st
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 20, 2026

Last Modified

August 25, 2026

Advisory Details (1)

Auto-updated Aug 20, 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-2026-18822(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 16× in last 7d / 67× 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. 2026-10-04 23:21 UTCEPSS rescore
  2. 2026-10-04 20:50 UTCGHSA enrichment
  3. 2026-10-03 16:44 UTCEG score recompute
  4. 2026-10-03 16:44 UTCGHSA enrichment
  5. 2026-10-02 09:55 UTCEG score recompute
  6. 2026-10-02 09:55 UTCGHSA enrichment
  7. 2026-10-01 19:49 UTCEPSS rescore
  8. 2026-10-01 09:00 UTCEG score recompute
  9. 2026-10-01 09:00 UTCGHSA enrichment
  10. 2026-09-30 15:02 UTCEPSS rescore
  11. 2026-09-30 08:03 UTCEG score recompute
  12. 2026-09-30 08:03 UTCGHSA enrichment
  13. 2026-09-29 15:20 UTCEPSS rescore
  14. 2026-09-29 04:44 UTCEG score recompute
  15. 2026-09-29 04:44 UTCGHSA enrichment
  16. 2026-09-28 13:51 UTCEPSS rescore
  17. 2026-09-28 03:47 UTCEG score recompute
  18. 2026-09-28 03:47 UTCGHSA enrichment
  19. 2026-09-27 13:47 UTCEPSS rescore
  20. 2026-09-27 02:47 UTCEG score recompute
  21. 2026-09-27 02:47 UTCGHSA enrichment
  22. 2026-09-26 15:58 UTCEPSS rescore
  23. 2026-09-25 00:38 UTCEG score recompute
  24. 2026-09-25 00:38 UTCGHSA enrichment
  25. 2026-09-23 20:40 UTCGHSA enrichment
Show 75 more
  1. 2026-09-22 19:44 UTCEG score recompute
  2. 2026-09-22 19:44 UTCGHSA enrichment
  3. 2026-09-21 17:51 UTCEG score recompute
  4. 2026-09-21 17:51 UTCGHSA enrichment
  5. 2026-09-20 16:29 UTCEG score recompute
  6. 2026-09-20 16:28 UTCGHSA enrichment
  7. 2026-09-19 15:25 UTCEG score recompute
  8. 2026-09-19 15:25 UTCGHSA enrichment
  9. 2026-09-18 19:27 UTCEPSS rescore
  10. 2026-09-18 14:26 UTCEG score recompute
  11. 2026-09-18 14:26 UTCGHSA enrichment
  12. 2026-09-17 13:10 UTCEG score recompute
  13. 2026-09-17 13:10 UTCGHSA enrichment
  14. 2026-09-16 14:07 UTCEPSS rescore
  15. 2026-09-16 12:12 UTCEG score recompute
  16. 2026-09-16 12:12 UTCGHSA enrichment
  17. 2026-09-16 05:14 UTCEPSS rescore
  18. 2026-09-15 11:15 UTCEG score recompute
  19. 2026-09-15 11:15 UTCGHSA enrichment
  20. 2026-09-14 10:06 UTCEG score recompute
  21. 2026-09-14 10:06 UTCGHSA enrichment
  22. 2026-09-13 16:46 UTCEPSS rescore
  23. 2026-09-13 08:44 UTCGHSA enrichment
  24. 2026-09-12 07:48 UTCEG score recompute
  25. 2026-09-12 07:48 UTCGHSA enrichment
  26. 2026-09-11 14:52 UTCEPSS rescore
  27. 2026-09-11 09:36 UTCEPSS rescore
  28. 2026-09-11 06:45 UTCEG score recompute
  29. 2026-09-11 06:45 UTCGHSA enrichment
  30. 2026-09-10 09:34 UTCEPSS rescore
  31. 2026-09-10 05:49 UTCGHSA enrichment
  32. 2026-09-09 04:52 UTCEG score recompute
  33. 2026-09-09 04:52 UTCGHSA enrichment
  34. 2026-09-08 22:00 UTCEPSS rescore
  35. 2026-09-08 03:56 UTCEG score recompute
  36. 2026-09-08 03:56 UTCGHSA enrichment
  37. 2026-09-07 16:01 UTCEPSS rescore
  38. 2026-09-07 02:59 UTCEG score recompute
  39. 2026-09-07 02:59 UTCGHSA enrichment
  40. 2026-09-06 13:47 UTCEPSS rescore
  41. 2026-09-06 01:59 UTCEG score recompute
  42. 2026-09-06 01:59 UTCGHSA enrichment
  43. 2026-09-05 01:02 UTCEG score recompute
  44. 2026-09-05 01:02 UTCGHSA enrichment
  45. 2026-09-04 05:06 UTCEPSS rescore
  46. 2026-09-04 00:05 UTCGHSA enrichment
  47. 2026-09-02 22:55 UTCEG score recompute
  48. 2026-09-02 22:55 UTCGHSA enrichment
  49. 2026-09-02 14:11 UTCEPSS rescore
  50. 2026-09-01 21:53 UTCEG score recompute
  51. 2026-09-01 21:53 UTCGHSA enrichment
  52. 2026-09-01 04:39 UTCEPSS rescore
  53. 2026-08-31 20:57 UTCGHSA enrichment
  54. 2026-08-30 20:01 UTCEG score recompute
  55. 2026-08-30 20:01 UTCGHSA enrichment
  56. 2026-08-30 19:17 UTCEPSS rescore
  57. 2026-08-30 01:22 UTCEPSS rescore
  58. 2026-08-29 19:04 UTCEG score recompute
  59. 2026-08-29 19:04 UTCGHSA enrichment
  60. 2026-08-28 21:41 UTCEPSS rescore
  61. 2026-08-28 18:05 UTCGHSA enrichment
  62. 2026-08-27 15:56 UTCEG score recompute
  63. 2026-08-27 15:56 UTCGHSA enrichment
  64. 2026-08-27 14:25 UTCEPSS rescore
  65. 2026-08-26 14:57 UTCEG score recompute
  66. 2026-08-26 14:57 UTCGHSA enrichment
  67. 2026-08-26 14:46 UTCEPSS rescore
  68. 2026-08-25 14:01 UTCEG score recompute▲ 1.10
  69. 2026-08-25 14:01 UTCGHSA enrichment
  70. 2026-08-25 14:00 UTCNVD updateCVSS v3 → 5.5
  71. 2026-08-25 13:48 UTCEPSS rescore
  72. 2026-08-24 16:58 UTCEG score recompute
  73. 2026-08-24 16:58 UTCGHSA enrichment
  74. 2026-08-23 18:13 UTCEG score recompute
  75. 2026-08-23 18:13 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2026-18822?
CVE-2026-18822 is a medium 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 cause a denial of service due to uncontrolled resource consumption when parsing directory records.
When was CVE-2026-18822 disclosed?
CVE-2026-18822 was first published on August 20, 2026, with the most recent update on August 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18822 actively exploited?
CVE-2026-18822 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (below the 1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-18822?
CVE-2026-18822 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-18822?
A fix for CVE-2026-18822 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-18822 are linked in the Vendor Advisories panel on this page.

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