CVE-2026-17009

MEDIUMNVD 5.55.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

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 CVSS 4.7 is lower than this score; a lower GitHub score revises it only when its advisory is newer than the CVE record's last change, and this advisory (published 2026-08-21) is not newer than that change (2026-08-25), so it does not.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 3 sources updated this week
5.5EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • 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 referenced (a reference tagged "Patch", often a source commit), but no release containing it is confirmed — find the release that contains it; until it is applied, mitigate (WAF / firewall / segmentation).

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 a NULL pointer dereference.

CVSS v3
5.5
EG Score
5.5MEDIUMmedium confidence
EG Risk
25
EG Risk 25/100

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 (value × EchelonGraph’s weight)
Severity55% × 45%
The EG Score, 5.5 of 10.
Exploitation<0.1% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that within your standard update timelines; until then, restrict network exposure of the affected system or apply the vendor's mitigation.
EPSS PROB
<0.1%
EPSS %ILE
below the 1st
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that within your standard update timelines; until then, restrict network exposure of the affected system or apply the vendor's mitigation.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 20, 2026

Last Modified

August 25, 2026

Advisory Details (1)

Auto-updated Aug 20, 2026
Fix referenced — no release confirmed yet.
Web page

Security Bulletin: Vulnerabilities in IBM AIX and PowerVM VIOS

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

Vendor Advisories for CVE-2026-17009(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 19× in last 7d / 69× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 133 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 33 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-12 16:33 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  2. 2026-10-12 16:29 UTCEG score recompute
  3. 2026-10-11 20:08 UTCEG score recompute
  4. 2026-10-11 17:21 UTCEG score recompute
  5. 2026-10-11 14:53 UTCEG score recompute
  6. 2026-10-11 13:48 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  7. 2026-10-10 19:59 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  8. 2026-10-09 20:06 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  9. 2026-10-09 08:05 UTCEG score recompute
  10. 2026-10-09 08:05 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  11. 2026-10-08 17:11 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  12. 2026-10-08 05:08 UTCEG score recompute
  13. 2026-10-08 05:08 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  14. 2026-10-07 23:47 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  15. 2026-10-07 01:15 UTCEG score recompute
  16. 2026-10-07 01:15 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  17. 2026-10-06 15:17 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  18. 2026-10-06 03:08 UTCEG score recompute
  19. 2026-10-06 03:08 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  20. 2026-10-05 17:42 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  21. 2026-10-05 01:32 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  22. 2026-10-04 03:05 UTCEG score recompute
  23. 2026-10-04 03:05 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  24. 2026-10-03 14:25 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  25. 2026-10-03 05:07 UTCEG score recompute
Show 75 more
  1. 2026-10-03 05:07 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  2. 2026-10-02 06:48 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  3. 2026-10-01 05:59 UTCEG score recompute
  4. 2026-10-01 05:59 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  5. 2026-09-30 15:02 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  6. 2026-09-30 08:07 UTCEG score recompute
  7. 2026-09-30 08:07 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  8. 2026-09-29 15:20 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  9. 2026-09-28 22:33 UTCEG score recompute
  10. 2026-09-28 22:33 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  11. 2026-09-28 13:51 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  12. 2026-09-28 00:41 UTCEG score recompute
  13. 2026-09-28 00:41 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  14. 2026-09-27 13:47 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  15. 2026-09-27 02:49 UTCEG score recompute
  16. 2026-09-27 02:49 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  17. 2026-09-26 15:58 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  18. 2026-09-25 17:18 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  19. 2026-09-24 16:09 UTCEG score recompute
  20. 2026-09-24 16:09 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  21. 2026-09-23 18:17 UTCEG score recompute
  22. 2026-09-23 18:16 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  23. 2026-09-22 19:44 UTCEG score recompute
  24. 2026-09-22 19:44 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  25. 2026-09-21 21:31 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  26. 2026-09-20 23:31 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  27. 2026-09-20 01:27 UTCEG score recompute
  28. 2026-09-20 01:27 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  29. 2026-09-19 03:34 UTCEG score recompute
  30. 2026-09-19 03:34 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  31. 2026-09-18 19:27 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  32. 2026-09-18 05:42 UTCEG score recompute
  33. 2026-09-18 05:42 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  34. 2026-09-17 07:49 UTCEG score recompute
  35. 2026-09-17 07:49 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  36. 2026-09-16 14:07 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  37. 2026-09-16 09:57 UTCEG score recompute
  38. 2026-09-16 09:57 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  39. 2026-09-16 05:14 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  40. 2026-09-15 12:04 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  41. 2026-09-14 14:10 UTCEG score recompute
  42. 2026-09-14 14:10 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  43. 2026-09-13 16:46 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  44. 2026-09-13 16:18 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  45. 2026-09-12 18:26 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  46. 2026-09-11 20:33 UTCEG score recompute
  47. 2026-09-11 20:33 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  48. 2026-09-11 14:52 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  49. 2026-09-11 09:36 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  50. 2026-09-10 22:40 UTCEG score recompute
  51. 2026-09-10 22:40 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  52. 2026-09-10 09:34 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  53. 2026-09-10 00:47 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  54. 2026-09-09 01:52 UTCEG score recompute
  55. 2026-09-09 01:52 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  56. 2026-09-08 22:00 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  57. 2026-09-07 16:01 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  58. 2026-09-07 10:45 UTCEG score recompute
  59. 2026-09-07 10:44 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  60. 2026-09-06 13:47 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  61. 2026-09-06 12:46 UTCEG score recompute
  62. 2026-09-06 12:46 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  63. 2026-09-05 14:54 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  64. 2026-09-04 17:00 UTCEG score recompute
  65. 2026-09-04 17:00 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  66. 2026-09-04 05:06 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  67. 2026-09-03 19:05 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  68. 2026-09-02 21:08 UTCEG score recompute
  69. 2026-09-02 21:08 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  70. 2026-09-02 14:11 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  71. 2026-09-01 21:12 UTCEG score recompute
  72. 2026-09-01 21:12 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  73. 2026-09-01 13:53 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  74. 2026-08-31 23:17 UTCGHSA enrichmentGHSA-46vx-2rvq-xfxq · GitHub CVSS 4.7
  75. 2026-08-31 01:24 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-17009?
CVE-2026-17009 is a medium-severity vulnerability; its CVE record was 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 a NULL pointer dereference.
When was the CVE record for CVE-2026-17009 published?
The CVE record for CVE-2026-17009 was published on August 20, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of August 25, 2026; the record at its source may have been updated since.
Is CVE-2026-17009 actively exploited?
CVE-2026-17009 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-2026-17009?
CVE-2026-17009 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-17009?
A fix for CVE-2026-17009 is referenced (a reference tagged "Patch", often a source commit), but EchelonGraph has no release containing it on record. Check that reference and the vendor's advisory for a release that contains the fix and update to it; until then, restrict network exposure of the affected system or apply the vendor's mitigation. The vendor advisories EchelonGraph has for CVE-2026-17009 are linked in the Vendor Advisories panel on this page.

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