CVE-2026-17100

HIGHPre-NVD 8.28.2
EchelonGraph scoreMEDIUM confidence

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

Score 8.2 from GitHub Security Advisory (severity: HIGH) published 2026-08-19. A secondary CVSS source baseline 8.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this week
8.2EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 8.2Exploit: 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).

Power Systems Firmware FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, FW950.00 through FW950.H2, OP940.00 through OP940.a1, and OP940.00 - OP940.81 is affected by a vulnerability in the service processor mailbox interface. An attacker with authenticated service-level access to the BMC/FSP can exploit this vulnerability, allowing arbitrary code to be executed in the host firmware runtime, giving full control over the managed system, resulting in a confidentiality, integrity, and availability impact to the managed system.

CVSS v3
8.2
EG Score
8.2HIGHmedium confidence
EG Risk
37
EG Risk 37/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity82% × 45%
Impact severity (EG Severity): CVSS 8.2 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 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 low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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
0.2%
EPSS %ILE
5th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (8.2): severity, escalated by confirmed exploitation. This CVE's 8.2 is its impact severity (EG Severity), not escalated.

EG Severity
8.2 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

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 total (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)14 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 total (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 19, 2026

Last Modified

August 25, 2026

Advisory Details (1)

Auto-updated Aug 19, 2026
Fix referenced — no release confirmed yet.
Web page

Security Bulletin: This Power System update is being released to address CVE-2026-17100

https://www.ibm.com/support/pages/node/7283236

Vendor Advisories for CVE-2026-17100(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 10× in last 7d / 75× 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 201 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 101 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  2. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  3. 2026-10-18 04:00 UTCEG score recompute
  4. 2026-10-17 17:58 UTCEG score recompute
  5. 2026-10-17 17:58 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  6. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  7. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  8. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  9. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  10. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  11. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  12. 2026-10-12 16:29 UTCEG score recompute
  13. 2026-10-11 20:08 UTCEG score recompute
  14. 2026-10-11 17:21 UTCEG score recompute
  15. 2026-10-11 14:53 UTCEG score recompute
  16. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  17. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  18. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  19. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  20. 2026-10-08 07:40 UTCEG score recompute
  21. 2026-10-08 07:39 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  22. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  23. 2026-10-07 06:47 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  24. 2026-10-06 19:23 UTCEG score recompute
  25. 2026-10-06 19:23 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
Show 75 more
  1. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  2. 2026-10-06 07:57 UTCEG score recompute
  3. 2026-10-06 07:57 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  4. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  5. 2026-10-05 17:10 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  6. 2026-10-05 05:11 UTCEG score recompute
  7. 2026-10-05 05:11 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  8. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  9. 2026-10-04 15:46 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  10. 2026-10-04 04:23 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  11. 2026-10-03 16:55 UTCEG score recompute
  12. 2026-10-03 16:55 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  13. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  14. 2026-10-02 21:36 UTCEG score recompute
  15. 2026-10-02 21:36 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  16. 2026-10-02 10:09 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  17. 2026-10-01 22:46 UTCEG score recompute
  18. 2026-10-01 22:46 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  19. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  20. 2026-10-01 07:59 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  21. 2026-09-30 20:34 UTCEG score recompute
  22. 2026-09-30 20:34 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  23. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  24. 2026-09-30 08:42 UTCEG score recompute
  25. 2026-09-30 08:42 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  26. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  27. 2026-09-28 21:42 UTCEG score recompute
  28. 2026-09-28 21:42 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  29. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  30. 2026-09-28 05:41 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  31. 2026-09-27 18:17 UTCEG score recompute
  32. 2026-09-27 18:17 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  33. 2026-09-27 13:47 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  34. 2026-09-27 06:54 UTCEG score recompute
  35. 2026-09-27 06:54 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  36. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  37. 2026-09-25 07:10 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  38. 2026-09-24 19:44 UTCEG score recompute
  39. 2026-09-24 19:44 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  40. 2026-09-24 07:33 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  41. 2026-09-23 20:09 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  42. 2026-09-23 07:13 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  43. 2026-09-22 19:49 UTCEG score recompute
  44. 2026-09-22 19:49 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  45. 2026-09-22 06:42 UTCEG score recompute
  46. 2026-09-22 06:42 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  47. 2026-09-21 19:19 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  48. 2026-09-21 07:55 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  49. 2026-09-20 20:31 UTCEG score recompute
  50. 2026-09-20 20:31 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  51. 2026-09-20 09:08 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  52. 2026-09-19 21:37 UTCEG score recompute
  53. 2026-09-19 21:37 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  54. 2026-09-19 10:14 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  55. 2026-09-18 21:44 UTCEG score recompute
  56. 2026-09-18 21:44 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  57. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  58. 2026-09-18 08:54 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  59. 2026-09-17 21:29 UTCEG score recompute
  60. 2026-09-17 21:29 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  61. 2026-09-17 07:29 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  62. 2026-09-16 20:05 UTCEG score recompute
  63. 2026-09-16 20:05 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  64. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  65. 2026-09-16 06:29 UTCEG score recompute
  66. 2026-09-16 06:29 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  67. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  68. 2026-09-15 19:06 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  69. 2026-09-15 07:42 UTCEG score recompute
  70. 2026-09-15 07:42 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  71. 2026-09-14 20:18 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  72. 2026-09-14 08:52 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  73. 2026-09-13 21:29 UTCEG score recompute
  74. 2026-09-13 21:29 UTCGHSA enrichmentGHSA-w82q-x75m-xp3p · GitHub severity HIGH · GitHub CVSS 8.2
  75. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.1% · 1st percentile

Frequently asked(5)

What is CVE-2026-17100?
CVE-2026-17100 is a high-severity vulnerability; its CVE record was published on August 19, 2026. Power Systems Firmware FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, FW950.00 through FW950.H2, OP940.00 through OP940.a1, and OP940.00 - OP940.81 is affected by a vulnerability in the service processor mailbox interface. An attacker with authenticated service-level access to…
When was the CVE record for CVE-2026-17100 published?
The CVE record for CVE-2026-17100 was published on August 19, 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-2026-17100 actively exploited?
CVE-2026-17100 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (5th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-17100?
CVE-2026-17100 has a CVSS base score of 8.2 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-17100?
A fix for CVE-2026-17100 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-2026-17100 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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