CVE-2026-54120

CRITICALNVD 8.89.9▲
EchelonGraph scoreMEDIUM confidence

Score 9.9 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-24. NVD baseline CVSS 8.8; sources differ by 1.1.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
9.9EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Improper input validation in Microsoft Surface allows an authorized attacker to execute code over a network.

CVSS v3
8.8
EG Score
9.9(medium)
EG Risk
45(Track)
EG Risk 45/100SSVC: Track

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
Severity99% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
51%
KEV
Not listed

Published

July 23, 2026

Last Modified

August 28, 2026

Advisory Details (1)

Auto-updated Aug 4, 2026
Patch available. Sources: microsoft.
microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54120

Vendor Advisories for CVE-2026-54120(2)

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 70× in last 7d / 365× 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 449 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-54120?
CVE-2026-54120 is a critical vulnerability published on July 23, 2026. Improper input validation in Microsoft Surface allows an authorized attacker to execute code over a network.
When was CVE-2026-54120 disclosed?
CVE-2026-54120 was first published in the National Vulnerability Database on July 23, 2026, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54120 actively exploited?
CVE-2026-54120 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 49.4% of all scored CVEs.
What is the CVSS score of CVE-2026-54120?
CVE-2026-54120 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.9.
How do I remediate CVE-2026-54120?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54120, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-54120

Explore →

Is Your Infrastructure Affected by CVE-2026-54120?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs