CVE-2026-55013

HIGHPre-NVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-08-21. The CNA's CVSS baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 7.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Uncontrolled search path element in Windows Remote Help Defense allows an authorized attacker to perform spoofing locally.

CVSS v3
7.1
EG Score
7.1HIGHmedium confidence
EG Risk
32
EG Risk 32/100CISA 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
Severity71% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
37th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

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

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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

September 29, 2026

Advisory Details (1)

Auto-updated Aug 20, 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-2026-55013

Vendor Advisories for CVE-2026-55013(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 36× in last 7d / 163× 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 284 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-55013?
CVE-2026-55013 is a high vulnerability published on August 20, 2026. Uncontrolled search path element in Windows Remote Help Defense allows an authorized attacker to perform spoofing locally.
When was CVE-2026-55013 disclosed?
CVE-2026-55013 was first published on August 20, 2026, with the most recent update on September 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55013 actively exploited?
CVE-2026-55013 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (37th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-55013?
CVE-2026-55013 has a CVSS base score of 7.1 (the CNA's own assessment, by microsoft; NVD's own analysis pending).
How do I remediate CVE-2026-55013?
A fix for CVE-2026-55013 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-55013 are linked in the Vendor Advisories panel on this page.

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