CVE-2026-74801

HIGHPre-NVD 8.28.2—
EchelonGraph scoreMEDIUM confidence

Score 8.2 from GitHub Security Advisory (severity: HIGH) published 2026-08-17. A secondary CVSS source baseline 8.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
8.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 8.2Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

SiYuan before 3.7.4 fails to properly escape workspace directory paths when constructing command-line arguments for the elevated elevator.exe helper process. Attackers can create a malicious workspace directory with command metacharacters in its path and trigger the Microsoft Defender exclusion flow to execute arbitrary commands with administrator privileges after UAC approval.

CVSS v3
8.2
EG Score
8.2HIGHmedium confidence
EG Risk
53
EG Risk 53/100CISA 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
Severity82% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.2%
EPSS %ILE
9th
KEV
Not listed

CISA SSVCTrack at low, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (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 17, 2026

Last Modified

August 26, 2026

Advisory Details (2)

Auto-updated Aug 17, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

SiYuan before 3.7.4 Local Privilege Escalation via elevator.exe | Advisories | VulnCheck

https://www.vulncheck.com/advisories/siyuan-before-local-privilege-escalation-via-elevator-exe
github Patch Available🟡 PoC Available

Unescaped workspace path concatenated into a UAC-elevated command line allows local privilege escalation via the bundled elevator.exe helper · Advisory · siyuan-note/siyuan · GitHub

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-vmp7-pm7g-ghcc

Vendor Advisories for CVE-2026-74801(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 20× in last 7d / 97× 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 176 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-74801?
CVE-2026-74801 is a high vulnerability published on August 17, 2026. SiYuan before 3.7.4 fails to properly escape workspace directory paths when constructing command-line arguments for the elevated elevator.exe helper process. Attackers can create a malicious workspace directory with command metacharacters in its path and trigger the Microsoft Defender exclusion…
When was CVE-2026-74801 disclosed?
CVE-2026-74801 was first published on August 17, 2026, with the most recent update on August 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74801 actively exploited?
CVE-2026-74801 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (9th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-74801?
CVE-2026-74801 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-2026-74801?
A fix for CVE-2026-74801 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-74801 are linked in the Vendor Advisories panel on this page.

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