CVE-2021-47974

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-16. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
7.8EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 7.8Exploit: Elevated riskExposed services: Not assessed

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

VX Search 13.5.28 contains an unquoted service path vulnerability in both VX Search Server and VX Search Enterprise services that allows local attackers to escalate privileges. Attackers can place malicious executables in unquoted path directories like C:\Program Files\VX Search to execute arbitrary code with LocalSystem privileges when services restart.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
51
EG Risk 51/100CISA 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
Severity78% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.1%
EPSS %ILE
1st
KEV
Not listed

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

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

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

May 16, 2026

Last Modified

May 18, 2026

Advisory Details (3)

Auto-updated May 16, 2026
🔬 Proof of concept available. No fix on record yet.
generic

VX Search - File Search

https://www.vxsearch.com
generic

VX Search 13.5.28 Unquoted Service Path Privilege Escalation | Advisories | VulnCheck

https://www.vulncheck.com/advisories/vx-search-unquoted-service-path-privilege-escalation
generic🟡 PoC Available

VX Search 13.5.28 - 'Multiple' Unquoted Service Path - Windows local Exploit

https://www.exploit-db.com/exploits/50026

Vendor Advisories for CVE-2021-47974(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 6× in last 7d / 28× 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 276 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2021-47974?
CVE-2021-47974 is a high vulnerability published on May 16, 2026. VX Search 13.5.28 contains an unquoted service path vulnerability in both VX Search Server and VX Search Enterprise services that allows local attackers to escalate privileges. Attackers can place malicious executables in unquoted path directories like C:\Program Files\VX Search to execute…
When was CVE-2021-47974 disclosed?
CVE-2021-47974 was first published on May 16, 2026, with the most recent update on May 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-47974 actively exploited?
CVE-2021-47974 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2021-47974?
CVE-2021-47974 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2021-47974?
No fix for CVE-2021-47974 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2021-47974 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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