CVE-2021-23874

HIGHNVD 8.29.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 8.2 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
8.2
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 1%CVSS: 8.2Exploit: NoneExposed: 0

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

Arbitrary Process Execution vulnerability in McAfee Total Protection (MTP) prior to 16.0.30 allows a local user to gain elevated privileges and execute arbitrary code bypassing MTP self-defense.

CVSS v3
8.2
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

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
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS
60.0%
KEV
⚠ Exploited

Published

February 10, 2021

Last Modified

November 3, 2025

Advisory Details (1)

Auto-updated Jun 2, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-23874

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 52× in last 7d / 226× 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 430 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2021-23874?
CVE-2021-23874 is a high vulnerability published on February 10, 2021. Arbitrary Process Execution vulnerability in McAfee Total Protection (MTP) prior to 16.0.30 allows a local user to gain elevated privileges and execute arbitrary code bypassing MTP self-defense.
When was CVE-2021-23874 disclosed?
CVE-2021-23874 was first published in the National Vulnerability Database on February 10, 2021, with the most recent update on November 3, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-23874 actively exploited?
Yes. CISA added CVE-2021-23874 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting McAfee McAfee Total Protection (MTP). KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2021-23874?
CVE-2021-23874 has a CVSS v3 base score of 8.2 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2021-23874?
CVE-2021-23874 affects McAfee McAfee Total Protection (MTP). The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2021-23874?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-23874, 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.

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