CVE-2021-1782

CRITICALNVD 7.09.0▲
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 7.0 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
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 2%CVSS: 7.0Exploit: cisa kev · ssvc active · public exploitExposed: 0

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

A race condition was addressed with improved locking. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, watchOS 7.3, tvOS 14.4, iOS 14.4 and iPadOS 14.4. A malicious application may be able to elevate privileges. Apple is aware of a report that this issue may have been actively exploited..

CVSS v3
7.0
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 PROB
2%
EPSS %ILE
82%
KEV
⚠ Exploited

Published

April 2, 2021

Last Modified

October 23, 2025

Advisory Details (5)

Auto-updated Jun 11, 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-2021-1782
generic🔴 Active Exploitation

About the security content of tvOS 14.4 - Apple Support

https://support.apple.com/en-us/HT212149
generic🔴 Active Exploitation

About the security content of watchOS 7.3 - Apple Support

https://support.apple.com/en-us/HT212148
generic🔴 Active Exploitation

About the security content of macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave - Apple Support

https://support.apple.com/en-us/HT212147
generic🔴 Active Exploitation

About the security content of iOS 14.4 and iPadOS 14.4 - Apple Support

https://support.apple.com/en-us/HT212146

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 56× in last 7d / 235× 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 743 total refreshes for this CVE.

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

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2021-1782?
CVE-2021-1782 is a critical vulnerability published on April 2, 2021. A race condition was addressed with improved locking. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, watchOS 7.3, tvOS 14.4, iOS 14.4 and iPadOS 14.4. A malicious application may be able to elevate privileges. Apple is aware of a…
When was CVE-2021-1782 disclosed?
CVE-2021-1782 was first published in the National Vulnerability Database on April 2, 2021, with the most recent update on October 23, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-1782 actively exploited?
Yes. CISA added CVE-2021-1782 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting Apple Multiple Products. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2021-1782?
CVE-2021-1782 has a CVSS v3 base score of 7.0 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2021-1782?
CVE-2021-1782 affects Apple Multiple Products. 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-2021-1782?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-1782, 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-2021-1782

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