CVE-2021-30983

HIGHNVD 7.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-06-27), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 7.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, nvd
Trending — 3 sources updated this weekExploited in the wild
7.8
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 3%CVSS: 7.8Exploit: NoneExposed: 0

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

A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 15.2 and iPadOS 15.2. An application may be able to execute arbitrary code with kernel privileges.

CVSS v3
7.8
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
85.7%
KEV
⚠ Exploited

Published

August 24, 2021

Last Modified

October 23, 2025

Advisory Details (2)

Auto-updated Jun 4, 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-2021-30983
generic

About the security content of iOS 15.2 and iPadOS 15.2 - Apple Support

https://support.apple.com/en-us/HT212976

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 21× in last 7d / 66× 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 133 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2021-30983?
CVE-2021-30983 is a high vulnerability published on August 24, 2021. A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 15.2 and iPadOS 15.2. An application may be able to execute arbitrary code with kernel privileges.
When was CVE-2021-30983 disclosed?
CVE-2021-30983 was first published in the National Vulnerability Database on August 24, 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-2021-30983 actively exploited?
Yes. CISA added CVE-2021-30983 to the Known Exploited Vulnerabilities catalog on June 27, 2022, affecting Apple iOS and iPadOS. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2021-30983?
CVE-2021-30983 has a CVSS v3 base score of 7.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2021-30983?
CVE-2021-30983 affects Apple iOS and iPadOS. 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-2021-30983?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-30983, 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-2021-30983

Explore →

Is Your Infrastructure Affected by CVE-2021-30983?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs