CVE-2025-43520

CRITICALNVD 5.59.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2026-03-20), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 5.5 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: 0%CVSS: 5.5Exploit: cisa kev · ssvc activeExposed: 0

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

A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.2 and iPadOS 18.7.2, iOS 26.1 and iPadOS 26.1, macOS Sequoia 15.7.2, macOS Sonoma 14.8.2, macOS Tahoe 26.1, tvOS 26.1, visionOS 26.1, watchOS 26.1. A malicious application may be able to cause unexpected system termination or write kernel memory.

CVSS v3
5.5
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
0%
EPSS %ILE
33%
KEV
⚠ Exploited

Published

December 12, 2025

Last Modified

April 3, 2026

Advisory Details (10)

Auto-updated May 20, 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-2025-43520
generic

The Proliferation of DarkSword: iOS Exploit Chain Adopted by Multiple Threat Actors | Google Cloud Blog

https://cloud.google.com/blog/topics/threat-intelligence/darksword-ios-exploit-chain/
generic

About the security content of watchOS 26.1 - Apple Support

https://support.apple.com/en-us/125639
generic

About the security content of visionOS 26.1 - Apple Support

https://support.apple.com/en-us/125638
generic

About the security content of tvOS 26.1 - Apple Support

https://support.apple.com/en-us/125637
generic

About the security content of macOS Sonoma 14.8.2 - Apple Support

https://support.apple.com/en-us/125636
generic

About the security content of macOS Sequoia 15.7.2 - Apple Support

https://support.apple.com/en-us/125635
generic

About the security content of macOS Tahoe 26.1 - Apple Support

https://support.apple.com/en-us/125634
generic

About the security content of iOS 18.7.2 and iPadOS 18.7.2 - Apple Support

https://support.apple.com/en-us/125633
generic

About the security content of iOS 26.1 and iPadOS 26.1 - Apple Support

https://support.apple.com/en-us/125632

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 45× in last 7d / 243× 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 520 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2025-43520?
CVE-2025-43520 is a critical vulnerability published on December 12, 2025. A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.2 and iPadOS 18.7.2, iOS 26.1 and iPadOS 26.1, macOS Sequoia 15.7.2, macOS Sonoma 14.8.2, macOS Tahoe 26.1, tvOS 26.1, visionOS 26.1, watchOS 26.1. A malicious application may be able to cause…
When was CVE-2025-43520 disclosed?
CVE-2025-43520 was first published in the National Vulnerability Database on December 12, 2025, with the most recent update on April 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-43520 actively exploited?
Yes. CISA added CVE-2025-43520 to the Known Exploited Vulnerabilities catalog on March 20, 2026, 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-2025-43520?
CVE-2025-43520 has a CVSS v3 base score of 5.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2025-43520?
CVE-2025-43520 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-2025-43520?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-43520, 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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