CVE-2019-8526

CRITICALNVD 7.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2023-04-17), 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, 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: 1%CVSS: 7.8Exploit: cisa kev · ssvc activeExposed: 0

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

A use after free issue was addressed with improved memory management. This issue is fixed in macOS Mojave 10.14.4. An application may be able to gain elevated 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 PROB
1%
EPSS %ILE
51%
KEV
⚠ Exploited

Published

December 18, 2019

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-2019-8526
generic

About the security content of macOS Mojave 10.14.4, Security Update 2019-002 High Sierra, Security Update 2019-002 Sierra - Apple Support

https://support.apple.com/HT209600

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 57× 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 672 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2019-8526?
CVE-2019-8526 is a critical vulnerability published on December 18, 2019. A use after free issue was addressed with improved memory management. This issue is fixed in macOS Mojave 10.14.4. An application may be able to gain elevated privileges.
When was CVE-2019-8526 disclosed?
CVE-2019-8526 was first published in the National Vulnerability Database on December 18, 2019, 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-2019-8526 actively exploited?
Yes. CISA added CVE-2019-8526 to the Known Exploited Vulnerabilities catalog on April 17, 2023, affecting Apple macOS. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2019-8526?
CVE-2019-8526 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-2019-8526?
CVE-2019-8526 affects Apple macOS. 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-2019-8526?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-8526, 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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