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ExploitedIn CISA KEVFix available

CVE-2019-8526

Exploitation confirmed. First attested on 2023-04-17 by CISA-ADP, CISA KEV, GCVE · kevintel.

  • Published2019-12-18
  • Fixed in10.14.4
  • WeaknessCWE-416

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2019-12-1818:15CVE publishedNVD
  2. 2023-04-17Added to the CISA KEV catalogCISA KEV
  3. 2023-04-17Listed as exploited by GCVEGCVE
  4. 2023-04-17Exploitation first reportedCISA KEV
  5. 2025-01-2917:41SSVC exploitation set to activeCISA-ADP

Versions per branch

NVD
Apple mac os x
BranchAffectedFixed in
10.14< 10.14.410.14.4

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As apple, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Apple macOS
    Affected
    • < macOS Mojave 10.14.4fixed in macOS Mojave 10.14.4custom

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2019-12-18

Fix

  1. Update Apple mac os x to 10.14.4
  2. CISA’s required action: Apply updates per vendor instructions.due 2023-05-08

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2023-04-17
Patch Due Date
2023-05-08
Ransomware Use
Unknown
Required Action
Apply updates per vendor instructions.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2019-12-18
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-p8m9-gxw7-g5pf

Frequently asked questions

What is CVE-2019-8526?

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.

Is CVE-2019-8526 actively exploited?

Yes. CVE-2019-8526 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2023-05-08.

What is the CVSS score for CVE-2019-8526?

CVE-2019-8526 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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