Description
Privilege escalation in the Remote Settings Client component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
Published: 2026-08-18
Score: 8.8 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Debian DSA Debian DSA DSA-6451-1 firefox-esr security update
History

Wed, 19 Aug 2026 15:45:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla thunderbird
CPEs cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
Vendors & Products Mozilla thunderbird

Wed, 19 Aug 2026 00:15:00 +0000


Tue, 18 Aug 2026 19:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-284

Tue, 18 Aug 2026 19:00:00 +0000

Type Values Removed Values Added
Description Privilege escalation in the Remote Settings Client component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, and Firefox ESR 153.1. Privilege escalation in the Remote Settings Client component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
References

Tue, 18 Aug 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 18 Aug 2026 15:30:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox
Vendors & Products Mozilla
Mozilla firefox

Tue, 18 Aug 2026 14:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-269
CWE-284

Tue, 18 Aug 2026 12:45:00 +0000

Type Values Removed Values Added
Description Privilege escalation in the Remote Settings Client component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, and Firefox ESR 153.1.
Title Privilege escalation in the Remote Settings Client component
References

Subscriptions

Mozilla Firefox Thunderbird
cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-08-18T18:55:01.763Z

Reserved: 2026-08-17T11:57:42.392Z

Link: CVE-2026-74942

cve-icon Vulnrichment

Updated: 2026-08-18T15:17:51.276Z

cve-icon NVD

Status : Analyzed

Published: 2026-08-18T13:17:30.673

Modified: 2026-08-19T15:30:46.490

Link: CVE-2026-74942

cve-icon Redhat

Severity : Important

Publid Date: 2026-08-18T12:23:29Z

Links: CVE-2026-74942 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-18T21:15:03Z

Weaknesses
  • CWE-266

    Incorrect Privilege Assignment

  • CWE-269

    Improper Privilege Management