CVE-2026-74942
Received Received - Intake

Privilege Escalation in Firefox Remote Settings Client

Vulnerability report for CVE-2026-74942, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-08-18

Last updated on: 2026-08-18

Assigner: Mozilla Corporation

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.

CVSS Scores

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Meta Information

Published
2026-08-18
Last Modified
2026-08-18
Generated
2026-08-18
AI Q&A
2026-08-18
EPSS Evaluated
N/A
NVD
EUVD

Affected Vendors & Products

Showing 8 associated CPEs
Vendor Product Version / Range
mozilla firefox to 154 (inc)
mozilla firefox_esr to 115.39 (inc)
mozilla firefox_esr to 140.14 (inc)
mozilla firefox_esr to 153.1 (inc)
mozilla firefox 154
mozilla firefox_esr 115.39
mozilla firefox_esr 140.14
mozilla firefox_esr 153.1

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

Attack-Flow Graph

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Executive Summary

This is a privilege escalation vulnerability in Firefox's Remote Settings Client component. It allows an attacker to gain higher access levels than intended, potentially taking control of affected systems.

Impact Analysis

If exploited, this flaw could let attackers bypass security restrictions, install malware, steal data, or perform unauthorized actions on your system. Users of vulnerable Firefox versions are at risk.

Compliance Impact

The provided CVE data does not specify how this vulnerability affects compliance with standards like GDPR or HIPAA. The description only mentions a privilege escalation issue in Firefox's Remote Settings Client component.

Mitigation Strategies

Update Firefox to version 154 or later, Firefox ESR to version 115.39 or later, Firefox ESR to version 140.14 or later, or Firefox ESR to version 153.1 or later to address the privilege escalation in the Remote Settings Client component.

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