CVE-2026-74985: Vulnerability in Mozilla Firefox
CVE-2026-74985 is a critical privilege escalation vulnerability in the Enterprise Policies component of Mozilla Firefox. This flaw allows an attacker to gain elevated privileges within the affected software. The issue was addressed and fixed in Firefox version 154 and Firefox ESR 153.1, as well as Thunderbird 154 and Thunderbird 153.1.
AI Analysis
Technical Summary
CVE-2026-74985 is a privilege escalation vulnerability affecting the Enterprise Policies component in Mozilla Firefox. The vulnerability permits unauthorized privilege elevation, potentially allowing an attacker to execute actions with higher privileges than intended. Mozilla fixed this vulnerability in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1. The CVSS v3.1 base score is 9.8, indicating a critical severity with network attack vector, low attack complexity, no privileges required, no user interaction, and impacts to confidentiality, integrity, and availability.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escalate privileges within the Firefox environment, potentially leading to full compromise of the affected application. The critical CVSS score of 9.8 reflects the high impact on confidentiality, integrity, and availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1. Users and administrators should upgrade to these versions or later to remediate the issue. No additional mitigation actions are required beyond applying the official updates.
CVE-2026-74985: Vulnerability in Mozilla Firefox
Description
CVE-2026-74985 is a critical privilege escalation vulnerability in the Enterprise Policies component of Mozilla Firefox. This flaw allows an attacker to gain elevated privileges within the affected software. The issue was addressed and fixed in Firefox version 154 and Firefox ESR 153.1, as well as Thunderbird 154 and Thunderbird 153.1.
CVSS v3.1
Score 9.8critical
Affected software
Mozilla
Firefox
Mozilla
Thunderbird
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-74985 is a privilege escalation vulnerability affecting the Enterprise Policies component in Mozilla Firefox. The vulnerability permits unauthorized privilege elevation, potentially allowing an attacker to execute actions with higher privileges than intended. Mozilla fixed this vulnerability in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1. The CVSS v3.1 base score is 9.8, indicating a critical severity with network attack vector, low attack complexity, no privileges required, no user interaction, and impacts to confidentiality, integrity, and availability.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escalate privileges within the Firefox environment, potentially leading to full compromise of the affected application. The critical CVSS score of 9.8 reflects the high impact on confidentiality, integrity, and availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1. Users and administrators should upgrade to these versions or later to remediate the issue. No additional mitigation actions are required beyond applying the official updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-08-17T11:59:18.049Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-74/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-77/","vendor":"Mozilla"}]
Threat ID: 6a84550fc6e8be0332367760
Added to database: 08/18/2026, 12:50:23 UTC
Last enriched: 09/11/2026, 21:48:03 UTC
Last updated: 10/02/2026, 02:46:06 UTC
Views: 45
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