CVE-2026-6777: Vulnerability in Mozilla Firefox
Other issue in the Networking: DNS component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
AI Analysis
Technical Summary
CVE-2026-6777 is a vulnerability categorized as 'Other issue' in the Networking: DNS component of Mozilla Firefox. It has a CVSS 3.1 base score of 5.3 (medium severity) with an attack vector of network, low attack complexity, no privileges required, no user interaction, and impacts availability only. This vulnerability was addressed and fixed in Firefox 150 as part of a broad security update that resolved multiple memory safety and other security bugs. The vendor advisory explicitly states the fix is included in Firefox 150, confirming an official patch is available.
Potential Impact
The vulnerability impacts availability (denial-of-service) but does not affect confidentiality or integrity. There is no evidence of exploitation in the wild. The medium CVSS score reflects the potential for service disruption but not data compromise or code execution.
Mitigation Recommendations
Mozilla has provided an official fix for this vulnerability in Firefox 150. Users and administrators should update to Firefox 150 or later to remediate this issue. No additional mitigation actions are required beyond applying the official update.
CVE-2026-6777: Vulnerability in Mozilla Firefox
Description
Other issue in the Networking: DNS component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
CVSS v3.1
Score 5.3medium
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-6777 is a vulnerability categorized as 'Other issue' in the Networking: DNS component of Mozilla Firefox. It has a CVSS 3.1 base score of 5.3 (medium severity) with an attack vector of network, low attack complexity, no privileges required, no user interaction, and impacts availability only. This vulnerability was addressed and fixed in Firefox 150 as part of a broad security update that resolved multiple memory safety and other security bugs. The vendor advisory explicitly states the fix is included in Firefox 150, confirming an official patch is available.
Potential Impact
The vulnerability impacts availability (denial-of-service) but does not affect confidentiality or integrity. There is no evidence of exploitation in the wild. The medium CVSS score reflects the potential for service disruption but not data compromise or code execution.
Mitigation Recommendations
Mozilla has provided an official fix for this vulnerability in Firefox 150. Users and administrators should update to Firefox 150 or later to remediate this issue. No additional mitigation actions are required beyond applying the official update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-04-21T12:41:08.101Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-30/","vendor":"Mozilla"}]
Threat ID: 69e778a219fe3cd2cdd16611
Added to database: 4/21/2026, 1:16:18 PM
Last enriched: 5/27/2026, 8:00:35 PM
Last updated: 6/6/2026, 6:33:09 AM
Views: 40
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