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CVE-2026-74935

Published: Aug 18, 2026Updated: Aug 21, 2026 Sources: CVE List NVDCWE-269
8.8HIGH
NVD MITRE
EPSS Score
0.3%
Top 76.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

Privilege escalation in the DOM: Networking 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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-269

Affected Products

Mozilla
oss-project·USaka mozilla corp.
FirefoxOn-premDesktop App
Consumer Software / browser
ThunderbirdOn-premDesktop App
Communications / email-server-client
and 2 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2026-74935?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2051013
bugzilla.mozilla.org
https://www.mozilla.org/security/advisories/mfsa2026-74/
mozilla.org
https://www.mozilla.org/security/advisories/mfsa2026-75/
mozilla.org
and 5 more references View all →
News mentions
1

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