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CVE-2026-7321

Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component

Published: Apr 28, 2026Updated: Apr 28, 2026 Sources: CVE List NVD
NVD MITRE
9.6CVSS
CRITICAL

Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component. This vulnerability was fixed in Firefox ESR 140.10.1.

EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:CC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High

Weaknesses

CWE-120

Affected Products

Firefox
Mozilla

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2029461
bugzilla.mozilla.org
https://www.mozilla.org/security/advisories/mfsa2026-36/
mozilla.org

Timeline

Published
Apr 28, 2026
Last Updated
Apr 28, 2026

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