CVE-2026-7321

CRITICAL EPSS 17.1%
Published Apr 28, 20262mo ago · Modified Jun 17, 20261w ago
9.6 CVSS 3.1
Critical
Find Similar
Published Apr 28, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago

Description

Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component. This vulnerability was fixed in Firefox 150, Thunderbird 150, Firefox ESR 140.10.1, and Thunderbird 140.10.1.

CVSS Details

Base Score
9.6
Exploitability
2.8
Impact
6.0
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Changed
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
17.1% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-120

Affected Products 4

VendorProductVersionRange
mozillafirefox* <140.10.1
mozillafirefox* <150.0
mozillathunderbird* <140.10.1
mozillathunderbird* <150.0

References 5

  • bugzilla.mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=2029461
    Permissions Required
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2026-30/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2026-33/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2026-36/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2026-39/
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.