CVE-2026-7323

HIGH EPSS 23.1%
Published Apr 28, 20262mo ago · Modified Jun 17, 20261w ago
7.3 CVSS 3.1
High
Find Similar
Published Apr 28, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago

Description

Memory safety bugs present in Thunderbird ESR 140.10.0 and Thunderbird 150.0.0. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150.0.1, Firefox ESR 140.10.1, Thunderbird 150.0.1, and Thunderbird 140.10.1.

CVSS Details

Base Score
7.3
Exploitability
3.9
Impact
3.4
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity Low
Availability Low

Threat Intelligence

EPSS Exploit Probability
23.1% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 2

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer Memory Safety
CWE-787 Out-of-bounds Write Memory Safety

Affected Products 4

VendorProductVersionRange
mozillafirefox* <140.10.1
mozillafirefox* <150.0.1
mozillathunderbird* <140.10.1
mozillathunderbird* <150.0.1

References 5

  • bugzilla.mozilla.org https://bugzilla.mozilla.org/buglist.cgi?bug_id=2028537%2C2029911%2C2031121%2C2033602
    Broken Link
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2026-35/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2026-36/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2026-38/
    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.