CVE-2026-43964

HIGH EPSS 22.4%
Published May 4, 20261mo ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published May 4, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago

Description

Postfix before 3.8.16, 3.9 before 3.9.10, and 3.10 before 3.10.9 sometimes allows a buffer over-read and process crash via an enhanced status code that lacks text after the third number.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
22.4% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-193

Affected Products 3

VendorProductVersionRange
postfixpostfix* <3.8.16
postfixpostfix*≥3.9.0  –  <3.9.10
postfixpostfix*≥3.10.0  –  <3.10.9

References 2

  • openwall.com http://www.openwall.com/lists/oss-security/2026/05/04/30
    Mailing ListThird Party Advisory
  • mail-archive.com https://www.mail-archive.com/postfix-announce@postfix.org/msg00110.html
    Mailing ListThird Party Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.