CVE-2026-43964

LOW

CVSS v3.1: 3.7 · EPSS: 0.0031 (22.4 percentile)

NetworkNo privilegesNo user interaction

Source data as of:

At a glance

Severity
LOW
CVSS
3.7 v3.1 · NVD
EPSS
0.0031 (22.4 percentile) · FIRST.org
CISA KEV
No
Attack conditions (CVSS vector)
NetworkNo privilegesNo user interaction · Source: NVD Vector
Affected vendors
postfix
Published
2026-05-04 · Modified: 2026-06-30
References
Jump to references (8)

CVSS / EPSS / KEV

CVSS v3.1 3.7 / 10 LOW Source: NVD
EPSS 0.0031 22.4 percentile Source: FIRST.org
CISA KEV No Source: CISA

Source — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. Data & Sources

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.

Record details

CVE ID
CVE-2026-43964
CVSS (v3.1)
3.7 (LOW)
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Exploitability subscore
2.2
Impact subscore
1.4
EPSS
0.0031 (22.4 percentile) — 2026-06-30
CISA KEV
No
Weakness (CWE)
CWE-193
Affected vendors
postfix
Affected configurations (CPE)
3
Published
2026-05-04
Modified
2026-06-30
Status
Modified

References

Reference URLs as listed by NVD, grouped by a mechanical match on the link's host/pattern. Labels describe the link type only.

Related records

Other records sharing a factual facet, for cross-reference. A descriptive neighbourhood — ordering does not imply priority and is not a recommendation.

Same weakness type (CWE)

CVE-2006-10003 CRITICAL CVSS 9.8 CVE-2026-8357 HIGH CVSS 7.8 CVE-2026-33997 MEDIUM CVSS 6.8 CVE-2026-42015 MEDIUM CVSS 5.3

Published the same year

CVE-2026-0881 CRITICAL CVSS 10.0 CVE-2026-2760 CRITICAL CVSS 10.0 CVE-2026-2761 CRITICAL CVSS 10.0 CVE-2026-2768 CRITICAL CVSS 10.0
← Back to all records