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[UPDATE] [low] Postfix: Vulnerability allows denial of service

lowCVE-2026-43964
A remote, anonymous attacker can exploit a vulnerability in Postfix to conduct a denial of service attack.

CSIRTS triage

vendor: Postfixproduct: PostfixDenial of service
What
A vulnerability allows a denial of service attack.
Who is affected
Remote, anonymous attackers targeting Postfix installations.
Urgency
Remediation is low urgency due to the low severity of the vulnerability.
Action
Consider applying updates when available.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity
low
Published
2026-07-07
Exploitation
Not in CISA KEV at last sync
Language
Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1352

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-43964coverage & exploitation statusNVD · CVE.org

Recent advisories for Postfix

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from CERT-Bund (BSI) Security Advisories