CVE-2026-94057 Other in Exim
Attackers can inject crafted data into emails via SMTP smuggling, causing received messages to differ from sent ones, affecting Exim mail server integrity.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-94057?
CVE-2026-94057 is a medium-severity vulnerability in Exim Exim, published on 19 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Exim before 4.100.1 allows SMTP smuggling in which the received message does not match any sent message, and instead depends on crafted data sent after a rejection during DATA processing.
Weakness: CWE-93
Which versions are affected by CVE-2026-94057?
It affects 1 product.
Products include Exim Exim.
How do I fix CVE-2026-94057?
Upgrade to a fixed version.
Is CVE-2026-94057 being exploited?
There is no known exploitation of CVE-2026-94057 in the wild and no public exploit code.
Other vulnerabilities in Exim Exim
Sources
Also known as DEBIAN-CVE-2026-94057, GHSA-3mrg-v8x6-xfjw, UBUNTU-CVE-2026-94057.