CVE-2026-940574.0MediumCWE-93
CVE-2026-94057: Exim vulnerability
Fixed in 4.100.1 · Affected: Exim before 4.100.1 · Exploitation: not established
ExploitationNot established
Not in CISA KEV as of catalogue 2026.11.13 (13 Nov)
- In CISA KEV: not seen
- Exploited (reported): not seen
- Scanning observed: not seen
- Proof of concept public: not seen
- Not establishedNothing in the sources we check
0.2%probability of exploitation in the next 30 days
9th percentile
050100
Higher than 9% of scored CVEs
4.0MediumCVSS 3.1
LowMediumHighCrit.
DescriptionNVD
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.
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- Exim
- Published
- September 2026
Coverage1 article · 1 outlet
First in our coverage: SecurityOnline, 21 Sep.
- Exim Fixes Proxy Protocol Bugs and SMTP Smuggling FlawSecurityOnline · first in our coverage · mentions it in passing
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