CVE-2026-940553.7LowCWE-416
CVE-2026-94055: 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
0.3%probability of exploitation in the next 30 days
21st percentile
050100
Higher than 21% of scored CVEs
3.7LowCVSS 3.1
LowMediumHighCrit.
DescriptionNVD
Exim before 4.100.1, when certain non-default TLS settings are used with GnuTLS, has a use-after-free.
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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