Exploitation timeline
Threadlinqs has recorded 5 Exim CVEs published between and . The busiest month was 2026-09 (4 new CVEs). None of them is listed in CISA KEV yet.
Most exploited vulnerabilities
Ranked with CISA KEV listings first, then EPSS exploit probability, then CVSS score. Showing 5 of 5 tracked Exim CVEs.
- CVE-2026-94055low 3.7EPSS 0.3%
- CVE-2026-94054high 7EPSS 0.3%
- CVE-2026-94056high 7.5EPSS 0.2%
- CVE-2026-94057medium 4EPSS 0.2%
- CVE-2026-45185critical 9.8EPSS 0.1%
Products affected
Threadlinqs normalises CPE and CNA product records across all 5 CVEs; 1 distinct Exim product is affected. The most frequently affected:
- Exim 5 CVEs
Threat activity
2 tracked threat campaigns reference Exim products or exploit Exim CVEs:
- Exim Directory Traversal (CVE-2026-66140, CVSS 8.4) and .forward Privilege Escalation (CVE-2026-66141, CVSS 7.4) Enable Local Privilege Escalation via Queue-Name Argument and force_command AbuseHIGH
- Dead.Letter — CVE-2026-45185 Unauthenticated Pre-Auth RCE in Exim via Use-After-Free in BDAT/GnuTLSCRITICAL
How to prioritise Exim patching
This order follows the data Threadlinqs holds for Exim, not a generic severity checklist:
- No Exim CVE is in CISA KEV yet, so rank by exploit probability instead.
- Outside KEV, the highest EPSS scores are CVE-2026-94055 (0.3%), CVE-2026-94054 (0.3%), CVE-2026-94056 (0.2%).
- 1 CVE scores Critical and 2 High on CVSS v3 (maximum 9.8, average 6.4); sequence these after KEV and high-EPSS items.
About this data
Vendor attribution comes from the CNA and CPE product records of each CVE, folded to one vendor name; CVSS, EPSS and KEV status are read from the Threadlinqs CVE catalog; campaign and actor links come from tracked threat records. Counts reflect the data as of 2026-10-05 and refresh daily.