CVE-2026-45185

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

1.27% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 69.6% of scored records. A rank, not a probability.

NVD base score

9.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-05-12 00:00Z5 MO AGO

Last updated

2026-05-14 03:55Z5 MO AGO

Reserved

2026-05-10

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

• CWE-416Use After FreeVariant

Data version

5.2

Document digest

eeb52a1e901ec4dc24cd1aabc583d483d137731bb9e0e83018db9ada3dfa78a6

• exim.orghttps://exim.org
• code.exim.orghttps://code.exim.org/exim/wiki/wiki/EximSecurity
• exim.orghttps://exim.org/static/doc/security/CVE-2026-45185.txt
• xbow.comhttps://xbow.com/blog/dead-letter-cve-2026-45185-xbow-found-rce-exim
• news.ycombinator.comhttps://news.ycombinator.com/item?id=48111748
• www.openwall.comhttps://www.openwall.com/lists/oss-security/2026/05/12/4
• exim.orghttps://exim.org/static/doc/security/EXIM-Security-2026-05-01.1/
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/05/12/25