Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-94054

CVE-2026-94054MEDIUM

Exim before 4.100.1, when Proxy-Protocol is used with an attacker-controlled proxy, has an out-of-bounds write.

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  L  N  N    5.3   .0027   17.2     —

AFFECTED
  Product  Versions  Fixed
  Exim     4.83 –    —

TIMELINE
  Sep 19  Reserved by mitre
  Sep 19  Published (CNA: mitre)
  Sep 24  RESCORED — CVE-2026-94054 (Exim). CVSS 7 → 5.3 (NVD).

CWE-787 · CNA: mitre · CVSS v3.1 · 1 reference · NVD status: Analyzed

Description

Exim before 4.100.1, when Proxy-Protocol is used with an attacker-controlled proxy, has an out-of-bounds write.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
September 19, 2026	Reserved	Reserved by mitre
September 19, 2026	Published	Published (CNA: mitre)
September 24, 2026	RESCORED	RESCORED — CVE-2026-94054 (Exim). CVSS 7 → 5.3 (NVD).

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Exim	Exim	—	4.83	—

Weaknesses

CWE-787

References (1)

https://lists.exim.org/lurker/message/20260918.121220.0f87338e.en.html [Vendor Advisory]

Authoritative record: CVE-2026-94054 at cve.org

Vendors: exim

Weaknesses: CWE-787

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-94054 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Saturday, October 3, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.