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CVE-2026-94056

7.5, high

Exim before 4.100.1, when Proxy-Protocol is used with an attacker-controlled proxy, allows attackers to read certain uninitialized data…

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
7.5, high high CVSS v3.1
EPSS, next 30 days
0.2% higher than 13.8% of scored CVEs
Exploitation
No public evidence
Published
19 Sept 202629 days ago

Description

Exim before 4.100.1, when Proxy-Protocol is used with an attacker-controlled proxy, allows attackers to read certain uninitialized data from stack memory.

Details

Vendor
Exim
Product
Exim
Weakness
CWE-908 (opens in a new tab)
Status
Analyzed
Updated
24 Sept 2026
Assigner
cve@mitre.org

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

References 1

Advisories 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Exim CVEs

Every Exim CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2019-16928 Exim Out-of-bounds Write Vulnerability KEV EPSS 42% 9.8, critical
  • CVE-2019-10149 Exim Mail Transfer Agent (MTA) Improper Input Validation KEV EPSS 100% 9.8, critical
  • CVE-2018-6789 Exim Buffer Overflow Vulnerability KEV EPSS 82% 9.8, critical
  • CVE-2010-4344 Exim Heap-Based Buffer Overflow Vulnerability KEV EPSS 72% 9.8, critical
  • CVE-2010-4345 Exim Privilege Escalation Vulnerability KEV EPSS 18% 7.8, high

Beyond this page

Is CVE-2026-94056 in your network?

This page tells you how dangerous CVE-2026-94056 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 18 Oct 2026, not the live upstream state.