CVE-2026-40687

Published Apr 30, 2026

Last updated 3 days ago

Overview

Description
In Exim before 4.99.2, when the SPA authentication driver is used with an adversarial SPA resource, there can be an out-of-bounds write that crashes the connection instance, or erroneous data processing that divulges data from uninitialized heap memory.
Source
cve@mitre.org
NVD status
Analyzed
Products
exim

Risk scores

CVSS 3.1

Type
Primary
Base score
9.1
Impact score
5.2
Exploitability score
3.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Severity
CRITICAL

Weaknesses

cve@mitre.org
CWE-909

Social media

Hype score
Not currently trending

Configurations