Missing Initialization of Resource Affecting exim/exim package, versions [,4.99.2)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-EXIMEXIM-16325119
- published1 May 2026
- disclosed30 Apr 2026
- creditUnknown
Introduced: 30 Apr 2026
CVE-2026-40687 (opens in a new tab)How to fix?
Upgrade exim/exim to version 4.99.2 or higher.
Overview
Affected versions of this package are vulnerable to Missing Initialization of Resource in the SPA authentication driver process when interacting with a malicious SPA resource. An attacker can cause a crash of the connection instance or access data from uninitialized heap memory by supplying specially crafted input.