CVE-2021-38371

7.5 HIGH

Published: August 10, 2021 Modified: November 03, 2025

View on NVD

Description

The STARTTLS feature in Exim through 4.94.2 allows response injection (buffering) during MTA SMTP sending.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

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

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

https://nostarttls.secvuln.info

Source: cve@mitre.org

Tool Signature

https://www.exim.org

Source: cve@mitre.org

Product

https://www.exim.org/static/doc/security/CVE-2021-38371.txt

Source: cve@mitre.org

Broken Link Vendor Advisory

https://lists.debian.org/debian-lts-announce/2024/10/msg00029.html

Source: af854a3a-2127-422b-91ae-364da2661108

https://nostarttls.secvuln.info

Source: af854a3a-2127-422b-91ae-364da2661108

Tool Signature

https://www.exim.org

Source: af854a3a-2127-422b-91ae-364da2661108

Product

https://www.exim.org/static/doc/security/CVE-2021-38371.txt

Source: af854a3a-2127-422b-91ae-364da2661108

Broken Link Vendor Advisory

7 reference(s) from NVD

Quick Stats

CVSS v3 Score

7.5 / 10.0

EPSS (Exploit Probability)

2.9%

86th percentile

Exploitation Status

Not in CISA KEV

Weaknesses (CWE)

CWE-74

Affected Vendors

exim

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