Is CVE-2010-4344 actively exploited?

CVE-2010-4344 has no public evidence of in-the-wild exploitation as of 2025-10-22.

What is the CVSS score for CVE-2010-4344?

CVE-2010-4344 has a CVSS score of 9.8 (CRITICAL severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

How do I patch CVE-2010-4344?

Patch guidance is available from exim security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2010-4344.

Fix CVE-2010-4344 - CRITICAL exim exim

Q: Which products are affected by CVE-2010-4344?

8 products: exim exim, opensuse opensuse, opensuse opensuse, opensuse opensuse, debian debian linux, and 3 more.

Description

Heap-based buffer overflow in the string_vformat function in string.c in Exim before 4.70 allows remote attackers to execute arbitrary code via an SMTP session that includes two MAIL commands in conjunction with a large message containing crafted headers, leading to improper rejection logging.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-787 · Out-of-bounds Write CWE-787 · Out-of-bounds Write

Metadata

Primary Vendor: EXIM
Published: 12/14/2010
Last Modified: 10/22/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

exim : eximopensuse : opensuseopensuse : opensuseopensuse : opensusedebian : debian_linuxcanonical : ubuntu_linuxcanonical : ubuntu_linuxcanonical : ubuntu_linux

Remediation Guidance

Executive Summary

View on NIST NVD