CVE intelligence

CVE-2025-5916

Vulnerability intelligence

Published Jun 9, 2025Sources checked Nov 11, 2026

5.6MEDIUMCVSS out of 10

What this means

Review the available evidence

CVE-2025-5916 and is rated Medium severity with a CVSS score of 5.6. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

Microsoft Security Response Center guidance

Vendor revision: Aug 13, 2026

Vendor remediation details

CBL-Mariner Releases

Vendor-listed releases

3.30.3-8
3.7.7-3
3.6.1-7
3.21.4-20

CISA KEVNot listedBased on the latest collected catalog

EPSS0.2%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2025-5916?

A vulnerability has been identified in the libarchive library. This flaw involves an integer overflow that can be triggered when processing a Web Archive (WARC) file that claims to have more than INT64_MAX - 4 content bytes.

An attacker could craft a malicious WARC archive to induce this overflow, potentially leading to unpredictable program behavior, memory corruption, or a denial-of-service condition within applications that process such archives using libarchive. This bug affects libarchive versions prior to 3.8.0.

Source: NVD