VulnerabilityModified

CVE-2025-53816

Zeroes written outside heap buffer in RAR5 handler may lead to memory corruption and denial of service in versions of 7-Zip prior to 25.0.0.

MEDIUM 5.5EPSS 0.64%

Does this matter?

Lower severity and a low EPSS score (0.64%). Track it; it rarely justifies an emergency change on its own.

Description

7-Zip is a file archiver with a high compression ratio. Zeroes written outside heap buffer in RAR5 handler may lead to memory corruption and denial of service in versions of 7-Zip prior to 25.0.0. Version 25.0.0 contains a fix for the issue.

CVSS 4.0: 5.5 MEDIUMCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS: 0.64% probability · 49th percentile
CISA KEV: Not listed
Weakness: CWE-122
Affected: 7-zip/7-zip
Source: security-advisories@github.com

References

https://securitylab.github.com/advisories/GHSL-2025-058_7-Zip/Exploit, Third Party Advisory
https://www.openwall.com/lists/oss-security/2025/07/18/1Exploit, Mailing List
http://www.openwall.com/lists/oss-security/2025/07/18/1
https://lists.debian.org/debian-lts-announce/2026/05/msg00021.html

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.