CVE-2025-53816: 7-zip Heap Overflow — Exploit

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.

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CVSS v3.1 Score

7.5

HIGH

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

Weakness Type (CWE)

CWE-122 CWE-122

Affected Products

Vendor	Product	Versions
7-zip	7-zip	< 25.00

References

Exploits

https://securitylab.github.com/advisories/GHSL-2025-058_7-Zip/ https://www.openwall.com/lists/oss-security/2025/07/18/1

Other References

http://www.openwall.com/lists/oss-security/2025/07/18/1 https://lists.debian.org/debian-lts-announce/2026/05/msg00021.html

Frequently Asked Questions

What is CVE-2025-53816? +

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. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-53816? +

CVE-2025-53816 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-53816? +

CVE-2025-53816 affects products from 7-zip, specifically: 7-zip. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-53816? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2025-53816