CVE-2025-53817: 7-zip Null Dereference — Exploit

Description

7-Zip is a file archiver with a high compression ratio. 7-Zip supports extracting from Compound Documents. Prior to version 25.0.0, a null pointer dereference in the Compound handler may lead to denial of service. Version 25.0.0 contains a fix cor 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-476 CWE-476

Affected Products

Vendor	Product	Versions
7-zip	7-zip	< 25.00

References

Exploits

https://securitylab.github.com/advisories/GHSL-2025-059_7-Zip/ https://www.openwall.com/lists/oss-security/2025/07/18/2

Other References

http://www.openwall.com/lists/oss-security/2025/07/18/2

Frequently Asked Questions

What is CVE-2025-53817? +

7-Zip is a file archiver with a high compression ratio. 7-Zip supports extracting from Compound Documents. Prior to version 25.0.0, a null pointer dereference in the Compound handler may lead to denial of service. Version 25.0.0 contains a fix cor the issue. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-53817? +

CVE-2025-53817 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-2025-53817? +

CVE-2025-53817 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-2025-53817? +

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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