Check Point Advisories

7-Zip Out of Bounds Read (CVE-2026-48103)

Vulnerability
Protection

Check Point Reference:	CPAI-2026-10342
Date Published:	24 Aug 2026
Severity:	High
Last Updated:	Monday 24 August, 2026
Source:
Industry Reference:	CVE-2026-48103
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	7-Zip 9.34 and later, prior to 26.01
Vulnerability Description	A out of bounds read vulnerability in 7-Zip allows remote attackers to cause a denial of service or minor information disclosure by exploiting an off-by-one heap out-of-bounds read in the WIM archive handler's security descriptor lookup.

Protection Overview

This protection detects attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R81 / R80 / R77 / R75

In the IPS tab, click Protections and find the 7-Zip Out of Bounds Read (CVE-2026-48103) protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Content Protection Violation.
Attack Information: 7-Zip Out of Bounds Read (CVE-2026-48103)