7-Zip >= 9.34 < 26.01 WIM / Ar SYMDEF OOB Read (GHSL-2026-115_GHSL-2026-122)

high Nessus Plugin ID 318790

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Synopsis

The remote host has an application installed that is affected by multiple vulnerabilities.

Description

The version of 7-Zip installed on the remote Windows host is >= 9.34 and prior to 26.01. It is, therefore, affected by multiple vulnerabilities:

- An out-of-bounds read exists in 7-Zip's WIM SecurityId handling, which can lead to a crash when processing a crafted WIM image. (CVE-2026-48103)

- An out-of-bounds read exists in 7-Zip's Ar/BSD SYMDEF parser due to a four-byte OOB read when parsing BSD symbol tables at a buffer boundary, which can lead to a crash when processing a crafted archive.
(CVE-2026-48112)

- A path traversal vulnerability exists in 7-Zip's extraction mode that can lead to arbitrary file write when extracting a crafted archive. (GHSL-2026-115)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade to 7-Zip version 26.01 or later.

Plugin Details

Severity: High

ID: 318790

File Name: 7zip_26_01_CVE-2026-48103.nasl

Version: 1.3

Type: Local

Agent: windows

Family: Windows

Published: 6/5/2026

Updated: 6/9/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.0

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 6.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:C

CVSS Score Source: CVE-2026-48103

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.4

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:7-zip:7-zip

Required KB Items: installed_sw/7-Zip

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/22/2026

Vulnerability Publication Date: 5/22/2026

Reference Information

CVE: CVE-2026-48103, CVE-2026-48112

IAVA: 2026-A-0525

Detections

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