CVE WatchAug 5, 2026

CVE-2023-38831

RARLAB WinRAR Code Execution Vulnerability

CVSS

7.8

High

EPSS

99.8%

p100

KEV

YES

Aug 24, 2023

Exploit Today

0-100

Published: Aug 23, 2023 · Last modified: Aug 5, 2026 · CWE-345 · CWE-351

EPSS · 30d

98.0%EPSS · 30 days99.8%

2026-09-162026-10-14

KEV catalog record

Product

RARLAB / WinRAR

Vulnerability

RARLAB WinRAR Code Execution Vulnerability

Added to KEV

Aug 24, 2023

Remediate by

Sep 14, 2023

Known ransomware use

Yes

Summary description

RARLAB WinRAR contains an unspecified vulnerability that allows an attacker to execute code when a user attempts to view a benign file within a ZIP archive.

Required action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Notes

http://www.win-rar.com/singlenewsview.html?&L=0&tx_ttnews%5Btt_news%5D=232&cHash=c5bf79590657e32554c6683296a8e8aa; https://nvd.nist.gov/vuln/detail/CVE-2023-38831

Technical description

RARLAB WinRAR before 6.23 allows attackers to execute arbitrary code when a user attempts to view a benign file within a ZIP archive. The issue occurs because a ZIP archive may include a benign file (such as an ordinary .JPG file) and also a folder that has the same name as the benign file, and the contents of the folder (which may include executable content) are processed during an attempt to access only the benign file. This was exploited in the wild in April through October 2023.

Official references

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