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CVE-2023-40477

7.8
HIGHCVSS v3.1 Base Score
91.89%
HIGH RiskEPSS (100th percentile)

RARLAB WinRAR Recovery Volume Improper Validation of Array Index Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of RARLAB WinRAR. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the processing of recovery volumes. The issue results from the lack of proper validation of user-supplied data, which can result in a memory access past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-21233.

Published: 5/3/2024
Modified: 11/4/2025
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Vulnerability Summary

CVSS v3 Score

7.8HIGH

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

EPSS Score (Exploitation Probability)

91.89%HIGH Exploitation Risk
100th percentile

This vulnerability has a 91.89% probability of being exploited in the next 30 days, ranking higher than 100% of all scored CVEs.

CWE Classification

Related Vulnerabilities

Same Weakness Type(CWE-129)

Similar SeverityHIGH