Read the docs
TI-2023-21293 Aliases CVE-2023-40477GHSA-58vr-f4x9-3h36

Improper array index validation in RARLAB WinRAR

Priority MEDIUM 49CWE-129Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.0 · CNA. Fix status from CNA. Impact type from CWE-129 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.1138 96th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
RARLABWinRAR6.21—No fix listedCNA
  • WinRAR VendorRARLAB Affected 6.21 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:rarlab:winrar:*:*:*:*:*:*:*:*before 6.23VulnerableRARLAB
  • cpe:2.3:a:rarlab:winrar:*:*:*:*:*:*:*:* Versions before 6.23 Vulnerable ·RARLAB

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-40477
  2. 2026-10-03 Alias added: GHSA-58vr-f4x9-3h36

References

Advisory 2

  • TI-2025-07400 Path traversal vulnerability in WinRAR KEVCVSS 4.0HIGH 8.4
  • TI-2025-05626 Path traversal in RARLAB WinRAR KEVCVSS 3.0HIGH 7.8
  • TI-2023-20115 RARLAB WinRAR before 6.23 allows attackers to execute arbitrary code when a user attempts… KEVCVSS 3.1HIGH 7.8
  • TI-2018-14356 Path traversal in Check Point Software Technologies Ltd. WinRAR KEVCVSS 3.1HIGH 7.8
  • TI-2024-23905 RARLAB WinRAR before 7.00, on Windows, allows attackers to spoof the screen output via… CVSS 3.1HIGH 7.5
  • TI-2024-22371 RARLAB WinRAR before 7.00, on Linux and UNIX platforms, allows attackers to spoof the… CVSS 3.1HIGH 7.1
See all 27 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences