RARLAB flaws being used in attacks

CISA lists 5 flaws in RARLAB products as being used in attacks, most recently on 9 Dec 2025. 4 have been used in ransomware.

What to do

1. Update every RARLAB product you use.Install the updates RARLAB offers, on every device, and restart when asked. Each flaw below has a fix or clear advice; that’s one of CISA’s conditions for listing it.
2. If someone looks after IT for you, send them this page.Many of these are in equipment you don’t see: routers, firewalls, servers, the office network. Ask them to confirm each one is fixed, or that you don’t use the product.
3. Check anything else in the lookup.Search any app, company or CVE. Not being on CISA’s list doesn’t mean safe: keep updating either way.

Every flaw, newest first

1. Being used in attacksAdded by CISA on 9 Dec 2025
   RARLAB WinRAR
   CVE-2025-6218RARLAB WinRAR Path Traversal Vulnerability
   RARLAB WinRAR contains a path traversal vulnerability allowing an attacker to execute code in the context of the current user.
   CISA’s required actionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
   CVE recordNVD
2. Being used in attacksUsed in ransomwareAdded by CISA on 12 Aug 2025
   RARLAB WinRAR
   CVE-2025-8088RARLAB WinRAR Path Traversal Vulnerability
   RARLAB WinRAR contains a path traversal vulnerability affecting the Windows version of WinRAR. This vulnerability could allow an attacker to execute arbitrary code by crafting malicious archive files.
   CISA’s required actionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
   CVE recordNVD
3. Being used in attacksUsed in ransomwareAdded by CISA on 24 Aug 2023
   RARLAB WinRAR
   CVE-2023-38831RARLAB WinRAR Code Execution Vulnerability
   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.
   CISA’s required actionApply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
   CVE recordNVD
4. Being used in attacksUsed in ransomwareAdded by CISA on 9 Aug 2022
   RARLAB UnRAR
   CVE-2022-30333RARLAB UnRAR Directory Traversal Vulnerability
   RARLAB UnRAR on Linux and UNIX contains a directory traversal vulnerability, allowing an attacker to write to files during an extract (unpack) operation.
   CISA’s required actionApply updates per vendor instructions.
   CVE recordNVD
5. Being used in attacksUsed in ransomwareAdded by CISA on 15 Feb 2022
   RARLAB WinRAR
   CVE-2018-20250WinRAR Absolute Path Traversal Vulnerability
   WinRAR Absolute Path Traversal vulnerability leads to Remote Code Execution
   CISA’s required actionApply updates per vendor instructions.
   CVE recordNVD

From CISA’s Known Exploited Vulnerabilities catalog, updated 21 Oct 2026 (version 2026.10.21). CISA’s required actions are written for US government agencies. RARLAB on CISA’s site.