Vulnerability details
CVE-2023-38831
Actively exploited
RARLAB WinRAR
CVSS 3.1
7.8High
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.8High | 3.1 | CISA ADP / Vulnrichment (CISA-ADP) | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| RARLAB | WinRAR | v < 6.23 | CISA ADP / Vulnrichment |
References and advisories
6- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-38831 government-resource
- https://www.group-ib.com/blog/cve-2023-38831-winrar-zero-day/
- https://www.bleepingcomputer.com/news/security/winrar-zero-day-exploited-since-april-to-hack-trading-accounts/
- https://news.ycombinator.com/item?id=37236100
- http://packetstormsecurity.com/files/174573/WinRAR-Remote-Code-Execution.html
- https://blog.google/threat-analysis-group/government-backed-actors-exploiting-winrar-vulnerability/
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Details
- Published
- 2023-08-23
- Last updated
- 2026-08-05
- State
- Published
- Assigner (CNA)
- mitre
- Kolun priority
- 87 · Critical
CISA KEV catalog
- Date added
- 2023-08-24
- Due date
- 2023-09-14
- Used in ransomware
- Yes
Exploit prediction (EPSS)
99.81%
Probability of exploitation in 30 days
99.9%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- Active
- Technical impact
- Total
Weaknesses (CWE)
- CWE-351Insufficient Type Distinction