CVE-2018-20250

Summary

CVE	CVE-2018-20250
State	PUBLISHED
Assigner	checkpoint
Source Priority	CVE Program / NVD first with legacy fallback
Published	2019-02-05 20:29:00 UTC
Updated	2026-08-13 05:17:17 UTC
Description	In WinRAR versions prior to and including 5.61, There is path traversal vulnerability when crafting the filename field of the ACE format (in UNACEV2.dll). When the filename field is manipulated with specific patterns, the destination (extraction) folder is ignored, thus treating the filename as an absolute path.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS: 0.962740000 probability, percentile 0.998740000 (date 2026-08-27)

CISA KEV: Listed on 2022-02-15; due 2022-08-15; ransomware use Known

Problem Types: CWE-36 | CWE-22 | CWE-36 CWE-36: Absolute Path Traversal

Version	Source	Type	Score	Severity	Vector
3.1	[email protected]	Primary	7.8	HIGH	`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`
3.1	ADP	DECLARED	7.8	HIGH	`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`
3.1	134c704f-9b21-4f2e-91b3-4a467353bcc0	Secondary	7.8	HIGH	`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`
2.0	[email protected]	Primary	6.8		`AV:N/AC:M/Au:N/C:P/I:P/A:P`

CVSS v3.1 Breakdown

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v2.0 Breakdown

Access Vector

Network

Access Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

AV:N/AC:M/Au:N/C:P/I:P/A:P

CISA Known Exploited Vulnerability

Vendor	RARLAB
Product	WinRAR
Name	WinRAR Absolute Path Traversal Vulnerability
Required Action	Apply updates per vendor instructions.
Notes	https://nvd.nist.gov/vuln/detail/CVE-2018-20250

NVD Known Affected Configurations (CPE 2.3)

Type	Vendor	Product	Version	Update	Edition	Language
Application	Rarlab	Winrar	All	All	All	All

Vendor Declared Affected Products

Source	Vendor	Product	Version	Platforms
CNA	Check Point Software Technologies Ltd.	WinRAR	affected All versions prior and including 5.61	Not specified

References

Reference	Source	Link	Tags
www.cisa.gov/known-exploited-vulnerabilities-catalog	134c704f-9b21-4f2e-91b3-4a467353bcc0	www.cisa.gov	US Government Resource
WinRAR download and support: Whats New	af854a3a-2127-422b-91ae-364da2661108	www.win-rar.com	Release Notes
WinRAR 5.61 - Path Traversal	af854a3a-2127-422b-91ae-364da2661108	www.exploit-db.com	Exploit, Third Party Advisory, VDB Entry
RARLAB WinRAR ACE Format Input Validation Remote Code Execution ≈ Packet Storm	af854a3a-2127-422b-91ae-364da2661108	packetstormsecurity.com	Exploit, Third Party Advisory, VDB Entry
RARLAB WinRAR ACE Format Input Validation Remote Code Execution	af854a3a-2127-422b-91ae-364da2661108	www.rapid7.com	Third Party Advisory
WinRAR Multiple Security Vulnerabilities	af854a3a-2127-422b-91ae-364da2661108	www.securityfocus.com	Broken Link, Third Party Advisory, VDB Entry
Extracting a 19 Year Old Code Execution from WinRAR - Check Point Research	af854a3a-2127-422b-91ae-364da2661108	research.checkpoint.com	Exploit, Press/Media Coverage, Third Party Advisory
GitHub - blau72/CVE-2018-20250-WinRAR-ACE: Proof of concept code in C# to exploit the WinRAR ACE file extraction path (CVE-2018-20250).	af854a3a-2127-422b-91ae-364da2661108	github.com	Exploit, Third Party Advisory
RARLAB WinRAR 5.61 - ACE Format Input Validation Remote Code Execution (Metasploit) - Windows local Exploit	af854a3a-2127-422b-91ae-364da2661108	www.exploit-db.com	Exploit, Third Party Advisory, VDB Entry
CVE Program record	CVE.ORG	www.cve.org	canonical
NVD vulnerability detail	NVD	nvd.nist.gov	canonical, analysis
CISA Known Exploited Vulnerabilities catalog	CISA	www.cisa.gov	kev

No vendor comments have been submitted for this CVE.

Additional Advisory Data

Source	Time	Event
ADP	2022-02-15T00:00:00.000Z	CVE-2018-20250 added to CISA KEV

There are currently no legacy QID mappings associated with this CVE.