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CVE-2026-13121— Parallels RAS Client RDP Backend Service Exposed Dangerous Function Local Privilege Escalation Vulnerability

Quick assessment

Affected
Parallels RAS Client
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Parallels RAS Client是美国Parallels公司的一个远程访问客户端。 Parallels RAS Client 21.0.26296版本存在权限许可和访问控制问题漏洞，该漏洞源于RAS RDP Backend Service暴露危险函数，可能导致本地攻击者提升权限并以SYSTEM身份执行任意代码。

AI Predicted 7.8 Difficulty: Easy EPSS 0.17% · P6

Affected Version Matrix 1

VendorProduct Version RangeStatus
Parallels RAS Client 21.0.26296 affected
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I. Basic Information for CVE-2026-13121

Vulnerability Information
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Vulnerability Title
Parallels RAS Client RDP Backend Service Exposed Dangerous Function Local Privilege Escalation Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Parallels RAS Client RDP Backend Service Exposed Dangerous Function Local Privilege Escalation Vulnerability. This vulnerability allows local attackers to escalate privileges on affected installations of Parallels RAS Client. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the RAS RDP Backend Service. The issue results from an exposed dangerous function. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-29220.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
暴露危险的方法或函数
Source: CVE Program / CVE List V5
Vulnerability Title
Parallels RAS Client 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Parallels RAS Client是美国Parallels公司的一个远程访问客户端。 Parallels RAS Client 21.0.26296版本存在权限许可和访问控制问题漏洞，该漏洞源于RAS RDP Backend Service暴露危险函数，可能导致本地攻击者提升权限并以SYSTEM身份执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Parallels RAS Client 21.0.26296 -

II. Public POCs for CVE-2026-13121

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III. Intelligence Information for CVE-2026-13121

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Vendor Advisories for CVE-2026-13121 (1)

Same Patch Batch · Parallels · 2026-08-20 · 3 CVEs total

CVE-2026-18263 Parallels RAS Client RDP Backend Service Exposed Dangerous Function Local Privilege Escala
CVE-2026-18262 Parallels RAS Client RDP Backend Service Exposed Dangerous Function Local Privilege Escala

IV. Related Vulnerabilities

Same product: RAS Client
Same vendor: Parallels
Same weakness: CWE-749

V. Comments for CVE-2026-13121

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