TI-2026-11148 Aliases CVE-2026-13121 GHSA-q7c4-rqx8-mr8v

Parallels RAS Client RDP Backend Service Exposed Dangerous Function Local Privilege…

LOW 35CWE-749Published 2026-08-20 · Updated 2026-08-21

Key facts

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

Attack profile from CVSS 3.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00171 6th 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

Vendor	Product	Affected versions	Fixed in	Status	Source
Parallels	RAS Client	21.0.26296	—	No fix listed	CNA

RAS Client VendorParallels Affected 21.0.26296 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-13121
2026-10-03 Alias added: GHSA-q7c4-rqx8-mr8v

References

Other 1

ZDI-26-554

TI-2025-22549 Path traversal in Parallels Desktop for Mac CVSS 3.1HIGH 8.8
TI-2022-19453 The Web Client of Parallels Remote Application Server v18.0 is vulnerable to Host Header… CVSS 3.1HIGH 8.1
TI-2024-36288 Link following in Parallels Desktop for Mac CVSS 3.1HIGH 7.8
TI-2024-35227 Link following in Parallels Desktop for Mac CVSS 3.1HIGH 7.8
TI-2024-24264 Link following in Parallels Desktop for Mac CVSS 3.1HIGH 7.8
TI-2013-04282 The default configuration of Parallels Plesk Panel 9.0.x and 9.2.x on UNIX, and Small… CVSS 2.0HIGH 7.5

See all 158 →

Sources

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