Vulnerability details
CVE-2026-18263
Parallels RAS Client
Parallels RAS Client RDP Backend Service Exposed Dangerous Function Local Privilege Escalation Vulnerability
CVSS 3.0
7.8High
Official 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-28886.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.8High | 3.0 | CVEProject cvelistV5 (CNA) (zdi) | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Parallels | RAS Client | 21.0.26296 | CVEProject cvelistV5 (CNA) |
References and advisories
1- https://www.zerodayinitiative.com/advisories/ZDI-26-556/ x_research-advisory
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Details
- Published
- 2026-08-20
- Last updated
- 2026-08-26
- State
- Published
- Assigner (CNA)
- zdi
Exploit prediction (EPSS)
0.17%
Probability of exploitation in 30 days
6.5%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-749Exposed Dangerous Method or Function