What’s Vulnerable › Vulnerabilities

CVE-2020-15261: Unquoted service path vulnerability on Veyon

• Severity: medium (CVSS 6.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 11.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-10-19 · updated 2026-06-17
• Weakness: CWE-428

Description

On Windows the Veyon Service before version 4.4.2 contains an unquoted service path vulnerability, allowing locally authenticated users with administrative privileges to run malicious executables with LocalSystem privileges. Since Veyon users (both students and teachers) usually don't have administrative privileges, this vulnerability is only dangerous in anyway unsafe setups. The problem has been fixed in version 4.4.2. As a workaround, the exploitation of the vulnerability can be prevented by revoking administrative privileges from all potentially untrustworthy users.

Affected products

• veyon: before 4.4.2 — fixed in 4.4.2

How to fix

Upgrade to a fixed version: veyon 4.4.2. Check the vendor advisory for mitigations.

References

• http://packetstormsecurity.com/files/162873/Veyon-4.4.1-Unquoted-Service-Path.html
• https://github.com/veyon/veyon/commit/f231ec511b9a09f43f49b2c7bb7c60b8046276b1
• https://github.com/veyon/veyon/issues/657
• https://github.com/veyon/veyon/security/advisories/GHSA-c8cc-x786-hqqp
• https://www.exploit-db.com/exploits/48246
• https://www.exploit-db.com/exploits/49925
• http://packetstormsecurity.com/files/162873/Veyon-4.4.1-Unquoted-Service-Path.html
• https://github.com/veyon/veyon/commit/f231ec511b9a09f43f49b2c7bb7c60b8046276b1
• https://github.com/veyon/veyon/issues/657
• https://github.com/veyon/veyon/security/advisories/GHSA-c8cc-x786-hqqp
• https://www.exploit-db.com/exploits/48246
• https://www.exploit-db.com/exploits/49925

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