CVE-2020-15261
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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 11.3%, higher than 96% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 3.1
- 6.7 MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 11.25% probability · 96th percentile
- Public exploits
- 1 in Exploit-DB · first 1 June 2021
- CISA KEV
- Not listed
- Weakness
- CWE-428
- Affected
- veyon/veyon
- Source
- security-advisories@github.com
EPSS 11.3% since 3 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://packetstormsecurity.com/files/162873/Veyon-4.4.1-Unquoted-Service-Path.htmlExploit, Third Party Advisory, VDB Entry
- https://github.com/veyon/veyon/commit/f231ec511b9a09f43f49b2c7bb7c60b8046276b1Patch, Third Party Advisory
- https://github.com/veyon/veyon/issues/657Issue Tracking, Third Party Advisory
- https://github.com/veyon/veyon/security/advisories/GHSA-c8cc-x786-hqqpThird Party Advisory
- https://www.exploit-db.com/exploits/48246Exploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/49925Exploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/162873/Veyon-4.4.1-Unquoted-Service-Path.htmlExploit, Third Party Advisory, VDB Entry
- https://github.com/veyon/veyon/commit/f231ec511b9a09f43f49b2c7bb7c60b8046276b1Patch, Third Party Advisory
- https://github.com/veyon/veyon/issues/657Issue Tracking, Third Party Advisory
- https://github.com/veyon/veyon/security/advisories/GHSA-c8cc-x786-hqqpThird Party Advisory
- https://www.exploit-db.com/exploits/48246Exploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/49925Exploit, Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.