CVE-2020-15261

Name: CVE-2020-15261
Creator: NVD / NIST
Published: 2020-10-19T22:15:13.093+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.7/10EPSS 11.12%

Last modified Jun 17, 2026

CVE-2020-15261 is a medium-severity vulnerability rated 6.7/10 on the CVSS scale. 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. EPSS estimates a 11.12% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.7/10

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

11.12%

95.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-428

Affected Software

Vendor	Product	Versions
Veyon	Veyon	< 4.4.2

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

Timeline

Published: Oct 19, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-15261?

How severe is CVE-2020-15261?

CVE-2020-15261 has a CVSS score of 6.7/10 (MEDIUM severity). The EPSS model estimates a 11.12% probability of exploitation in the next 30 days.

How do I fix CVE-2020-15261?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-15261?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST