CVE-2020-15261

Veyon vulnerability

CVSS

8.0

EPSS

11.3%

EPSS pct

96th

Exploited

No known

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 vendor

Veyon

Affected product

Veyon

CVSS vector

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

Weakness type (CWE)

CWE-428 — Unquoted Search Path or Element

Published

2020-10-19

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, high attack complexity, requiring high privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 11.3% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 96% of all scored CVEs.

Check your external exposure to CVE-2020-15261

Confirm whether Veyon Veyon is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2020-15261.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2020-15261

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