What is CVE-2020-15542?

CVE-2020-15542 is a critical-severity vulnerability in Solarwinds Serv-U FTP Server. CVSS score: 9.8/10. Published 2020-07-05.

How severe is CVE-2020-15542?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Solarwinds Serv-U FTP Server

CVE-2020-15542

SolarWinds Serv-U FTP server before 15.2.1 mishandles the CHMOD command.

Published 2020-07-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.016 (75.3th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 75.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

Solarwinds Serv-U FTP Server

References

documentation.solarwinds.com/en/success_center/servu/Content/Release_Notes/Serv… (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2020-15542?: CVE-2020-15542 is a critical-severity vulnerability in Solarwinds Serv-U FTP Server. CVSS score: 9.8/10. Published 2020-07-05.
How severe is CVE-2020-15542?: Critical severity. CVSS v3 base score is 9.8 out of 10.