What is CVE-2021-3154?

CVE-2021-3154 is a high-severity vulnerability in Solarwinds Serv-U, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 7.5/10. Published 2021-05-04.

How severe is CVE-2021-3154?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Solarwinds Serv-U

CVE-2021-3154

An issue was discovered in SolarWinds Serv-U before 15.2.2. Unauthenticated attackers can retrieve cleartext passwords via macro Injection. NOTE: this had a distinct fix relative to CVE-2020-35481.

Published 2021-05-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.012 (67.9th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 67.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Solarwinds Serv-U

Weakness classification (CWE)

CWE-74 — Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection)

References

documentation.solarwinds.com/en/success_center/servu/content/release_notes/serv… (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2021-3154?: CVE-2021-3154 is a high-severity vulnerability in Solarwinds Serv-U, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 7.5/10. Published 2021-05-04.
How severe is CVE-2021-3154?: High severity. CVSS v3 base score is 7.5 out of 10.