2FA/MFA Bypass Vulnerability in Serv-U 15.4

published 2023-08-10 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-39182

cvss: 7.2; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.1%; EPSS 1.1% chance of exploitation in 30 days, percentile 64%
public exploits: 0; none known

A vulnerability has been identified within Serv-U 15.4 that, if exploited, allows an actor to bypass multi-factor/two-factor authentication. The actor must have administrator-level access to Serv-U to perform this action.

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 2 y ago (2024-10-09)

Exploit prediction

1.06% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.2	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products

SolarWinds Serv-U

Classification

Weakness

CWE-284 Improper Access Control

References

solarwinds.com /trust-center/security-advisories/CVE-2023-35179
broken-link
support.solarwinds.com /SuccessCenter/s/article/Serv-U-15-4-Hotfix-1?language=en_US
release-notes

Sources

CVE List CVE-2023-35179
NVD CVE-2023-35179

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Summary