CVE-2023-35179Network attack vector

Administrator-level MFA bypass

Published Aug 10, 2023 · Updated Oct 9, 2024

Improper access control in SolarWinds Serv-U 15.4 allows remote authenticated users with administrator access to bypass MFA or 2FA. SolarWinds has not published the affected component or the operation that incorrectly handles authentication state. Exploitation requires Serv-U administrator-level access and defeats the configured second-factor authentication control.

CVSS severity7.2
High
EPSS probability1.06%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in SolarWinds Serv-U 15.4 allows remote authenticated users with administrator access to bypass MFA or 2FA. SolarWinds has not published the affected component or the operation that incorrectly handles authentication state. Exploitation requires Serv-U administrator-level access and defeats the configured second-factor authentication control.

The record

CVE
CVE-2023-35179
Published
Aug 10, 2023
Updated
Oct 9, 2024
Vendor
SolarWinds
Product
Serv-U
Classifications
CWE-284, CAPEC-180, T1556.006
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 10, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 9, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=15.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

SolarWinds · Serv-Uversion=15.4

Published CVSS scores

7.2SolarWindsCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
CAPEC-180Exploiting Incorrectly Configured Access Control Security Levels
T1556.006Modify Authentication Process: Multi-Factor Authentication

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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