SARA / Free Tools / CVE / CVE-2021-35247

CVE-2021-35247 — SolarWinds Serv-U Improper Input Validation Vulnerability

Serv-U web login screen to LDAP authentication was allowing characters that were not sufficiently sanitized. SolarWinds has updated the input mechanism to perform additional validation and sanitization. Please Note: No downstream affect has been detected as the LDAP servers ignor

CVSS
4.3 MEDIUM
EPSS
3.19% (top 13.10%)
CWE
CWE-20
Published
2022-01-07T22:39:50.564Z
Last modified
2025-10-21T23:15:49.752Z
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
CISA KEV — Actively Exploited
Added to KEV
2022-01-21
BOD 22-01 due
2022-02-04
Ransomware use
Unknown

01What is this vulnerability?

Serv-U web login screen to LDAP authentication was allowing characters that were not sufficiently sanitized. SolarWinds has updated the input mechanism to perform additional validation and sanitization. Please Note: No downstream affect has been detected as the LDAP servers ignored improper characters. To insure proper input validation is completed in all environments. SolarWinds recommends…

02Affected products

VendorProductVersions
SolarWindsServU — 15.2.5 and previous versions

03Active exploitation status

Yes — actively exploited. Added to the CISA KEV catalog on 2022-01-21. Ransomware use: Unknown.

04Recommended remediation

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

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07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

09References

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