Vulnerability Report

CVE-2021-35247

CISA KEV Active

Title: Solarwinds Serv-U Improper Input Validation

Improper Input Validation

Proof Of Concept

No public PoC currently indexed for CVE-2021-35247.

CWE Category CWE-20
Published Date Jan 10, 2022
Modified Date Oct 27, 2025
Exploit Status Not Found
Score 4.3 CVSS v3.1
Exploit Probability (EPSS)
5.34%

Vulnerability Summary

CVE-2021-35247: 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 scheduling an update to the latest version of Serv-U.

Impacted Vendors

S
solarwinds 1
C
cat_soft 1
R
rhinosoft 1

Reference Links

https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-3_release_notes.htm https://www.solarwinds.com/trust-center/security-advisories/cve-2021-35247 https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-3_release_notes.htm https://www.solarwinds.com/trust-center/security-advisories/cve-2021-35247 https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-35247
CVSS v3.1
Source Entity [email protected]
Severity MEDIUM
4.3
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
REQUIRED
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
CVSS v3.1
Source Entity [email protected]
Severity MEDIUM
5.3
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS v2.0
Source Entity [email protected]
Severity MEDIUM
5.0
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:L/Au:N/C:N/I:P/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2021-35247 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction REQUIRED
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Affected Stack

No specific products linked.