Is CVE-2021-35247 actively exploited?

Yes. CVE-2021-35247 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2021-35247 be exploited remotely?

The attack vector of CVE-2021-35247 has not been classified yet.

What is the CVSS score of CVE-2021-35247?

CVE-2021-35247 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2021-35247

HIGHCISA KEVIN THE WILD

CVE-2021-35247

Published: January 21, 2022

EPSS:2.92%probability of exploitation in 30 daysPercentile:86.2th

Official Description

SolarWinds Serv-U versions 15.2.5 and earlier contain an improper input validation vulnerability that allows attackers to build and send queries without sanitization.

NVD Source

CISA KEV Advisory

SolarWinds Serv-U Improper Input Validation Vulnerability

SolarWinds Serv-U versions 15.2.5 and earlier contain an improper input validation vulnerability that allows attackers to build and send queries without sanitization.

Added to KEV: 2022-01-21Federal patch deadline: 2022-02-04

Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

SolarWinds Serv-U versions 15.2.5 and earlier contain a high-severity improper input validation vulnerability. This flaw allows attackers to send unsanitized queries, potentially leading to various attacks. Its inclusion in CISA's KEV catalog and an EPSS score of 0.02918 confirm it as a known and actively exploited vulnerability.

This vulnerability is actively being exploited in the wild, as confirmed by CISA's KEV catalog. Attackers can exploit this by crafting and sending queries without proper sanitization.

Recommended Action

Upgrade SolarWinds Serv-U to a version beyond 15.2.5 to address the input validation flaw. Implement robust input sanitization and validation mechanisms on all web applications.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2021-35247 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2021-35247 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.