CVE-2021-35247

criticalknown exploitedcovered by 1 sourcefirst seen 2022-01-21

Actively exploited. CVE-2021-35247 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-01-21) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.

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.

CSIRTS triage

vendor: SolarWinds product: Serv-UOtheraffected: 15.2.5 and earlier

What: Serv-U contains an improper input validation vulnerability that allows attackers to build and send queries without sanitization.
Who is affected: Deployments of SolarWinds Serv-U versions 15.2.5 and earlier.
Urgency: Remediation is urgent due to active exploitation and critical severity.
Action: Update to a patched version of SolarWinds Serv-U.

AI-assisted analysis generated from the source advisory — verify against the original.

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Exploitation outlook

Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 87% of all EPSS-scored CVEs.

Advisory coverage (1)

criticalexploitedCVE-2021-35247: SolarWinds Serv-U Improper Input Validation Vulnerabilitycisa-kev · 2022-01-21

External references

NVD record for CVE-2021-35247

CVE.org record

CISA KEV catalog

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