TeamT5 ThreatSonar Anti-Ransomware Unrestricted Upload of File with Dangerous Type Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2026-02-17

[ Description ]Official description

ThreatSonar Anti-Ransomware from TeamT5 does not properly validate the content of uploaded files. Remote attackers with administrator privileges on the product platform can upload malicious files, which can be used to execute arbitrary system command on the server.

CISA: TeamT5 ThreatSonar Anti-Ransomware contains an unrestricted upload of file with dangerous type vulnerability. ThreatSonar Anti-Ransomware does not properly validate the content of uploaded files. Remote attackers with administrator privileges on the product platform can upload malicious files, which can be used to execute arbitrary system commands on the server.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 10 Mar 2026): Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• www.twcert.org.tw/en/cp-139-8000-e5a5c-2.htmlThird Party Advisory
• www.twcert.org.tw/tw/cp-132-7998-d76dd-1.htmlThird Party Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource