SimpleHelp Path Traversal Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2026-04-24
• Known to be used in ransomware campaigns
• EPSS: 64% chance of exploitation in the next 30 days (higher than 99% of CVEs)

[ Description ]Official description

SimpleHelp remote support software v5.5.7 and before allows admin users to upload arbitrary files anywhere on the file system by uploading a crafted zip file (i.e. zip slip). This can be exploited to execute arbitrary code on the host in the context of the SimpleHelp server user.

CISA: SimpleHelp contains a path traversal vulnerability that allows admin users to upload arbitrary files anywhere on the file system by uploading a crafted zip file (i.e. zip slip). This can be exploited to execute arbitrary code on the host in the context of the SimpleHelp server user.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 8 May 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

• simple-help.com/kb---security-vulnerabilities-01-2025Vendor Advisory
• www.horizon3.ai/attack-research/disclosures/critical-vulnerabilities-in-simplehelp-remo…Third Party Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource
• www.microsoft.com/en-us/security/blog/2026/04/06/storm-1175-focuses-gaze-on-vulnerable-…Technical Description
• www.trendmicro.com/vinfo/us/security/news/ransomware-spotlight/ransomware-spotlight-dra…Third Party Advisory