SimpleHelp Missing Authorization 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: 66% chance of exploitation in the next 30 days (higher than 99% of CVEs)
• Critical severity: CVSS 9.9

[ Description ]Official description

SimpleHelp remote support software v5.5.7 and before has a vulnerability that allows low-privileges technicians to create API keys with excessive permissions. These API keys can be used to escalate privileges to the server admin role.

CISA: SimpleHelp contains a missing authorization vulnerability that could allow low-privileged technicians to create API keys with excessive permissions. These API keys can be used to escalate privileges to the server admin role.

[ 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-01-2025Release Notes
• 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