CVE-2026-1842: Softiron Hypercloud

Medium severity, CVSS 6.2. EPSS: 0.2% chance of exploitation in the next 30 days.

HyperCloud versions 2.3.5 through 2.6.8 improperly allowed refresh tokens to be used directly for resource access and failed to invalidate previously issued access tokens when a refresh token was used. Because refresh tokens have a significantly longer lifetime (default one year), an authenticated client could use a refresh token in place of an access token to maintain long-term access without token rotation. Additionally, old access tokens remained valid after refresh, enabling concurrent or extended use beyond intended session boundaries. This vulnerability could allow prolonged unauthorized access if a token is disclosed.

Affected products

• Softiron Hypercloud: from 2.3.5, before 2.6.9 (fixed in 2.6.9)

Published 2026-02-20. Last modified 2026-06-17.