CVE-2020-27658: Synology Router Manager

Medium severity, CVSS 6.1. EPSS: 1.3% chance of exploitation in the next 30 days.

Synology Router Manager (SRM) before 1.2.4-8081 does not include the HTTPOnly flag in a Set-Cookie header for the session cookie, which makes it easier for remote attackers to obtain potentially sensitive information via script access to this cookie.

Affected products

• Synology Router Manager: from 1.2, before 1.2.4-8081 (fixed in 1.2.4-8081)

Published 2020-10-29. Last modified 2026-06-17.