VULNERABILITY INTELLIGENCE

CVE-2021-26561

CVSS score9 CRITICAL

EPSS probability2.06%

CISA KEVNot currently listed

Published2021-02-26

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Description

Stack-based buffer overflow vulnerability in synoagentregisterd in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows man-in-the-middle attackers to execute arbitrary code via syno_finder_site HTTP header.

Weakness classification

security@synology.com: CWE-121
nvd@nist.gov: CWE-119

Primary references

security@synology.com — Vendor Advisory
security@synology.com — Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory