PT-2021-17040 · Synology · Synology Diskstation Manager

Claudio Bozzato + 1 · Published 2021-02-26 · Updated 2025-01-14 · CVE-2021-26562

Positive Technologies (AI Summary)

CVSS v3.1

9.0

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Synology DiskStation Manager (DSM) versions prior to 6.2.3-25426-3

Description The issue is an out-of-bounds write vulnerability in the synoagentregisterd component. This allows man-in-the-middle attackers to execute arbitrary code via the syno finder site HTTP header.

Recommendations For versions prior to 6.2.3-25426-3, update to version 6.2.3-25426-3 or later to resolve the issue. As a temporary workaround, consider restricting access to the syno finder site HTTP header to minimize the risk of exploitation.

Exploit

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2021-26562

Affected Products

Synology Diskstation Manager

References · 5

• 🔥 https://talosintelligence.com/vulnerability_reports/TALOS-2020-1159 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-26562 · Security Note
• https://osv.dev/vulnerability/CVE-2021-26562 · Vendor Advisory
• https://synology.com/security/advisory/Synology_SA_20_26 · Vendor Advisory
• https://t.me/cibsecurity/24254 · Telegram Post