Synology Skynas Firmware — known CVE vulnerabilities

Every CVE whose affected-product data names Synology Skynas Firmware, ordered by CVSS severity, with EPSS exploit prediction and CISA KEV status.

CVEs (13)

• CVE-2021-26560 — CVSS 9.0 (critical): Cleartext transmission of sensitive information vulnerability in synoagentregisterd in Synology DiskStation Manager (DSM) before…
• CVE-2021-26561 — CVSS 9.0 (critical): Stack-based buffer overflow vulnerability in synoagentregisterd in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows…
• CVE-2021-26562 — CVSS 9.0 (critical): Out-of-bounds write vulnerability in synoagentregisterd in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows man-in-the-middle…
• CVE-2020-27652 — CVSS 8.3 (high): Algorithm downgrade vulnerability in QuickConnect in Synology DiskStation Manager (DSM) before 6.2.3-25426-2 allows man-in-the-middle…
• CVE-2021-26564 — CVSS 8.3 (high): Cleartext transmission of sensitive information vulnerability in synorelayd in Synology DiskStation Manager (DSM) before 6.2.3-25426-3…
• CVE-2020-27648 — CVSS 8.3 (high): Improper certificate validation vulnerability in OpenVPN client in Synology DiskStation Manager (DSM) before 6.2.3-25426-2 allows…
• CVE-2021-26566 — CVSS 8.3 (high): Insertion of sensitive information into sent data vulnerability in synorelayd in Synology DiskStation Manager (DSM) before 6.2.3-25426-3…
• CVE-2021-26565 — CVSS 8.3 (high): Cleartext transmission of sensitive information vulnerability in synorelayd in Synology DiskStation Manager (DSM) before 6.2.3-25426-3…
• CVE-2021-26563 — CVSS 8.2 (high): Incorrect authorization vulnerability in synoagentregisterd in Synology DiskStation Manager (DSM) before 6.2.4-25553 allows local users to…
• CVE-2021-3156 — CVSS 7.8 (high) — actively exploited: Sudo before 1.9.5p2 contains an off-by-one error that can result in a heap-based buffer overflow, which allows privilege escalation to root…
• CVE-2021-26567 — CVSS 7.8 (high): Stack-based buffer overflow vulnerability in frontend/main.c in faad2 before 2.2.7.1 allow local attackers to execute arbitrary code via…
• CVE-2019-3870 — CVSS 6.1 (medium): A vulnerability was found in Samba from version (including) 4.9 to versions before 4.9.6 and 4.10.2. During the creation of a new Samba AD…
• CVE-2020-27650 — CVSS 5.8 (medium): Synology DiskStation Manager (DSM) before 6.2.3-25426-2 does not set the Secure flag for the session cookie in an HTTPS session, which…