What’s Vulnerable › Vulnerabilities

CVE-2020-27657

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-10-29 · updated 2026-06-17
• Weakness: CWE-319

Description

Cleartext transmission of sensitive information vulnerability in DDNS in Synology Router Manager (SRM) before 1.2.4-8081 allows man-in-the-middle attackers to eavesdrop authentication information of DNSExit via unspecified vectors.

Affected products

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

How to fix

Upgrade to a fixed version: Synology Router Manager (SRM) 1.2.4-8081. Check the vendor advisory for mitigations.

References

• https://www.synology.com/security/advisory/Synology_SA_20_14
• https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1071
• https://www.synology.com/security/advisory/Synology_SA_20_14
• https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1071

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