What’s Vulnerable › Vulnerabilities

CVE-2020-13872

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-06-09 · updated 2026-06-17
• Weakness: CWE-307

Description

Royal TS before 5 has a 0.0.0.0 listener, which makes it easier for attackers to bypass tunnel authentication via a brute-force approach.

Affected products

• Royalapps Royal Ts: before 5.0 — fixed in 5.0

How to fix

Upgrade to a fixed version: Royalapps Royal Ts 5.0. Check the vendor advisory for mitigations.

References

• http://packetstormsecurity.com/files/158000/RoyalTS-SSH-Tunnel-Authentication-Bypass.html
• http://seclists.org/fulldisclosure/2020/Jun/14
• https://hacktips.it/royalts-ssh-tunnel-authentication-bypass/
• http://packetstormsecurity.com/files/158000/RoyalTS-SSH-Tunnel-Authentication-Bypass.html
• http://seclists.org/fulldisclosure/2020/Jun/14
• https://hacktips.it/royalts-ssh-tunnel-authentication-bypass/

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