What’s Vulnerable › Vulnerabilities

CVE-2012-10060: Sysax Multi Server < 5.55 SSH Username Buffer Overflow

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-08-13 · updated 2026-06-16
• Weakness: CWE-121

Description

Sysax Multi Server versions prior to 5.55 contain a stack-based buffer overflow in its SSH service. When a remote attacker supplies an overly long username during authentication, the server copies the input to a fixed-size stack buffer without proper bounds checking. This allows remote code execution under the context of the service.

Affected products

• Sysax Software Multi-Server: before 5.55 — fixed in 5.55

How to fix

Upgrade to a fixed version: Sysax Software Multi-Server 5.55. Check the vendor advisory for mitigations.

References

• https://advisories.checkpoint.com/defense/advisories/public/2012/cpai-23-sepc.html
• https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ssh/sysax_ssh_username.rb
• https://web.archive.org/web/20120302203344/http://www.pwnag3.com/2012/02/sysax-multi-server-ssh-username-exploit.html
• https://www.exploit-db.com/exploits/18535
• https://www.exploit-db.com/exploits/18557
• https://www.sysax.com/
• https://www.vulncheck.com/advisories/sysax-multi-server-ssh-username-buffer-overflow
• https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ssh/sysax_ssh_username.rb

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