CVE-2023-54337 Sysax Multi Server 6.95 - 'Password' Denial of Service (PoC)

What is CVE-2023-54337?

CVE-2023-54337 is a medium-severity denial of service vulnerability in Sysax Multi Server, published on 13 Jan 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

Sysax Multi Server 6.95 contains a denial of service vulnerability in the administrative password field that allows attackers to crash the application. Attackers can overwrite the password field with 800 bytes of repeated characters to trigger an application crash and disrupt server functionality.

Weakness: CWE-1284

Which versions are affected by CVE-2023-54337?

It affects 1 product.

Products include Sysax Multi Server.

How do I fix CVE-2023-54337?

No fix has been published for CVE-2023-54337 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2023-54337 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-54337 exists.

Other vulnerabilities in Sysax Multi Server

• CVE-2012-10060 Sysax Multi Server < 5.55 SSH Username Buffer Overflow Critical 9.3
• CVE-2009-4790 Path traversal in n/a Critical 9.0
• CVE-2020-13229 Auth bypass in n/a High 8.8
• CVE-2013-10065 Sysax Multi-Server <= 6.10 SSHD Key Exchange DoS High 8.7
• CVE-2024-53458 Denial of service in n/a High 7.5

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-p8c7-9h6j-9wmg.