Sysax: >> Multi Server Security Vulnerabilities
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.
CVSS Score
9.1
EPSS Score
0.0
Published
2026-01-13
Sysax Multi Server versions prior to 5.55 contains 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.
CVSS Score
9.8
EPSS Score
0.691
Published
2025-08-13
A denial-of-service vulnerability exists in Sysax Multi-Server version 6.10 via its SSH daemon. A specially crafted SSH key exchange packet can trigger a crash in the service, resulting in loss of availability. The flaw is triggered during the handling of malformed key exchange data, including a non-standard byte (\x28) in place of the expected SSH protocol delimiter.
CVSS Score
7.5
EPSS Score
0.489
Published
2025-08-05
Sysax Multi Server 6.99 is vulnerable to a denial of service (DoS) condition when processing specially crafted SSH packets.
CVSS Score
7.5
EPSS Score
0.002
Published
2025-03-05
Sysax Multi Server 6.99 is vulnerable to Cross Site Scripting (XSS) via the /scgi?sid parameter.
CVSS Score
5.4
EPSS Score
0.001
Published
2024-12-02
When uploading a file in Sysax Multi Server 6.90, an authenticated user can modify the filename="" parameter in the uploadfile_name1.htm form to a length of 368 or more bytes. This will create a buffer overflow condition, causing the application to crash.
CVSS Score
6.5
EPSS Score
0.009
Published
2020-08-19
An issue was discovered in Sysax Multi Server 6.90. An attacker can determine the username (under which the web server is running) by triggering an invalid path permission error. This bypasses the fakepath protection mechanism.
CVSS Score
5.3
EPSS Score
0.005
Published
2020-06-02
An issue was discovered in Sysax Multi Server 6.90. There is reflected XSS via the /scgi sid parameter.
CVSS Score
6.1
EPSS Score
0.091
Published
2020-06-02
An issue was discovered in Sysax Multi Server 6.90. A session can be hijacked if one observes the sid value in any /scgi URI, because it is an authentication token.
CVSS Score
8.8
EPSS Score
0.003
Published
2020-06-02
Stack-based buffer overflow in Sysax Multi Server before 5.52, when HTTP is enabled, allows remote authenticated users with the create folder permission to execute arbitrary code via a crafted request.
CVSS Score
7.1
EPSS Score
0.638
Published
2013-01-31
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