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Vulnerability record · CVE-2013-10065 · published 5 August 2025

CVE-2013-10065: Sysax multi server vulnerability

Sysax · Multi Server

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.

8.7 CVSS 4.0 High EPSS 1.6% · top 24.7% CWE-248 · CWE-248
8.7CVSS 4.0 base score
1.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 4 tagged exploit
16 Jun 2026Last modified by NVD

Description

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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/auxiliary/dos/windows/ssh/sysax_sshd_kexcha Exploit
https://www.mattandreko.com/2013/04/08/sysax-multi-server-6.10-ssh-dos/ ExploitThird Party Advisory
https://www.sysax.com/ Product
https://www.vulncheck.com/advisories/sysax-multi-server-sshd-key-exchange-dos Third Party Advisory
https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/auxiliary/dos/windows/ssh/sysax_sshd_kexcha Exploit
https://www.mattandreko.com/2013/04/08/sysax-multi-server-6.10-ssh-dos/ ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.3CVE-2012-10060Sysax multi server stack-based buffer overflow vulnerabilitySysax 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 us…EPSS 3.0%9.0CVE-2009-4790Sysax multi server path traversal vulnerabilityMultiple directory traversal vulnerabilities in Sysax Multi Server 4.5 allow remote authenticated users to read or modify arbitrary files via crafted…EPSS 3.9%8.8CVE-2020-13229Sysax multi server vulnerabilityAn 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 authen…EPSS 1.6%7.5CVE-2024-53458Sysax multi server uncontrolled resource consumption vulnerabilitySysax Multi Server 6.99 is vulnerable to a denial of service (DoS) condition when processing specially crafted SSH packets.EPSS 0.52%7.1CVE-2012-6530Sysax Multi Server HTTP stack buffer overflow enables remote code executionSysax Multi Server before 5.52 contains a stack-based buffer overflow that is reachable when HTTP is enabled. A remote authenticated user holding the…EPSS 46%analysed6.5CVE-2020-23574Sysax multi server memory buffer overflow vulnerabilityWhen 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 le…EPSS 0.95%6.1CVE-2020-13228Sysax multi server cross-site scripting vulnerabilityAn issue was discovered in Sysax Multi Server 6.90. There is reflected XSS via the /scgi sid parameter.EPSS 3.1%5.4CVE-2024-53459Sysax multi server cross-site scripting vulnerabilitySysax Multi Server 6.99 is vulnerable to Cross Site Scripting (XSS) via the /scgi?sid parameter.EPSS 0.31%

Source: NIST National Vulnerability Database (record CVE-2013-10065), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.