Security readout for executives and security teams
Plain-English summary
Sysax Multi Server versions before 5.55 can be crashed or potentially taken over through the SSH login username field. An attacker does not need valid credentials. The highest business risk is an internet-exposed legacy file-transfer or remote-access server running this software.
Executive priority
Treat as urgent for any exposed legacy Sysax deployment. Prioritize confirming whether the product exists in the environment, then remove public SSH exposure and upgrade or retire affected systems.
Technical view
The issue is a stack-based buffer overflow in the Sysax Multi Server SSH service. Overlong username input during authentication is copied into a fixed-size stack buffer without bounds checking, enabling remote code execution in the service context. Public exploit references exist.
Likely exposure
Exposure is most likely where Sysax Multi Server is still deployed with SSH enabled, especially on internet-facing Windows servers. The source bundle identifies versions prior to 5.55, but does not provide a complete CPE inventory or deployment prevalence.
Exploitation context
The bundle cites Rapid7 Metasploit and Exploit-DB exploit references, so public exploit material exists. It does not cite CISA KEV or another source confirming active exploitation in the wild; KEV is marked false.
Researcher notes
Core evidence supports CWE-121 stack overflow via SSH username handling and RCE potential. The affected-version metadata is sparse, so validation should rely on product/version discovery and vendor confirmation. Avoid assuming current vendor support status from the bundle alone.
Mitigation direction
- Inventory Sysax Multi Server deployments and confirm installed versions.
- Upgrade or retire versions earlier than 5.55, following current Sysax guidance.
- Restrict SSH access to trusted networks or VPN paths.
- Disable the SSH service where it is not operationally required.
- Monitor authentication logs for unusual username lengths or repeated failures.
Validation and detection
- Check whether Sysax Multi Server is installed on Windows servers.
- Confirm whether SSH service is enabled and externally reachable.
- Record the installed version and compare it with 5.55.
- Review firewall rules, NAT, and remote-access exposure.
- Check logs for suspicious SSH authentication attempts.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-121: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2012-10060 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.3 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——VulnCheckVulnerability scoring details
Base CVSS 4.0 score
9.3CriticalVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ssh/sysax_ssh_username.rbCVE reference, VulnCheck · exploit
- https://www.exploit-db.com/exploits/18535CVE reference, VulnCheck · exploit
- https://www.exploit-db.com/exploits/18557CVE reference, VulnCheck · exploit
- https://web.archive.org/web/20120302203344/http://www.pwnag3.com/2012/02/sysax-multi-server-ssh-username-exploit.htmlCVE reference, VulnCheck · technical-description, exploit
- https://advisories.checkpoint.com/defense/advisories/public/2012/cpai-23-sepc.htmlCVE reference, VulnCheck · third-party-advisory
- https://www.sysax.com/CVE reference, VulnCheck · product
- https://www.vulncheck.com/advisories/sysax-multi-server-ssh-username-buffer-overflowCVE reference, VulnCheck · third-party-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Stack-based Buffer Overflow
Stack-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.