Security readout for executives and security teams
Plain-English summary
ComSndFTP FTP Server 1.3.7 Beta can let an unauthenticated remote attacker take control of the server through a malformed FTP username. The provided sources include public exploit references, but no KEV listing or cited evidence of active exploitation.
Executive priority
Treat as urgent if any affected server exists, because compromise could be remote and unauthenticated. Prioritize discovery first; if found, remove or isolate immediately rather than waiting for exploitation indicators.
Technical view
The issue is a CWE-134 format string vulnerability in the FTP USER command. The source bundle states an attacker can overwrite a hardcoded WSACleanup function pointer and redirect execution with a ROP chain, resulting in remote code execution without authentication.
Likely exposure
Exposure is any host running ComSndFTP FTP Server 1.3.7 Beta, especially if FTP is reachable from the internet. Because the affected version is an old beta FTP server, exposure may be concentrated in legacy or forgotten Windows deployments.
Exploitation context
Public exploit material exists in Metasploit and Exploit-DB references. The provided bundle marks KEV as false and does not cite confirmed active exploitation, so active exploitation should not be claimed from these sources alone.
Researcher notes
Evidence supports unauthenticated RCE for ComSndFTP FTP Server 1.3.7 Beta only. The bundle includes exploit references and a third-party advisory, but no confirmed vendor patch, CPE data, or KEV active-exploitation signal.
Mitigation direction
- Inventory FTP services and remove ComSndFTP FTP Server 1.3.7 Beta where found.
- If removal is delayed, block external access and restrict FTP to trusted networks.
- Check vendor or maintainer guidance; sources do not identify a confirmed patch.
- Replace unsupported beta FTP software with a maintained service.
- Monitor FTP logs for malformed USER command attempts.
Validation and detection
- Confirm product and version through authorized asset inventory or host inspection.
- Verify internet-facing FTP endpoints are not running ComSndFTP 1.3.7 Beta.
- Review firewall rules for any externally reachable FTP access.
- Confirm compensating controls block unauthenticated access to affected instances.
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-134: 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-2012-10055 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.
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——Primary CVE scoreVulnerability 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
Source materials
- CVE List V5 sourceCVE List V5
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ftp/comsnd_ftpd_fmtstr.rbCVE reference · exploit
- https://www.exploit-db.com/exploits/19024CVE reference · exploit
- https://www.exploit-db.com/exploits/19177CVE reference · exploit
- https://web.archive.org/web/20120317214524/http://ftp.comsnd.com/CVE reference · product
- https://www.vulncheck.com/advisories/comsndftp-user-format-string-rceCVE reference · 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.
Use of Externally-Controlled Format String
Use of Externally-Controlled Format String represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.