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Vulnerabilities

Vulnerability · CVE-2011-10029

Solar FTP Server fails to properly handle format strings passed to the USER command.

Published Aug 20, 2025 · catalog updated May 15, 2026 · Flexbyte Software Solar FTP Server

Last checked Oct 24, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2011-10029. EPSS is 1.08%. Act only if a listed version of Flexbyte Software Solar FTP Server is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.7
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.08%
Remediation
Vendor / distro source
Affected products
vendor Flexbyte Software Solar FTP Server 0 ≤2.1.1

Solar FTP Server fails to properly handle format strings passed to the USER command. When a specially crafted string containing format specifiers is sent, the server crashes due to a read access violation in the __output_1() function of sfsservice.exe. This results in a denial of service (DoS) condition.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Flexbyte Software Solar FTP Server 0 ≤2.1.10 ≤2.1.1

How to fix CVE-2011-10029

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2011-10029. EPSS is 1.08%. Act only if a listed version of Flexbyte Software Solar FTP Server is installed.

Which versions are affected?

Compare what you have installed with Flexbyte Software Solar FTP Server 0 ≤2.1.1 0 ≤2.1.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 1.08%. There is no CISA KEV listing. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 20, 2025 · EUVD

    Detected

    Solar FTP Server fails to properly handle format strings passed to the USER command. When a specially crafted string containing format specifiers is sent, the server crashes due to a read access violation in the __output_1() function of sfsservice.exe. This results in a denial of service (DoS) condition.

  2. May 15, 2026 · EUVD

    Updated

    Solar FTP Server fails to properly handle format strings passed to the USER command. When a specially crafted string containing format specifiers is sent, the server crashes due to a read access violation in the __output_1() function of sfsservice.exe. This results in a denial of service (DoS) condition.

Sources

  • CVE.orgVulnerability recordCVE-2011-10029

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2011-10029

    30-day exploitation probability 1.08%

    first.org
  • EUVDVulnerability recordEUVD-2011-5252

    Solar FTP Server fails to properly handle format strings passed to the USER command. When a specially crafted string containing format specifiers is sent, the server crashes due to a read access violation in the __output_1() function of sfsservice.exe. This results in a denial of

    euvd.enisa.europa.eu
  • Metasploit ModulesPublic exploit moduleauxiliary_dos/windows/ftp/solarftp_user

    Public module reference (normal). Module source is not copied into this catalog.

    rapid7.com

References

Freshness

Last verified in this catalog Oct 24, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 24, 2026
  • Metasploit ModulesOct 23, 2026
  • CVE.orgOct 21, 2026
  • EUVDOct 21, 2026