CVE-2026-90869EUVD-2026-113026GHSA-47X4-GRC2-RH4M
Pre-Authentication SSH Denial of Service via Malformed Public-Key Signature in Progress WS_FTP Server
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 2024.0.7, 2025.0.4
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: yes
- Technical impact: partial
Summary
The vulnerability affects Progress WS_FTP Server on Windows, specifically the shared SSH service that handles connections for all users. A remote attacker who knows a valid account's enrolled SSH public key can crash this service before authentication, causing a denial of service for everyone who relies on the server.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
A remote attacker who knows a valid account's enrolled SSH public key can terminate the shared SSH service in Progress Software WS_FTP Server versions prior to 2024.0.7 and 2025.0.4 on Windows.
Timeline
- CVE published
- First seen by cve.now
- CISA SSVC assessment
Exploitation: none · Automatable: yes · Technical impact: partial
- Record last updated
Affected versions
- Progress Software WS_FTP Server
fixed in 2024.0.7; fixed in 2025.0.4