CVE-2026-90869Not scored
CVE-2026-90869: Pre-Authentication SSH Denial of Service via Malformed Public-Key Signature in Progress WS_FTP Server
Progress Software · WS_FTP Server
Vendor fix available · Affected: Progress Software WS_FTP Server · Exploitation: not established
ExploitationNot established
Not in CISA KEV as of catalogue 2026.11.13 (13 Nov)
- In CISA KEV: not seen
- Exploited (reported): not seen
- Scanning observed: not seen
- Proof of concept public: not seen
- Not establishedNothing in the sources we check
0.4%probability of exploitation in the next 30 days
29th percentile
050100
Higher than 29% of scored CVEs
Not scored yet. NVD has not published a CVSS score.
DescriptionNVD
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.
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- Progress Software
- Published
- October 2026
Coverage1 article · 1 outlet
First in our coverage: SecurityOnline, 30 Oct.
- Progress patches 15 WS_FTP Server flaws, including CVE-2026-84295SecurityOnline · first in our coverage · mentions it in passing
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