CVE-2026-61503
Rejetto HFS < 3.2.1 Username Enumeration via Login Response Differences
- State
- Published
- Severity
- 6.9 Medium
- Published
- Jul 13, 2026
- Updated
- Oct 1, 2026
- Reserved
- Jul 10, 2026
Description
Rejetto HFS 3.0.0 through 3.2.0 returns observably different responses from its login endpoint depending on whether the submitted username exists. A remote unauthenticated attacker can use this to confirm valid account names, including the default admin account, facilitating password-guessing and session-forgery attacks.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N | VulnCheck |
Weaknesses
- CWE-204 Observable Response Discrepancy
Affected Products
| Product | Versions |
|---|---|
hfsrejetto |
|
References
- hfs v3.2.1 Release Notesrelease-notespatch
- https://www.vulncheck.com/advisories/rejetto-hfs-username-enumeration-via-login-response-differencesthird-party-advisory
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