Unauthenticated username enumeration via divergent login replies
Published Jul 13, 2026 · Updated Jul 13, 2026
Username enumeration in Rejetto HFS 3.0.0 through 3.2.0 allows remote attackers to confirm valid accounts through login responses. The login handler returns a different reply for an unknown username than for a valid username with an incorrect password. No authentication is required, and the disclosure exposes account names, including the default administrator name, for follow-on password guessing.
Summary
What happened
Username enumeration in Rejetto HFS 3.0.0 through 3.2.0 allows remote attackers to confirm valid accounts through login responses. The login handler returns a different reply for an unknown username than for a valid username with an incorrect password. No authentication is required, and the disclosure exposes account names, including the default administrator name, for follow-on password guessing.
The record
- CVE
- CVE-2026-61503
- Published
- Jul 13, 2026
- Updated
- Jul 13, 2026
- Vendor
- Rejetto
- Product
- HFS
- Classifications
- T1087
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 13, 2026CVE publishedPublication date reported by the CVE source.
- Jul 13, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=3.0.0 <3.2.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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