Credential disclosure via unencrypted ULC HTTP traffic
Published Jun 24, 2025 · Updated Jun 24, 2025
Cleartext transmission in Kaleris Navis N4 before 4.0 allows man-in-the-middle attackers to read credentials from ULC traffic. The Ultra Light Client compresses application data with zlib and sends it to N4 servers over unencrypted HTTP, leaving credentials recoverable from captured packets. Exploitation requires a position from which client-to-server network traffic can be observed, and the reported consequence is disclosure without data alteration or service interruption.
Summary
What happened
Cleartext transmission in Kaleris Navis N4 before 4.0 allows man-in-the-middle attackers to read credentials from ULC traffic. The Ultra Light Client compresses application data with zlib and sends it to N4 servers over unencrypted HTTP, leaving credentials recoverable from captured packets. Exploitation requires a position from which client-to-server network traffic can be observed, and the reported consequence is disclosure without data alteration or service interruption.
The record
- CVE
- CVE-2025-5087
- Published
- Jun 24, 2025
- Updated
- Jun 24, 2025
- Vendor
- Kaleris
- Product
- Navis N4
- Classifications
- CWE-319, T1040
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 24, 2025CVE publishedPublication date reported by the CVE source.
- Jun 24, 2025Record 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=0 <4.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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