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Kaleris NAVIS N4 ULC (Ultra Light Client) communicates insecurely using zlib-compressed data over HTTP. An attacker capable of observing network traffic between Ultra Light Clients and N4 servers can extract sensitive information, including plaintext credentials.

CVE-2025-5087 is a vulnerability identified in the Kaleris Navis N4 Ultra Light Client (ULC), a software product used primarily in terminal operating systems and logistics management. The vulnerability arises from the use of insecure communication protocols: the Navis N4 ULC transmits data compressed with zlib over unencrypted HTTP connections. This cleartext transmission allows an attacker with network visibility—such as someone positioned on the same network segment or capable of intercepting traffic—to capture sensitive information, including plaintext credentials. The vulnerability is classified under CWE-319, which pertains to the cleartext transmission of sensitive information. The CVSS v4.0 base score is 6.0, indicating a medium severity level. The vector indicates that the attack requires network access (AV:N), has high attack complexity (AC:H), no privileges required (PR:N), and user interaction is needed (UI:P). The vulnerability impacts confidentiality (VC:H) but not integrity or availability. No known exploits are currently reported in the wild, and no patches have been published as of the date of disclosure. The affected version is listed as '0', which likely indicates an initial or baseline version of the product. The core technical issue is the lack of encryption or secure transport layer protocols (such as TLS) protecting sensitive data in transit, making it susceptible to passive eavesdropping attacks. This is particularly critical in environments where credentials or other sensitive operational data are transmitted, as interception could lead to unauthorized access or further compromise of the logistics infrastructure.

Detailed information about CVE-2025-5087: CWE-319 Cleartext Transmission of Sensitive Information in Kaleris Navis N4 affecting Kaleris Navis N4. Get real-time 

CVE-2025-5087: CWE-319 Cleartext Transmission of Sensitive Information in Kaleris Navis N4 - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2025-5087: CWE-319 Cleartext Transmission of Sensitive Information in Kaleris Navis N4

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