CVE-2026-48697

Description

FastNetMon Community Edition through 1.2.9 does not verify TLS certificates on outbound HTTPS connections. The execute_web_request_secure() function in src/fast_library.cpp creates a boost::asio::ssl::context with tls_client mode and calls set_default_verify_paths() to load CA certificates, but never calls set_verify_mode(boost::asio::ssl::verify_peer). Without this call, OpenSSL performs the TLS handshake without validating the server's certificate chain, making all HTTPS connections vulnerable to man-in-the-middle attacks. This function is used for telemetry reporting to community-stats.fastnetmon.com, which sends system information including CPU model, kernel version, traffic statistics, and software configuration. An attacker can intercept and modify this data or redirect it to a malicious server.

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Produits concernés

• Pavel-odintsov fastnetmon

Scores CVSS

Faiblesses (CWE)

• CWE-295

Références

• https://github.com/pavel-odintsov/fastnetmon Product
• https://github.com/pavel-odintsov/fastnetmon/blob/master/src/fast_library.cpp Product
• https://lorikeetsecurity.com/blog/fastnetmon-cve-2026-48697-missing-tls-validation Third Party Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories