CVE-2026-48686 – FastNetMon Community Edition Buffer Overflow Vulnerability

CVE ID :CVE-2026-48686

Published : May 26, 2026, 4:16 p.m. | 15 minutes ago

Description :FastNetMon Community Edition through 1.2.9 contains a stack-based buffer overflow in the BGP NLRI (Network Layer Reachability Information) decoder. The function decode_bgp_subnet_encoding_ipv4_raw() in src/bgp_protocol.cpp reads prefix_bit_length directly from the BGP packet (line 99) without validating it is 32 causes undefined behavior.

Severity: 0.0 | NA

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