CVE-2026-93424High· 7.5▾ TwilightFastNetMon is a high-performance DDoS detector and sensor. In version 1.2.9 and earlier, peer_find_template() in src/netflow_plugin/netflow_collector.cpp and src/netflow_plugin/netflow_v9_collector.cpp returns a pointer into global_netfl…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Nov 6.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.3%
FastNetMon is a high-performance DDoS detector and sensor. In version 1.2.9 and earlier, peer_find_template() in src/netflow_plugin/netflow_collector.cpp and src/netflow_plugin/netflow_v9_collector.cpp returns a pointer into global_netflow9_templates after releasing the cache mutex. On deployments with at least two entries in netflow_ports, concurrent template redefinition and data-flowset processing can let add_update_peer_template() reassign the template and free its records vector while another listener dereferences the escaped pointer. An unauthenticated sender that can reach both NetFlow/IPFIX listener ports can trigger a heap-use-after-free and reliably crash FastNetMon. No fixed release is available as of this review.
fastnetmon <= 1.2.9Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-92694Medium· 5.9FastNetMon: IPv6 host counters map iterated without lock, racing concurrent inserts
CVE-2026-92695High· 8.2FastNetMon: Legacy pcap parse_packet() has no bounds checking, causing out-of-bounds read on truncated frames
CVE-2026-92693High· 8.2FastNetMon: IPv6 Fragment header dereferenced without bounds check in shared packet parser
CVE-2026-92698High· 8.2FastNetMon: sFlow header_size field trusted as parser capture length causes remote out-of-bounds read
CVE-2026-92697High· 7.5FastNetMon: NetFlow v9 unbounded strlen() on interface-description field causes remote out-of-bounds read
CVE-2026-48695High· 8.1FastNetMon Community Edition through 1.2.9 contains an OS command injection vulnerability in the MikroTik router integration plugin