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CVE-2026-48684

6.5 MEDIUM

FastNetMon Community Edition through 1.2.9 contains an out-of-bounds read in the NetFlow v9 options template parser

Published: 2026-05-26 · Last updated: 2026-05-27

Severity and scoring

CVSS
6.5 MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
CWE
CWE-125

Affected products

VendorProduct
pavel-odintsovfastnetmon

Description

FastNetMon Community Edition through 1.2.9 contains an out-of-bounds read in the NetFlow v9 options template parser. In process_netflow_v9_options_template() (src/netflow_plugin/netflow_v9_collector.cpp), the scope parsing loop (lines 224-229) iterates until scopes_offset reaches the attacker-controlled option_scope_length value, reading netflow9_template_flowset_record_t structures at each step. No bounds check validates that (zone_address + scopes_offset + sizeof(record)) stays within the flowset. The same issue affects the options field loop (lines 241-257) with option_length. Furthermore, option_scope_length is not validated to be a multiple of sizeof(netflow9_template_flowset_record_t), potentially causing misaligned reads. An attacker can trigger reads past the end of the UDP packet buffer.

Source: NVD

References

Related CVEs

Same vendor

  • CVE-2026-48689 — FastNetMon Community Edition through 1.2.9 contains an off-by-one heap-based buffer overflow in the dynamic_binary_buffer_t class (src/dy... (9.8 CRITICAL)
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  • CVE-2026-48695 — FastNetMon Community Edition through 1.2.9 contains an OS command injection vulnerability in the MikroTik router integration plugin (8.1 HIGH)
  • CVE-2026-48694 — FastNetMon Community Edition through 1.2.9 contains a configuration injection vulnerability in the Juniper router integration plugin (8.1 HIGH)
  • CVE-2026-48697 — FastNetMon Community Edition through 1.2.9 does not verify TLS certificates on outbound HTTPS connections (7.4 HIGH)

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