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.
References
Configurations
History
27 May 2026, 14:26
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:a:pavel-odintsov:fastnetmon:*:*:*:*:community:*:*:* | |
| References | () https://github.com/pavel-odintsov/fastnetmon - Product | |
| References | () https://github.com/pavel-odintsov/fastnetmon/blob/master/src/netflow_plugin/netflow_v9_collector.cpp - Product | |
| References | () https://lorikeetsecurity.com/blog/fastnetmon-cve-2026-48684-netflow-v9-options-oob - Third Party Advisory | |
| First Time |
Pavel-odintsov
Pavel-odintsov fastnetmon |
26 May 2026, 21:16
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-125 | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 6.5 |
26 May 2026, 16:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-26 16:16
Updated : 2026-05-27 14:26
NVD link : CVE-2026-48684
Mitre link : CVE-2026-48684
CVE.ORG link : CVE-2026-48684
JSON object : View
Products Affected
pavel-odintsov
- fastnetmon
CWE
CWE-125
Out-of-bounds Read