CVE-2026-48690: Heap-based Buffer Overflow

FastNetMon Community Edition through 1.2.9 contains an integer overflow vulnerability in the packet capture buffer allocation. In src/packetstorage.hpp, the allocatebuffer function computes memorysizeinbytes as 'buffersizeinpackets maxcapturedpacketsize + sizeoffastnetmonpcappkthdrt +...

EUVD-2026-31949

FastNetMon Community Edition through 1.2.9 contains an OS command injection vulnerability in the MikroTik router integration plugin. The log function in src/mikrotikplugin/fastnetmonmikrotik.php lines 107-108 constructs shell commands by concatenating the $msg parameter directly into exec calls:...

CVE-2026-48693

FastNetMon Community Edition through 1.2.9 is vulnerable to a local symlink attack via predictable file paths in /tmp. The statistics file path defaults to '/tmp/fastnetmon.dat' src/fastnetmon.cpp line 159. The printscreencontentsintofile function src/fastnetmonlogic.cpp line 2186 opens this path...

FastNetMon security vulnerability

FastNetMon is a high-performance DDoS detector/sensor developed by Pavel Odintsov, based on multiple packet capture engines. Versions of FastNetMon prior to 1.2.9 contain security vulnerabilities. These vulnerabilities stem from the log function in the Juniper router integration plugin, which doe...

CVE-2026-48693

FastNetMon Community Edition through 1.2.9 is vulnerable to a local symlink attack via predictable file paths in /tmp. The statistics file path defaults to '/tmp/fastnetmon.dat' src/fastnetmon.cpp line 159. The printscreencontentsintofile function src/fastnetmonlogic.cpp line 2186 opens this path...

CVE-2026-48693: Improper Link Resolution Before File Access

FastNetMon Community Edition through 1.2.9 is vulnerable to a local symlink attack via predictable file paths in /tmp. The statistics file path defaults to '/tmp/fastnetmon.dat' src/fastnetmon.cpp line 159. The printscreencontentsintofile function src/fastnetmonlogic.cpp line 2186 opens this path...

FastNetMon security vulnerability

FastNetMon is a high-performance DDoS detector/sensor developed by Pavel Odintsov, based on multiple packet capture engines. The FastNetMon Community Edition 1.2.9 and earlier versions have security vulnerabilities, which stem from buffer overflow exploits...

PT-2026-43310

Name of the Vulnerable Software and Affected Versions FastNetMon Community Edition versions prior to 1.2.10 Description An integer overflow exists in the BGP AS PATH attribute encoder. The IPv4UnicastAnnounce::get attributes function calculates the attribute length and stores it in a uint8 t fiel...

CVE-2026-48695

FastNetMon Community Edition through 1.2.9 contains an OS command injection vulnerability in the MikroTik router integration plugin. The log function in src/mikrotikplugin/fastnetmonmikrotik.php lines 107-108 constructs shell commands by concatenating the $msg parameter directly into exec calls:...

CVE-2026-48684

FastNetMon Community Edition through 1.2.9 contains an out-of-bounds read in the NetFlow v9 options template parser. In processnetflowv9optionstemplate src/netflowplugin/netflowv9collector.cpp, the scope parsing loop lines 224-229 iterates until scopesoffset reaches the attacker-controlled...

PT-2026-43309

Name of the Vulnerable Software and Affected Versions FastNetMon Community Edition versions prior to 1.2.10 Description An integer overflow occurs during packet capture buffer allocation in the allocate buffer function. The software calculates memory size in bytes using 32-bit unsigned integer...

EUVD-2026-31840

FastNetMon Community Edition through 1.2.9 contains an out-of-bounds read in the NetFlow v9 options template parser. In processnetflowv9optionstemplate src/netflowplugin/netflowv9collector.cpp, the scope parsing loop lines 224-229 iterates until scopesoffset reaches the attacker-controlled...

CVE-2026-48690

FastNetMon Community Edition through 1.2.9 contains an integer overflow vulnerability in the packet capture buffer allocation. In src/packetstorage.hpp, the allocatebuffer function computes memorysizeinbytes as 'buffersizeinpackets maxcapturedpacketsize + sizeoffastnetmonpcappkthdrt +...

CVE-2026-48695

FastNetMon Community Edition through 1.2.9 contains an OS command injection vulnerability in the MikroTik router integration plugin. The log function in src/mikrotikplugin/fastnetmonmikrotik.php lines 107-108 constructs shell commands by concatenating the $msg parameter directly into exec calls:...

EUVD-2026-31948

FastNetMon Community Edition through 1.2.9 contains a configuration injection vulnerability in the Juniper router integration plugin. In src/juniperplugin/fastnetmonjuniper.php, the $IPATTACK variable received from argv1 is directly interpolated into Juniper NETCONF set-configuration commands at...

CVE-2026-48689: Out-of-bounds Write

FastNetMon Community Edition through 1.2.9 contains an off-by-one heap-based buffer overflow in the dynamicbinarybuffert class src/dynamicbinarybuffer.hpp. Five methods appenddynamicbuffer, appenddataaspointer, appenddataasobjectptr, memcpyfromptr, memcpyfromobjectptr use an incorrect bounds chec...

CVE-2026-48689

FastNetMon Community Edition through 1.2.9 contains an off-by-one heap-based buffer overflow in the dynamicbinarybuffert class src/dynamicbinarybuffer.hpp. Five methods appenddynamicbuffer, appenddataaspointer, appenddataasobjectptr, memcpyfromptr, memcpyfromobjectptr use an incorrect bounds chec...

CVE-2026-48689

FastNetMon Community Edition through 1.2.9 contains an off-by-one heap-based buffer overflow in the dynamicbinarybuffert class src/dynamicbinarybuffer.hpp. Five methods appenddynamicbuffer, appenddataaspointer, appenddataasobjectptr, memcpyfromptr, memcpyfromobjectptr use an incorrect bounds chec...

CVE-2026-48694

FastNetMon Community Edition through 1.2.9 contains a configuration injection vulnerability in the Juniper router integration plugin. In src/juniperplugin/fastnetmonjuniper.php, the $IPATTACK variable received from argv1 is directly interpolated into Juniper NETCONF set-configuration commands at...

CVE-2026-48695

FastNetMon Community Edition through 1.2.9 contains an OS command injection vulnerability in the MikroTik router integration plugin. The log function in src/mikrotikplugin/fastnetmonmikrotik.php lines 107-108 constructs shell commands by concatenating the $msg parameter directly into exec calls:...