CVE-2026-48682

A flaw was found in FastNetMon Community Edition. This vulnerability, located in the IPv4 packet parser, allows a remote attacker to send specially crafted network packets. This can lead to an out-of-bounds read, potentially disclosing sensitive information or causing the system to crash, resulti...

CVE-2026-48682: Out-of-bounds Read

FastNetMon Community Edition through 1.2.9 contains an out-of-bounds read in the IPv4 packet parser. In src/simplepacketparserng.cpp, after validating that the packet contains at least sizeofipv4headert bytes 20 bytes, the code advances the localpointer by '4 ipv4header-getihl' line 164 without...

Linux Distros Unpatched Vulnerability : CVE-2026-48696

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - FastNetMon Community Edition through 1.2.9 has a buffer overflow, a different vulnerability than CVE-2026-48686 and CVE-2026-48689. CVE-2026-48696 Note that...

Linux Distros Unpatched Vulnerability : CVE-2026-48687

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - FastNetMon Community Edition through 1.2.9 contains an OS command injection vulnerability in the Juniper router integration plugin. The log function in...

CVE-2026-48691

FastNetMon Community Edition through 1.2.9 contains an integer overflow in the BGP ASPATH attribute encoder. In src/bgpprotocol.hpp, the IPv4UnicastAnnounce::getattributes function computes attributelength as 'sizeofbgpaspathsegmentelementt + this-aspathasns.size sizeofuint32t' and stores it in a...

CVE-2026-48695: Improper Neutralization of Special Elements used in an OS Command

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-2026-48685: Improper Handling of Length Parameter Inconsistency

FastNetMon Community Edition through 1.2.9 has out-of-bounds memory access because it incorrectly parses BGP path attributes with the extended length flag set. In src/bgpprotocol.hpp, the parserawbgpattribute function correctly identifies when extendedlengthbit is set and sets lengthoflengthfield...

CVE-2026-48696: Buffer Copy without Checking Size of Input

FastNetMon Community Edition through 1.2.9 has a buffer overflow, a different vulnerability than CVE-2026-48686 and CVE-2026-48689...

PT-2026-43270

Name of the Vulnerable Software and Affected Versions FastNetMon Community Edition versions prior to 1.2.10 Description An out-of-bounds read exists in the NetFlow v9 data flowset processor within the src/netflow plugin/netflow v9 collector.cpp file. The Data template branch iterates over flow...

CVE-2026-48694: Improper Neutralization of Special Elements used in a Command

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-2026-48696

Technical details about CVE-2026-48696 are not publicly provided in the supplied documents. Monitor for updates from vendors and security advisories; no affected products, vectors, or remediation are specified here.

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 +...

PT-2026-43354

Name of the Vulnerable Software and Affected Versions FastNetMon Community Edition versions prior to 1.3.0 Description A configuration injection issue exists in the Juniper router integration plugin. In the file src/juniper plugin/fastnetmon juniper.php, the variable IP ATTACK received from argv1...

CVE-2026-48683: Out-of-bounds Read

FastNetMon Community Edition through 1.2.9 contains an out-of-bounds read vulnerability in the NetFlow v9 data flowset processor. In src/netflowplugin/netflowv9collector.cpp, the Data template branch lines 1695-1702 iterates over flow records without performing a per-iteration bounds check agains...

CVE-2026-48697: Improper Certificate Validation

FastNetMon Community Edition through 1.2.9 does not verify TLS certificates on outbound HTTPS connections. The executewebrequestsecure function in src/fastlibrary.cpp creates a boost::asio::ssl::context with tlsclient mode and calls setdefaultverifypaths to load CA certificates, but never calls...

CVE-2026-48688: Out-of-bounds Read

FastNetMon Community Edition through 1.2.9 contains multiple out-of-bounds reads in the BGP MPREACHNLRI IPv6 attribute decoder. The function decodempreachipv6 in src/bgpprotocol.cpp contains a TODO comment at line 156 explicitly acknowledging 'we should add sanity checks to avoid reads after...

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...

CVE-2026-48696

FastNetMon Community Edition through 1.2.9 has a buffer overflow, a different vulnerability than CVE-2026-48686 and CVE-2026-48689...

CVE-2026-48686: Buffer Copy without Checking Size of Input

FastNetMon Community Edition through 1.2.9 contains a stack-based buffer overflow in the BGP NLRI Network Layer Reachability Information decoder. The function decodebgpsubnetencodingipv4raw in src/bgpprotocol.cpp reads prefixbitlength directly from the BGP packet line 99 without validating it is ...

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...