CVE-2026-48686
published 2026-05-26CVE-2026-48686: FastNetMon Community Edition through 1.2.9 contains a stack-based buffer overflow in the BGP NLRI (Network Layer Reachability Information) decoder. The…
PriorityP357critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
0.56%
42.6th percentile
FastNetMon Community Edition through 1.2.9 contains a stack-based buffer overflow in the BGP NLRI (Network Layer Reachability Information) decoder. The function decode_bgp_subnet_encoding_ipv4_raw() in src/bgp_protocol.cpp reads prefix_bit_length directly from the BGP packet (line 99) without validating it is 32 causes undefined behavior.
Affected
1 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| pavel-odintsov | fastnetmon | <= 1.2.9 | — |
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VulDB
FastNetMon Community Edition up to 1.2.9 BGP NLRI Decoder src/bgp_protocol.cpp decode_bgp_subnet_encoding_ipv4_raw stack-based overflow (Nessus ID 321184)
vuldb·2026-06-19·CVSS 9.8
CVE-2026-48686 [CRITICAL] FastNetMon Community Edition up to 1.2.9 BGP NLRI Decoder src/bgp_protocol.cpp decode_bgp_subnet_encoding_ipv4_raw stack-based overflow (Nessus ID 321184)
A vulnerability, which was classified as critical, was found in FastNetMon Community Edition up to 1.2.9. The affected element is the function decode_bgp_subnet_encoding_ipv4_raw of the file src/bgp_protocol.cpp of the component BGP NLRI Decoder. Executing a manipulation can lead to stack-based buffer overflow.
This vulnerability appears as CVE-2026-48686. The attacker needs to be present on the local network. There is no available exploit.
GHSA
GHSA-vpc6-j22r-6mf9: FastNetMon Community Edition through 1
ghsa_unreviewed·2026-05-26·CVSS 9.8
CVE-2026-48696 [CRITICAL] CWE-120 GHSA-vpc6-j22r-6mf9: FastNetMon Community Edition through 1
FastNetMon Community Edition through 1.2.9 has a buffer overflow, a different vulnerability than CVE-2026-48686 and CVE-2026-48689.
GHSA
GHSA-7p7c-c3vp-p386: FastNetMon Community Edition through 1
ghsa_unreviewed·2026-05-26
CVE-2026-48686 [CRITICAL] CWE-120 GHSA-7p7c-c3vp-p386: FastNetMon Community Edition through 1
FastNetMon Community Edition through 1.2.9 contains a stack-based buffer overflow in the BGP NLRI (Network Layer Reachability Information) decoder. The function decode_bgp_subnet_encoding_ipv4_raw() in src/bgp_protocol.cpp reads prefix_bit_length directly from the BGP packet (line 99) without validating it is 32 causes undefined behavior.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-48686 fastnetmon: stack-based buffer overflow in the BGP NLRI decoder [epel-all]
bugzilla·2026-05-28·CVSS 9.8
CVE-2026-48686 [CRITICAL] CVE-2026-48686 fastnetmon: stack-based buffer overflow in the BGP NLRI decoder [epel-all]
CVE-2026-48686 fastnetmon: stack-based buffer overflow in the BGP NLRI decoder [epel-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Bugzilla
CVE-2026-48686 fastnetmon: stack-based buffer overflow in the BGP NLRI decoder [fedora-all]
bugzilla·2026-05-28·CVSS 9.8
CVE-2026-48686 [CRITICAL] CVE-2026-48686 fastnetmon: stack-based buffer overflow in the BGP NLRI decoder [fedora-all]
CVE-2026-48686 fastnetmon: stack-based buffer overflow in the BGP NLRI decoder [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Bugzilla
CVE-2026-48696 fastnetmon: stack-based buffer overflow in ExaBGP action handler
bugzilla·2026-05-26·CVSS 9.8
CVE-2026-48696 [CRITICAL] CVE-2026-48696 fastnetmon: stack-based buffer overflow in ExaBGP action handler
CVE-2026-48696 fastnetmon: stack-based buffer overflow in ExaBGP action handler
FastNetMon Community Edition through 1.2.9 has a buffer overflow, a different vulnerability than CVE-2026-48686 and CVE-2026-48689.
Bugzilla
CVE-2026-48686 fastnetmon: stack-based buffer overflow in the BGP NLRI decoder
bugzilla·2026-05-26·CVSS 9.8
CVE-2026-48686 [CRITICAL] CVE-2026-48686 fastnetmon: stack-based buffer overflow in the BGP NLRI decoder
CVE-2026-48686 fastnetmon: stack-based buffer overflow in the BGP NLRI decoder
FastNetMon Community Edition through 1.2.9 contains a stack-based buffer overflow in the BGP NLRI (Network Layer Reachability Information) decoder. The function decode_bgp_subnet_encoding_ipv4_raw() in src/bgp_protocol.cpp reads prefix_bit_length directly from the BGP packet (line 99) without validating it is 32 causes undefined behavior.
2026-05-26
Published