CVE-2026-122130highCWE-190

CVE-2026-122130: high-severity vulnerability in CESNET ipfixcol2

CESNET ipfixcol2 2.3.0 before 2.9.0 Buffer Overflow via Forwarder Output Plugin

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.3epss 0.3%
CESNET ipfixcol2 2.3.0 before 2.9.0 contains an integer overflow vulnerability in the Forwarder output plugin that allows unauthenticated IPFIX exporters to overflow a heap buffer by wrapping uint16_t message length counters. Attackers can send near-65535-byte data sets and large templates to a collector forwarding over TCP to crash it and perform 2-byte writes to attacker-influenced addresses.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
Affected products
CESNET · ipfixcol2
Related CVEs — CESNET ipfixcol2

In the same product, most dangerous first.

CVE-2026-122129MEDIUMCESNET ipfixcol2 2.7.1 before 2.9.0 Memory Exhaustion via TCP LZ4 DecoderEPSS 0.4%CVE-2026-122127HIGHCESNET ipfixcol2 2.7.1 before 2.9.0 Heap Buffer Overflow via TCP LZ4 DecoderEPSS 0.4%