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THREAT OPS › Threat News › [NVD] CVE-2026-67277 — RouterOS accepts a "related" btest connection before the corresponding primary session has completed authentication. An unauthenticated client can use this state to start an IPv4 UDP test. With "random-data=false", the sender transmits an uninitialized tail from a kernel packet b

[NVD] CVE-2026-67277 — RouterOS accepts a "related" btest connection before the corresponding primary session has completed authentication. An unauthenticated client can use this state to start an IPv4 UDP test. With "random-data=false", the sender transmits an uninitialized tail from a kernel packet b

mednvdPublished 2026-09-05

CVE-2026-67277 CVSS: None Published: 2026-09-05T20:17:18.120

RouterOS accepts a "related" btest connection before the corresponding primary session has completed authentication. An unauthenticated client can use this state to start an IPv4 UDP test. With "random-data=false", the sender transmits an uninitialized tail from a kernel packet buffer. A separate unchecked, inverted packet-size interva

Indicators of compromise

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-67277