CVE-2026-67277

Registro da vulnerabilidade com dados oficiais do NIST NVD, CISA KEV e FIRST EPSS.

Descrição

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 interval causes unsigned integer underflow, anomalously large fragmented output, and can restart the RouterOS kernel. This issue was fixed in versions: 6.49.21 (Long-term), 7.23.4 (Long-term) and 7.24.2 (Stable)

CVSS 3.x: 8.2 HIGH
Publicada: 05/09/2026
Atualizada: 11/09/2026
Status NVD: Analyzed

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

Fraqueza: CWE-306

Fonte:NIST NVD· coletado 15/10/2026, 23:58

Exploração

No catálogo CISA KEV: Sim, desde 10/09/2026
Usada por ransomware: Não confirmado
Prazo CISA: 13/09/2026
EPSS (FIRST): 1.6%

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Fonte:CISA KEV· coletado 15/10/2026, 23:58

Referências

Links publicados no registro oficial

Alguns navegadores bloqueiam sites oficiais abertos a partir da pré-visualização; copie o endereço para abrir em outra aba: https://nvd.nist.gov/vuln/detail/CVE-2026-67277