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CVE-2026-66307

Estado: AnalizadaAlta (7.5)—

Integer underflow (wrap or wraparound) in Skype for Business allows an unauthorized attacker to deny service over a network.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

AV:N, PR:N, UI:N indica explotación remota sin privilegios (T1190). Integer underflow causa DoS por consumo de recursos (T1499.004). CVSS A:H confirma disponibilidad comprometida.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Tecnologías afectadas (2)

Microsoft — Skype FOR Business ServerMicrosoft — Skype FOR Business Server Subscription Edition

CWE

Referencias

JSON original (NVD)

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