CVE-2026-66307High· 7.5▾ TwilightInteger underflow (wrap or wraparound) in Skype for Business allows an unauthorized attacker to deny service over a network.
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.2 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Sep 10.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.6%
Last analysed / modified upstream
0.6% → 1.2%
Integer underflow (wrap or wraparound) in Skype for Business allows an unauthorized attacker to deny service over a network.
skype_for_business_server = 2015skype_for_business_server = 2019skype_for_business_server_subscription_edition = 7.0.2046.849Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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