CVE-2026-55005High· 8.8▾ TwilightHeap-based buffer overflow in Microsoft Exchange Server allows an authorized attacker to execute code over a network.
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 48.4 · 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 8.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.9%
0.9% → 1.0%
Last analysed / modified upstream
Heap-based buffer overflow in Microsoft Exchange Server allows an authorized attacker to execute code over a network.
exchange_server = 2016exchange_server = 2019exchange_server_subscription_edition < 15.02.2562.045Upgrade past the affected range:
exchange_server_subscription_edition 15.02.2562.045Connected by shared product, vendor, weakness, or advisory.
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