CVE-2026-62911High· 8.0▾ MidnightPoC availableAuthentication bypass by capture-replay in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 44 · likelihood 0.1 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Public exploit / PoC code seen in 1 source. Availability, not in-the-wild use.
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
1.3%
Last analysed / modified upstream
3 GitHub repos (last check)
Authentication bypass by capture-replay in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
exchange_server = 2016exchange_server = 2019exchange_server_subscription_edition < 15.02.2562.046Upgrade past the affected range:
exchange_server_subscription_edition 15.02.2562.046Connected by shared product, vendor, weakness, or advisory.
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