CVE-2026-45503High· 8.1▾ TwilightImproper authorization in Microsoft Exchange Server allows an authorized attacker to disclose information over a network.
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 44.6 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 28.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.4%
Improper authorization in Microsoft Exchange Server allows an authorized attacker to disclose information over a network.
exchange_server = 2016exchange_server = 2019exchange_server_subscription_edition < 15.02.2562.043Upgrade past the affected range:
exchange_server_subscription_edition 15.02.2562.043Connected by shared product, vendor, weakness, or advisory.
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CVE-2026-45504High· 8.8Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
CVE-2026-45502Medium· 5.0Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to disclose information over a network.
CVE-2026-45501Medium· 6.5Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to perform spoofing over a network.
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