CVE-2026-62911

HIGH CVSS 3.1: 8.0 EPSS 0.72%
Updated Aug 13, 2026
Microsoft
Parameter Value
CVSS 8.0 (HIGH)
Affected Versions before 15.02.2562.046
Fixed In 15.02.2562.046
Type CWE-294 (Authentication Bypass by Capture-Replay)
Vendor Microsoft
Public PoC No

Authentication bypass by capture-replay in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
Required
User action required

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Vulnerable Products 38

Configuration From (including) Up to (excluding)
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2016:-:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_1:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_10:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_11:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_12:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_13:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_14:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_15:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_16:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_17:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_18:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_19:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_2:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_20:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_21:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_22:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_3:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_4:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_5:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_6:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_7:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_8:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_9:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2019:-:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_1:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_10:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_11:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_12:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_13:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_2:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_3:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_4:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_5:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_6:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_7:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_8:*:*:*:*:*:*
Microsoft Exchange_Server
cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_9:*:*:*:*:*:*
Microsoft Exchange_Server_Subscription_Edition
cpe:2.3:a:microsoft:exchange_server_subscription_edition:*:*:*:*:*:*:*:*
15.02.2562.046