CVE-2026-62911

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

CVSS 3.1

8.0CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

EPSS

0.7% chance of exploitation in the next 30 days; higher than 52% of CVEs (scores of 2026-10-25)

CWE

CWE-294

Published

2026-08-11

Modified

2026-10-14

Record from

the NVD, synced 2026-10-19

Affected

• microsoft:exchange_server
• microsoft:exchange_server_subscription_edition

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62911
• https://github.com/hypnguyen1209/CVE-2026-62911

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