CVE-2026-62911 — HIGH (8.0)

Q: What is CVE-2026-62911?

CVE-2026-62911 is a vulnerability with a CVSS score of 8.0 (HIGH). Authentication bypass by capture-replay in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

Q: How severe is CVE-2026-62911?

CVE-2026-62911 has been rated HIGH with a CVSS base score of 8.0/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-62911?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Exchange Server, Microsoft Exchange Server Subscription Edition.

Vulnerability Description

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

CVSS Score

8.0

HIGH

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Microsoft	Exchange Server	2016
Microsoft	Exchange Server Subscription Edition	< 15.02.2562.046

Related Weaknesses (CWE)

CWE-294

References

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

FAQ

What is CVE-2026-62911?

CVE-2026-62911 is a vulnerability with a CVSS score of 8.0 (HIGH). Authentication bypass by capture-replay in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

How severe is CVE-2026-62911?

CVE-2026-62911 has been rated HIGH with a CVSS base score of 8.0/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-62911?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Exchange Server, Microsoft Exchange Server Subscription Edition.