MSRC-CVE-2026-62914 — Microsoft Exchange Server Spoofing Vulnerability

Summary

Impact: Spoofing. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

Details

According to the CVSS metrics, successful exploitation of this vulnerability could lead to major loss of confidentiality (C:H). What does that mean for this vulnerability?
An attacker who successfully exploited this vulnerability could craft a payload allowing them to access sensitive user data, which could result in unauthorized access to the victim's account or compromise of other confidential information.

Security updates
15.01.2507.072 — https://support.microsoft.com/help/5121576
15.02.2562.046 — https://support.microsoft.com/help/5121573
15.02.1748.049 — https://support.microsoft.com/help/5121574
15.02.1544.044 — https://support.microsoft.com/help/5121575

Vulnerabilities 1

High 7.3

CVE-2026-62914

Microsoft Exchange Server Spoofing Vulnerability

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an authorized attacker to perform spoofing over a network.

Microsoft Microsoft Exchange Server 2016 Cumulative Update 23 Microsoft Exchange Server Subscription Edition RTM Microsoft Exchange Server 2019 Cumulative Update 14

Aug 11, 2026

Revision history

2026-08-11 #1
Information published.

References

CVE-2026-62914 Microsoft Exchange Server Spoofing Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62914
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
Common Vulnerability Scoring System
https://www.first.org/cvss