CVE-2026-47631: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Microsoft Microsoft Exchange Server 2016 Cumulative Update 23
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.
AI Analysis
Technical Summary
This vulnerability (CWE-79) in Microsoft Exchange Server 2016 Cumulative Update 23 allows an attacker to inject malicious scripts due to improper input neutralization during web page generation. The flaw enables cross-site scripting attacks that can lead to spoofing, potentially compromising confidentiality and integrity of user data. The vulnerability has a CVSS 3.1 base score of 8.1, indicating high severity. Microsoft has released an official fix to address this issue.
Potential Impact
Successful exploitation can result in high impact on confidentiality and integrity by enabling spoofing attacks via cross-site scripting. Availability is not affected. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the security update for Microsoft Exchange Server 2016 Cumulative Update 23 as provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47631 to remediate this vulnerability.
CVE-2026-47631: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Microsoft Microsoft Exchange Server 2016 Cumulative Update 23
Description
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.
CVSS v3.1
Score 8.1high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-79) in Microsoft Exchange Server 2016 Cumulative Update 23 allows an attacker to inject malicious scripts due to improper input neutralization during web page generation. The flaw enables cross-site scripting attacks that can lead to spoofing, potentially compromising confidentiality and integrity of user data. The vulnerability has a CVSS 3.1 base score of 8.1, indicating high severity. Microsoft has released an official fix to address this issue.
Potential Impact
Successful exploitation can result in high impact on confidentiality and integrity by enabling spoofing attacks via cross-site scripting. Availability is not affected. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the security update for Microsoft Exchange Server 2016 Cumulative Update 23 as provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47631 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-05-19T20:12:27.069Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47631","vendor":"Microsoft"}]
Threat ID: 6a284cf08dd33fbd8566504f
Added to database: 06/09/2026, 17:27:12 UTC
Last enriched: 07/29/2026, 22:05:02 UTC
Last updated: 07/31/2026, 21:26:45 UTC
Views: 160
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