Microsoft SharePoint Server up to 16.0.20326.20094 cross site scripting

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.0$0-$5k0.37

Summaryinfo

A vulnerability labeled as problematic has been found in Microsoft SharePoint Server. This vulnerability affects unknown code. Executing a manipulation can lead to cross site scripting. This vulnerability is handled as CVE-2026-102864. The attack can be executed remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in Microsoft SharePoint Server and classified as problematic. This vulnerability affects an unknown part. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. CVE summarizes:

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

The advisory is shared for download at msrc.microsoft.com. This vulnerability was named CVE-2026-102864 since 09/29/2026. The exploitation appears to be easy. The attack can be initiated remotely. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/14/2026). The MITRE ATT&CK project declares the attack technique as T1059.007.

Upgrading to version 16.0.20326.20190 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-99047). Once again VulDB remains the best source for vulnerability data.

Productinfo

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Vendor

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 4.0

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 4.6
CNA Vector (microsoft): 🔒

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: SharePoint Server 16.0.20326.20190

Timelineinfo

09/29/2026 CVE reserved
10/13/2026 +14 days Advisory disclosed
10/13/2026 +0 days VulDB entry created
10/14/2026 +1 days VulDB entry last update

Sourcesinfo

Vendor: microsoft.com

Advisory: msrc.microsoft.com
Status: Confirmed

CVE: CVE-2026-102864 (🔒)
GCVE (CVE): GCVE-0-2026-102864
GCVE (VulDB): GCVE-100-418036
EUVD: 🔒

Entryinfo

Created: 10/13/2026 21:54
Updated: 10/14/2026 03:37
Changes: 10/13/2026 21:54 (27), 10/13/2026 21:55 (36), 10/14/2026 03:37 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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