[NEW] [medium] Microsoft SharePoint and SharePoint Server: Vulnerability allows Cross-Site Scripting
A remote, authenticated attacker can exploit a vulnerability in Microsoft SharePoint and Microsoft SharePoint Server to carry out a Cross-Site Scripting attack.
CSIRTS triage
- What
- A vulnerability allows a remote, authenticated attacker to carry out a Cross-Site Scripting attack.
- Who is affected
- Deployments of Microsoft SharePoint and SharePoint Server.
- Urgency
- Remediation is medium due to the potential for exploitation by authenticated users.
- Action
- Apply the latest security updates for SharePoint and SharePoint Server.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2397
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-628260.33% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 26% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-62826 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
Recent advisories for Microsoft SharePoint and
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- criticalexploited2026-009: Critical Vulnerabilities in Microsoft SharePointcert-eu · 2026-07-23
- unknownexploitedMultiple vulnerabilities in Microsoft Sharepoint (July 22, 2026)cert-fr-alerte · 2026-07-22
- criticalexploitedCVE-2026-50522: Microsoft SharePoint Deserialization of Untrusted Data Vulnerabilitycisa-kev · 2026-07-22
- mediumCVE-2026-62826: Improper neutralization of input during web page generation ('cross-site scripting') in Micros…nvd · 2026-07-16
- criticalexploitedCVE-2026-58644: Microsoft SharePoint Deserialization of Untrusted Data Vulnerabilitycisa-kev · 2026-07-16
- criticalexploitedAL26-017 - Critical vulnerabilities impacting Microsoft SharePoint Server – CVE-2026-56164, CVE-2026-55040 and…cccs · 2026-07-15
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