CVE-2026-45454: Microsoft SharePoint Remote Code Execution Vulnerability
Improper limitation of a pathname to a restricted directory ('path traversal') in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
CSIRTS triage
- What
- Improper limitation of a pathname allows an authorized attacker to execute code.
- Who is affected
- Authorized users of Microsoft Office SharePoint are affected.
- Urgency
- Remediation is urgent due to the potential for remote code execution.
- Action
- Apply the latest security patch for Microsoft SharePoint.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45454
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.
- Moderate exploitation riskCVE-2026-454541.6% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 74% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-45454 | coverage & exploitation status | NVD · CVE.org |
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