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Findings

Vulnerability · CVE-2021-27076

Microsoft SharePoint Server Remote Code Execution Vulnerability

Published Jun 24, 2026 · corrected/updated Jun 24, 2026 · Microsoft business_productivity_servers · evidence confidence very high

Microsoft SharePoint Server Remote Code Execution Vulnerability

Grounded briefings

Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.

Executive

CVE-2021-27076 is a unknown public vulnerability record for Microsoft business_productivity_servers. CISA lists it as known exploited. Published remediation guidance: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.

System administrator

Identify whether Microsoft business_productivity_servers is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: Microsoft business_productivity_servers. Published remediation guidance: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.

Security analyst

Signals on file: EPSS 15.2%. CISA lists it as known exploited. Sources contributing to this record: epss, vulncheck_kev. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.

Exploitation and remediation

  • Exploitation evidence

    Confirmed in CISA KEV since Jun 24, 2026. Listed in CISA KEV and VulnCheck KEV.

  • Patch and remediation

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

  • Safe detection guidance

    Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jun 24, 2026 · VulnCheck KEV

    Detected

    Microsoft SharePoint Server Remote Code Execution Vulnerability

  2. Jun 24, 2026 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Affected

  • vendor Microsoft business_productivity_serversversion unspecified

Sources

References