CVE-2019-0604 Microsoft CVE debrief

Who should care

Organizations running Microsoft SharePoint, especially security teams, patch managers, and administrators responsible for business-critical or internet-facing deployments.

Technical summary

The supplied official records identify CVE-2019-0604 as a Microsoft SharePoint remote code execution vulnerability. CISA’s KEV entry classifies it as a known exploited vulnerability, notes known ransomware campaign use, and directs defenders to apply updates per vendor instructions.

Defensive priority

High. This is a CISA KEV-listed vulnerability with known ransomware campaign use, so remediation should be prioritized over routine patching.

Recommended defensive actions

• Apply Microsoft updates per vendor instructions as soon as possible.
• Confirm which SharePoint instances are affected, including any externally reachable deployments.
• Verify that patching was completed and that the affected systems are no longer exposed.
• Review security monitoring and incident response records for signs of exploitation on affected SharePoint systems.
• Use the CISA KEV due date as urgency context; CISA listed the item on 2021-11-03 with a due date of 2022-05-03.

Evidence notes

The corpus only supports the following facts: CVE-2019-0604 is a Microsoft SharePoint remote code execution vulnerability; CISA added it to the KEV catalog on 2021-11-03; CISA marks known ransomware campaign use as "Known"; and the required action is to apply updates per vendor instructions. No CVSS score is provided in the supplied corpus.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.