PatchSiren

PatchSiren cyber security CVE debrief

CVE-2020-1027 Microsoft CVE debrief

CVE-2020-1027 is a Microsoft Windows kernel privilege escalation vulnerability that CISA added to its Known Exploited Vulnerabilities catalog. Because it is listed as known exploited, defenders should treat it as a high-priority patching item and apply Microsoft updates per vendor guidance.

Vendor
Microsoft
Product
Windows
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2022-05-23
Original CVE updated
2022-05-23
Advisory published
2022-05-23
Advisory updated
2022-05-23

Who should care

Windows administrators, endpoint security teams, vulnerability management teams, and incident responders responsible for Microsoft Windows systems.

Technical summary

The supplied sources identify CVE-2020-1027 as a Microsoft Windows Kernel Privilege Escalation Vulnerability. CISA’s KEV catalog marks it as known exploited and directs organizations to apply updates per vendor instructions. The provided corpus does not include affected versions, exploit mechanics, or a CVSS score, so those details should be confirmed in the official vendor and NVD records before scoping remediation.

Defensive priority

High. KEV inclusion means the issue is known to be exploited, so remediation should be prioritized over routine vulnerability queues. The CISA KEV entry lists a due date of 2022-06-13 for applying updates.

Recommended defensive actions

  • Apply Microsoft security updates according to vendor instructions for all affected Windows systems.
  • Use the CISA KEV entry to prioritize scanning and remediation for exposed Windows endpoints and servers.
  • Verify asset inventory to identify systems running vulnerable Windows builds, then confirm patch status.
  • Monitor for signs of privilege escalation or unusual local administrative activity on Windows hosts.
  • Recheck the official CVE and NVD records for any version-specific remediation details not included in the supplied corpus.

Evidence notes

This debrief is based only on the supplied CISA KEV source item and the official CVE/NVD links provided in the corpus. The KEV metadata states vendorProject Microsoft, product Windows, knownRansomwareCampaignUse Unknown, dateAdded 2022-05-23, dueDate 2022-06-13, and requiredAction 'Apply updates per vendor instructions.' The corpus does not provide a CVSS score, affected version list, or exploit description beyond the kernel privilege escalation classification.

Sources and references

Verified primary and authoritative sources

  • CVE-2020-1027 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2020-1027

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2020-1027 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2020-1027

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

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.