Threats / Microsoft / CVE-2020-1027
CVE-2020-1027
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Microsoft Windows vulnerability
Windows Kernel elevation of privilege vulnerability allowing arbitrary code execution with elevated permissions through improper memory object handling.
Verdict
Today item — known-exploited.
A kernel-level privilege escalation flaw in Windows that enables attackers to execute code with system-level permissions. Active exploitation in the wild demonstrates practical threat; CWE-787 buffer overflow indicates memory corruption as the attack vector.
01
Is it exploitable?
— the evidence, ranked above the scoreReported exploitation
3 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-05-23).
Probability (EPSS)
EPSS 0.04483 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: Microsoft, Windows. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-787 Out-of-bounds Write — weakness family: Memory safety.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I craft a malicious input that triggers improper memory object handling in the Windows Kernel.
Business
Attacker gains execution context within kernel space, bypassing user-mode security boundaries.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I execute arbitrary code with elevated system privileges on the compromised host.
Business
Complete system compromise enables installation of persistent malware, credential theft, and lateral movement across the network.
3
Lateral reach — past segmentation narrative 3
Attacker
I establish persistence and expand access to connected systems and sensitive data.
Business
Organizational infrastructure, intellectual property, and customer data face direct exposure to exfiltration and destruction.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05