Threats / Microsoft / CVE-2013-5065
CVE-2013-5065
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Microsoft Windows vulnerability
Microsoft Windows NDProxy.sys kernel driver contains an improper input validation flaw allowing local attackers to escalate privileges.
Verdict
Today item — known-exploited.
A local privilege escalation vulnerability in Windows kernel-mode driver NDProxy.sys due to insufficient input validation. Exploitation requires local system access but enables attacker code execution at kernel level.
01
Is it exploitable?
— the evidence, ranked above the scoreReported exploitation
7 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 2022-03-03).
Probability (EPSS)
EPSS 0.34893 — 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-20 Improper Input Validation.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 gain local user access to a Windows system through initial compromise or credential theft.
Business
User workstations and servers become entry points for privilege escalation attacks.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I craft malicious input to NDProxy.sys driver calls, bypassing validation checks in the kernel.
Business
Kernel-level code execution becomes possible without administrative credentials.
3
Lateral reach — past segmentation narrative 3
Attacker
I escalate my privileges from local user to SYSTEM level, gaining full control of the compromised machine.
Business
Attackers obtain unrestricted access to sensitive data, system configuration, and can persist malware installation.
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