Threats / Microsoft / CVE-2026-33825
CVE-2026-33825
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Microsoft Defender vulnerability
Microsoft Defender contains insufficient access control granularity, allowing authorized attackers to escalate privileges locally.
Verdict
Today item — known-exploited.
An authorized user with limited privileges can exploit insufficient access control mechanisms in Microsoft Defender to gain elevated system privileges. This vulnerability has been observed in active exploitation.
01
Is it exploitable?
— the evidence, ranked above the scoreExploit available
Public proof-of-concept exploit code is cataloged for this vulnerability.We link the existence of the exploit; we do not host or redistribute payloads.
Reported 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 2026-04-22).
Probability (EPSS)
EPSS 0.06216 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: Microsoft, Defender. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-1220 CWE-1220.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
WeaknessCWE-1220 · CWE-1220
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 authenticate to the system with standard user privileges.
Business
Legitimate user accounts remain a trusted entry point despite restricted permissions.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I identify and exploit coarse-grained access controls within Defender's privileged operations.
Business
Security software becomes a vector for privilege escalation rather than a protective boundary.
3
Lateral reach — past segmentation narrative 3
Attacker
I escalate my privileges to administrator or system level through the vulnerability.
Business
Attacker gains unrestricted control over the compromised endpoint and its data.
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