Threats / Microsoft / CVE-2026-56155
CVE-2026-56155
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-07-15
Microsoft Active Directory Federation Services vulnerability
Microsoft Active Directory Federation Services contains an insufficient granularity of access control vulnerability that allows an authorized attacker to elevate privileges locally.
Verdict
Today item — known-exploited.
Confirmed exploited in the wild (CISA KEV). Prioritize remediation now and verify exposure.
CISA KEV Yes · 2026-07-143
01
Is it exploitable?
— the evidence, ranked above the scoreReported exploitation
4 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 2026-07-14).
Severity / affected
Affected: Microsoft, Active Directory Federation Services. 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 boardAttacker/business narrative framing is pending triage for this record — see Coverage & confidence below. Facts and verdict above are derived deterministically from the public feed.
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