CVE-2026-56155
Act now ● On CISA KEV — actively exploited
Actively exploited — on the CISA KEV list.
CVSS base
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EPSS — probability of exploitation (30 days)
0.3%
28.2th percentile
CISA KEV
Listed
Added 2026-07-14 · patch by 2026-07-28
Weakness / dates
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Published — · modified —
Timeline
- 2026-07-14 — Added to CISA KEV (actively exploited)
- 2026-07-28 — CISA patch-by deadline
Description
Microsoft Active Directory Federation Services contains an insufficient granularity of access control vulnerability that allows an authorized attacker to elevate privileges locally.