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Dossier · Vulnerability

Actively exploited · CISA KEV

CVE-2026-56164

  1. KEV
  2. 92 days →First PoC

Signals

Exploited in the wild
Yesadded 2026-07-14 · due 2026-07-17. An observation, not a forecast.
EPSS · 30-day forecast
1%Chance of exploitation in the next 30 days, 63th percentile of all CVEs. A forecast; KEV outranks it.
CVSS · NVD
not stated by sourcesNo NVD record yet.
Internet exposure
not stated by sourcesNo exposure census on this CVE's dispatches.

Exploits

2 known · links only

GitHub PoCs · by trust, then stars2

  1. sentinel-aidefense/CVE-2026-56164-EXP ↗Trust ok 100

    CVE-2026-56164 EOP Exploit

    ★ 12 · created 2026-07-15

  2. sam00/POC-CVE-2026-56164-exploit ↗Trust ok 100

    CVE-2026-56164 is a critical missing-authentication vulnerability affecting on-premises Microsoft SharePoint Server. It allows unauthenticated, remote attackers to elevate privileges over a network.

    ★ 2 · created 2026-08-06

Fake proof-of-concept repositories have been used to deliver malware to the researchers who run them. The trust verdict is our engine's heuristic over the repository (account age, what it ships, how its stars arrived); it is a reason to read the code first, not a finding about its author.

On the wire

1 dispatch
  1. Rapid7 Analysis: Microsoft SharePoint JWT Token Authentication Bypass (CVE-2026-55040)KEV

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