CVE-2019-0604

A remote code execution vulnerability exists in Microsoft SharePoint when the software fails to check the source markup of an application package, aka 'Microsoft SharePoint Remote Code Execution Vulnerability'. This CVE ID is unique from CVE-2019-0594.

First PoC 2020-01-21
2275 days →KEV 2026-04-14
186 days →First cited attacker 2026-10-17

Exploited in the wild: Yesadded 2021-11-03 · due 2022-05-03 · known ransomware use. An observation, not a forecast.
EPSS · 30-day forecast: 99.9%Chance of exploitation in the next 30 days, 100th percentile of all CVEs. A forecast; KEV outranks it.
CVSS · NVD · CRITICAL: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Internet exposure: not stated by sourcesNo exposure census on this CVE's dispatches.

Exploits

1 known · links only

Exploit-DB1

Microsoft SharePoint - Deserialization Remote Code Execution ↗
created 2020-01-21

On the wire

0 dispatches

No dispatch on our wire has named this CVE yet.

Tied by cited sources to

HomeLand Justice
1. “For HomeLand Justice , threat actors exploited CVE-2019-0604 in Microsoft SharePoint for initial access.”
  cited as used in a campaign · source: attack.mitre.org ↗ · 2026-10-17
2. “In their cyber attacks, HomeLand Justice group gained initial access to the victim's network by exploiting the Microsoft SharePoint CVE-2019-0604 vulnerability.”
  cited as exploiting · source: picussecurity.com ↗ · 2026-10-17
Void Manticore
1. “VOID MANTICORE has exploited public facing vulnerabilities within victim environments to include SharePoint CVE-2019-0604.”
  cited as exploiting · source: attack.mitre.org ↗ · 2026-10-17
APT27
1. “We believe the adversary exploited a recently patched vulnerability in Microsoft SharePoint tracked by CVE-2019-0604 , which is a remote code execution vulnerability used to compromise the server and eventually install a webshell.”
  cited as exploiting · named nearby · source: unit42.paloaltonetworks.com ↗ · 2026-10-17

Each actor is cited by the quoted source, linked under the quote. A citation is that source's claim, not our confirmation.

References

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Signals

Exploits

Exploit-DB1

On the wire

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