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Mentions the CVE; no further detail.
CVE-2019-0604 KEVRansomwarePublic exploit Critical · 9.8 EPSS 99.9%
Microsoft SharePoint Remote Code Execution Vulnerability
Microsoft · SharePoint
Summary
A remote code execution flaw in Microsoft SharePoint arises because the software fails to properly check the source markup of an application package. An attacker who can reach the affected SharePoint service over the network, without needing credentials or any user interaction, can exploit this to run code on the server.
Official description · NVD
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.
Priority scorePatchfirst’s 0 to 100 ranking. It adds points for CISA KEV listing, ransomware use, EPSS, threat reports, public exploit code and CVSS. Every CVE page shows the breakdown. Breakdown
88.8 / 100
- Exploited
- Yes, in CISA KEV
- Reports
- 4
- Tactics
- 5/15
How an attack unfolds
Based on MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. mappings. Select a step to see the evidence.How attackers get in
What they do
What can follow
Exploitation timelineDated milestones for a CVE: when it was disclosed, when exploit code became public, when exploitation was confirmed, and when threat reports named it.
First seen exploited 2 months after disclosure. Public exploit code (PoC-in-GitHub) appeared 18 days after disclosure.
- Disclosedday 0
- Public exploit codePoC-in-GitHub+18 days
- First seen exploitedVulnCheck KEV evidence+2 mo
- First dated threat reportmicrosoft.com+11 mo
- Added to CISA KEVknown ransomware use; EU database agrees+3 yrs
CISA KEV listing is when exploitation was confirmed, not necessarily the first attack.
MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. techniques
5 TechniqueOne specific attacker behaviour in MITRE ATT&CK, such as T1190 “Exploit Public-Facing Application”. IDs with a dot, like T1059.004, are sub-techniques., grouped by TacticThe attacker’s goal at a stage of an attack in MITRE ATT&CK, such as Initial Access or Persistence. Each technique belongs to one or more tactics. in kill-chain order, 1 cited passage 5Resource DevelopmentTA0042
Upload Malware T1608.001 Medium Confidence (technique links)How sure Patchfirst is that an ATT&CK technique applies to this CVE. High and medium links are shown by default; low ones come from early or generic mappings, text matching, or contradict the CVE’s details.
MITRE CTID mapping of the KEV entry · primary impact
CVE-2019-0604 is a vulnerability in an XML deserialization component within Microsoft SharePoint allowed remote attackers to typically install webshell malware to vulnerable hosts.
Initial AccessTA0001
Exploit Public-Facing Application T1190 Medium Confidence (technique links)How sure Patchfirst is that an ATT&CK technique applies to this CVE. High and medium links are shown by default; low ones come from early or generic mappings, text matching, or contradict the CVE’s details.
MITRE CTID mapping of the KEV entry · how it is exploited
Attackers linked to LookingFrog exploited Microsoft SharePoint servers in 2019 to gain code execution, probably by leveraging CVE-2019-0604.
PersistenceTA0003
Web Shell T1505.003 Medium Confidence (technique links)How sure Patchfirst is that an ATT&CK technique applies to this CVE. High and medium links are shown by default; low ones come from early or generic mappings, text matching, or contradict the CVE’s details.
MITRE CTID mapping of the KEV entry · primary impact
Credential AccessTA0006
OS Credential Dumping T1003 Medium Confidence (technique links)How sure Patchfirst is that an ATT&CK technique applies to this CVE. High and medium links are shown by default; low ones come from early or generic mappings, text matching, or contradict the CVE’s details.
MITRE CTID mapping of the KEV entry · follow-on activity
ExfiltrationTA0010
Exfiltration Over C2 Channel T1041 Medium Confidence (technique links)How sure Patchfirst is that an ATT&CK technique applies to this CVE. High and medium links are shown by default; low ones come from early or generic mappings, text matching, or contradict the CVE’s details.
MITRE CTID mapping of the KEV entry · primary impact
Lower-confidence links (1)
These come from early or generic mappings, text matching, or contradict this CVE’s details (for example a public-facing technique on a bug that needs a user to open a file). Shown for completeness.
- Application or System ExploitationT1499.004 CTID attack_to_cve Phase 1 "Uncategorized" mapping (not staged by impact)
Detection
0 rules for this CVE · 226 general rules for its techniquesRules for this CVE
0Sigma ruleAn open, vendor-neutral detection rule for log data. Security teams convert Sigma rules into searches for their own SIEM. that reference CVE-2019-0604 directly.CVE-specific rules are not available in this build. Search SigmaHQ ↗
General rules for this CVE’s techniques
These detect the technique in general, not this specific vulnerability.
Exploit Public-Facing ApplicationT1190149 general rules
- Arcadyan Router Exploitationscriticaltest
- Citrix ADS Exploitation CVE-2020-8193 CVE-2020-8195criticaltest
- Citrix Netscaler Attack CVE-2019-19781criticaltest
- Confluence Exploitation CVE-2019-3398criticaltest
- CVE-2010-5278 Exploitation Attemptcriticaltest
- CVE-2020-0688 Exchange Exploitation via Web Logcriticaltest
- CVE-2020-10148 SolarWinds Orion API Auth Bypasscriticaltest
- CVE-2020-5902 F5 BIG-IP Exploitation Attemptcriticaltest
Web ShellT1505.00335 general rules
- Certificate Request Export to Exchange Webservercriticaltest
- CVE-2021-40539 Zoho ManageEngine ADSelfService Plus Exploitcriticaltest
- Mailbox Export to Exchange Webservercriticaltest
- Oracle WebLogic Exploitcriticaltest
- Solarwinds SUPERNOVA Webshell Accesscriticaltest
- Webshell Remote Command Executioncriticaltest
- WordPress Wp2shell Webshell Plugin Accesscriticalexperimental
- Antivirus - Web Shell Detection Signaturehightest
Exfiltration Over C2 ChannelT10415 general rules
- Equation Group C2 Communicationhightest
- OpenCanary - TFTP Requesthightest
- Shai-Hulud NPM Package Malicious Exfiltration via Curlhighexperimental
- Network Communication Initiated To Portmap.IO Domainmediumtest
- Tunneling Tool Executionmediumtest
OS Credential DumpingT100337 general rules
- Antivirus - Password Dumper Signaturecriticalstable
- HackTool - Rubeus Executioncriticalstable
- Hacktool Execution - Imphashcriticaltest
- Potential Credential Dumping Via LSASS Process Clonecriticaltest
- WCE wceaux.dll Accesscriticaltest
- HackTool - Potential Remote Credential Dumping Activity Via CrackMapExec Or Impacket-Secretsdumphightest
- HackTool - Rubeus Execution - ScriptBlockhightest
- Hacktool Execution - PE Metadatahightest
Sigma rules © SigmaHQ, Detection Rule License 1.1; linked, not reproduced.
What security researchers reported
Named in 4 threat reports4 reportsMicrosoft2ESETFireEyeFeb 2020 – May 2022 · 2 undated
Reports are matched by finding the exact id CVE-2019-0604 in their text; nobody has reviewed the match. One passage is shown per report, at most 320 characters, linked to the original.
Ghost in the shell: Investigating web shell attacks
To implant web shells, adversaries take advantage of security gaps in internet-facing web servers, typically vulnerabilities in web applications, for example CVE-2019-0604 or CVE-2019-16759.
A lookback under the TA410 umbrella: Its cyberespionage TTPs and activity
Attackers linked to LookingFrog exploited Microsoft SharePoint servers in 2019 to gain code execution, probably by leveraging CVE-2019-0604.
UNC215: Spotlight on a Chinese Espionage Campaign in Israel
CVE-2019-0604 to install web shells and FOCUSFJORD payloads at targets…
2 passages name itOriginal (opens in a new tab) ↗
Also mentioned in 50 community threat pulses (AlienVault OTX)
Weaker evidencePulses are indicator collections that anyone can publish. A mention is not confirmation of exploitation.
- Actively_Exploited_Kev | Oct 29, 202628 Oct 2026
- Actively_Exploited_Kev | Oct 28, 202627 Oct 2026
- Actively_Exploited_Kev | Oct 27, 202626 Oct 2026
- Actively_Exploited_Kev | Oct 24, 202623 Oct 2026
- Actively_Exploited_Kev | Oct 23, 202622 Oct 2026
- Actively_Exploited_Kev | Oct 22, 202621 Oct 2026
- 44 more on OTX