CVE-2019-0555
An elevation of privilege vulnerability exists in the Microsoft XmlDocument class that could allow an attacker to escape from the AppContainer sandbox in the browser, aka "Microsoft XmlDocument Elevation of Privilege Vulnerability." This affects Windows…
Does this matter?
A public exploit is published in Exploit-DB (verified) and the impact is high, while EPSS rates exploitation at 2.7%. Anyone can run this; patch or mitigate before the next change window and check exposed instances for signs of use.
Description
An elevation of privilege vulnerability exists in the Microsoft XmlDocument class that could allow an attacker to escape from the AppContainer sandbox in the browser, aka "Microsoft XmlDocument Elevation of Privilege Vulnerability." This affects Windows Server 2012 R2, Windows RT 8.1, Windows Server 2012, Windows Server 2019, Windows Server 2016, Windows 8.1, Windows 10, Windows 10 Servers.
- CVSS 3.0
- 7.8 HIGHCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 2.67% probability · 86th percentile
- Public exploits
- 1 in Exploit-DB · verified · first 16 January 2019
- CISA KEV
- Not listed
- Weakness
- CWE-862
- Affected
- microsoft/windows 10 · microsoft/windows 8.1 · microsoft/windows rt 8.1 · microsoft/windows server 2012 · microsoft/windows server 2016 · microsoft/windows server 2019
- Source
- secure@microsoft.com
EPSS moved from 3.7% on 21 September 2026 to 2.7% on 27 October 2026.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://www.securityfocus.com/bid/106395Third Party Advisory, VDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0555Patch, Vendor Advisory
- https://www.exploit-db.com/exploits/46185/Exploit, Third Party Advisory, VDB Entry
- http://www.securityfocus.com/bid/106395Third Party Advisory, VDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0555Patch, Vendor Advisory
- https://www.exploit-db.com/exploits/46185/Exploit, Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.