CVE-2019-1089

Name: CVE-2019-1089
Creator: NVD / NIST
Published: 2019-07-15T19:15:18.343+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 4.91%

Last modified Jun 17, 2026

CVE-2019-1089 is a vulnerability of currently unknown severity. An elevation of privilege vulnerability exists in rpcss.dll when the RPC service Activation Kernel improperly handles an RPC request. To exploit this vulnerability, a low level authenticated attacker could run a specially crafted application. EPSS estimates a 4.91% chance of exploitation in the next 30 days.

Description

An elevation of privilege vulnerability exists in rpcss.dll when the RPC service Activation Kernel improperly handles an RPC request. To exploit this vulnerability, a low level authenticated attacker could run a specially crafted application. The security update addresses this vulnerability by correcting how rpcss.dll handles these requests., aka 'Windows RPCSS Elevation of Privilege Vulnerability'.

Metrics

EPSS Probability

4.91%

91.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions	Update
Microsoft	Windows 10	All versions	—
Microsoft	Windows 10	1607	—
Microsoft	Windows 10	1703	—
Microsoft	Windows 10	1709	—
Microsoft	Windows 10	1803	—
Microsoft	Windows 10	1809	—
Microsoft	Windows 10	1903	—
Microsoft	Windows 7	All versions	Sp1
Microsoft	Windows 8.1	All versions	—
Microsoft	Windows Rt 8.1	All versions	—
Microsoft	Windows Server 2008	All versions	Sp2
Microsoft	Windows Server 2008	r2	Sp1
Microsoft	Windows Server 2012	All versions	—
Microsoft	Windows Server 2012	r2	—
Microsoft	Windows Server 2016	All versions	—
Microsoft	Windows Server 2016	1803	—
Microsoft	Windows Server 2016	1903	—
Microsoft	Windows Server 2019	All versions	—

References

http://packetstormsecurity.com/files/153683/Microsoft-Windows-RPCSS-Activation-Kernel-Security-Callback-Privilege-Escalation.htmlThird Party Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1089Patch, Vendor Advisory
http://packetstormsecurity.com/files/153683/Microsoft-Windows-RPCSS-Activation-Kernel-Security-Callback-Privilege-Escalation.htmlThird Party Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1089Patch, Vendor Advisory

Timeline

Published: Jul 15, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-1089?

How severe is CVE-2019-1089?

Severity scoring for CVE-2019-1089 is pending analysis. The EPSS model estimates a 4.91% probability of exploitation in the next 30 days.

How do I fix CVE-2019-1089?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-1089?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST