CVE-2019-1089 EXPLOIT
7.8
HIGH · CVSS 3.0 · EPSS 4.9% (pctl 92)
Patch early
A public exploit exists.
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'.
Scoring
| CVSS | 7.8 (HIGH, v3.0) |
|---|---|
| Vector | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 4.91% — more likely to be exploited than 92% of all CVEs |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2019-07-15 |
| Last modified | 2026-06-17 |
Affected (8)
| Vendor | Product |
|---|---|
| microsoft | windows 10 |
| microsoft | windows 7 |
| microsoft | windows 8.1 |
| microsoft | windows rt 8.1 |
| microsoft | windows server 2008 |
| microsoft | windows server 2012 |
| microsoft | windows server 2016 |
| microsoft | windows server 2019 |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | Microsoft Windows 10 1903/1809 - RPCSS Activation Kernel Security Callback Privilege Escalation | 2019-07-18 |
References
- http://packetstormsecurity.com/files/153683/Microsoft-Windows-RPCSS-Activation-Kernel-Security-Callback-Privilege-Escalation.html
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1089
- http://packetstormsecurity.com/files/153683/Microsoft-Windows-RPCSS-Activation-Kernel-Security-Callback-Privilege-Escalation.html
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1089
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