CVE-2017-8570

HIGH KEV

Microsoft Office - Remote Code Execution

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2017-8570 is actively exploited and listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added February 25, 2022. EIP tracks 11 public exploits from researchers including Rich Warren, rxwx, temesgeny.

AI-analyzed exploit summary This exploit leverages CVE-2017-8570 (Composite Moniker vulnerability) to drop an SCT file into the %TEMP% directory and execute it via Packager.dll. It generates a malicious RTF file for delivery.

Description

Microsoft Office allows a remote code execution vulnerability due to the way that it handles objects in memory, aka "Microsoft Office Remote Code Execution Vulnerability". This CVE ID is unique from CVE-2017-0243.

Exploits (11)

exploitdb WORKING POC
by Rich Warren · localwindows
https://www.exploit-db.com/exploits/44263

This exploit leverages CVE-2017-8570 (Composite Moniker vulnerability) to drop an SCT file into the %TEMP% directory and execute it via Packager.dll. It generates a malicious RTF file for delivery.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Microsoft Office (RTF parsing)
No auth needed
Prerequisites: Python environment · SCT payload file
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC 184 stars
by rxwx · client-side
https://github.com/rxwx/CVE-2017-8570

This repository contains a functional PoC exploit for CVE-2017-8570, leveraging the Packager.dll technique to drop an SCT file into the %TEMP% directory and execute it via a Composite Moniker vulnerability in Microsoft Office.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Microsoft Office (various versions)
No auth needed
Prerequisites: Victim opens a malicious RTF file · Microsoft Office installed
devstral-2 · analyzed Feb 16, 2026 Full analysis →
nomisec WORKING POC 67 stars
by temesgeny · client-side
https://github.com/temesgeny/ppsx-file-generator

This repository contains a Python tool that generates a malicious PowerPoint Slide Show (.ppsx) file exploiting CVE-2017-8570. The tool embeds a remote XML file containing a JScript payload that downloads and executes an arbitrary executable via PowerShell.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Microsoft Office PowerPoint (versions affected by CVE-2017-8570)
No auth needed
Prerequisites: A template .ppsx file with a specific icon · Access to a web server to host the XML and payload files · Victim interaction to open the malicious .ppsx file
devstral-2 · analyzed Feb 16, 2026 Full analysis →
nomisec WORKING POC 5 stars
by SwordSheath · client-side
https://github.com/SwordSheath/CVE-2017-8570

This repository contains a functional PoC for CVE-2017-8570, leveraging the Packager.dll trick to drop an SCT file into %TEMP% and execute it via a Composite Moniker vulnerability in Microsoft Office.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Microsoft Office (various versions)
No auth needed
Prerequisites: Victim must open a malicious RTF file · Microsoft Office installation vulnerable to CVE-2017-8570
devstral-2 · analyzed Feb 16, 2026 Full analysis →
nomisec WORKING POC 2 stars
by Drac0nids · poc
https://github.com/Drac0nids/CVE-2017-8570

This repository provides a proof-of-concept exploit for CVE-2017-8570, a remote code execution vulnerability in Microsoft Office. The exploit generates a malicious .ppsx file that, when opened, uses PowerShell to download and execute a payload, resulting in a Meterpreter session.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Microsoft Office (versions affected by CVE-2017-8570)
No auth needed
Prerequisites: Kali Linux or similar environment · Metasploit for payload handling · Network access to the target
devstral-2 · analyzed Feb 16, 2026 Full analysis →
nomisec WORKING POC 1 stars
by erfze · client-side
https://github.com/erfze/CVE-2017-8570

This is a Python-based exploit for CVE-2017-8570, which leverages a vulnerability in Microsoft Office's handling of OLE objects embedded in RTF files. The exploit generates a malicious RTF file that, when opened, executes arbitrary code via a crafted OLE package.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Microsoft Office (various versions, including patched versions of CVE-2017-0199)
No auth needed
Prerequisites: Victim must open the malicious RTF file · Python environment to generate the exploit file
devstral-2 · analyzed Feb 16, 2026 Full analysis →
nomisec WORKING POC
by sasqwatch · client-side
https://github.com/sasqwatch/CVE-2017-8570

This repository contains a functional PoC exploit for CVE-2017-8570, leveraging the Packager.dll technique to drop an SCT file into the %TEMP% directory and execute it via a Composite Moniker vulnerability in Microsoft Office.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Microsoft Office (various versions)
No auth needed
Prerequisites: Victim opens a malicious RTF file · Microsoft Office installed
devstral-2 · analyzed Feb 16, 2026 Full analysis →
nomisec WORKING POC
by MaxSecurity · client-side
https://github.com/MaxSecurity/Office-CVE-2017-8570

This repository contains a Python-based exploit toolkit for CVE-2017-8570, a Microsoft Office RCE vulnerability. It generates malicious PPSX files and can deliver payloads via SCT files or direct execution.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Microsoft Office (PPSX files)
No auth needed
Prerequisites: Python environment · Network access to target · Ability to host malicious files
devstral-2 · analyzed Feb 16, 2026 Full analysis →
patchapalooza WORKING POC
by The-Real-TechLord · local
https://gitlab.com/The-Real-TechLord/CVE-2017-8570

This repository contains a functional Python script that generates a malicious RTF file exploiting CVE-2017-8570 via the Packager.dll trick to drop and execute an SCT file in the %TEMP% directory. The exploit leverages the Composite Moniker vulnerability to bypass patches for CVE-2017-0199.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Microsoft Office (RTF parsing)
No auth needed
Prerequisites: Python environment · SCT file payload
devstral-2 · analyzed Feb 23, 2026 Full analysis →
patchapalooza WORKING POC
by hz9511 · poc
https://gitee.com/hz9511/CVE-2017-8570_ppt

This repository contains a functional Python script that exploits CVE-2017-8570, a Microsoft Office PPSX RCE vulnerability. The toolkit generates malicious PPSX files and delivers payloads (local or remote) via SCT files, supporting Metasploit integration.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Microsoft Office (PPSX files)
No auth needed
Prerequisites: Python 2.7.13 · Metasploit (optional for payload generation) · Network access to deliver payloads
devstral-2 · analyzed Feb 23, 2026 Full analysis →
patchapalooza WORKING POC
by hz9511 · poc
https://gitee.com/hz9511/CVE-2017-8570

This repository contains a functional Python script that generates a malicious RTF file exploiting CVE-2017-8570 via the Composite Moniker vulnerability. It uses the Packager.dll trick to drop an SCT file into the %TEMP% directory and execute it.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Microsoft Office (RTF parsing)
No auth needed
Prerequisites: Python environment · SCT file payload
devstral-2 · analyzed Feb 23, 2026 Full analysis →

References (6)

Core 6
Core References
Broken Link, Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/99445
Third Party Advisory x_refsource_misc
https://github.com/rxwx/CVE-2017-8570
Exploit, Third Party Advisory x_refsource_misc
https://github.com/tezukanice/Office8570

Scores

CVSS v3 7.8
EPSS 0.9422
EPSS Percentile 99.9%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation active
Automatable no
Technical Impact total

Details

CISA KEV 2022-02-25
VulnCheck KEV 2017-12-01
InTheWild.io 2021-06-24
ENISA EUVD EUVD-2017-17520
Status published
Products (5)
microsoft/office 2007 sp3
microsoft/office 2010 sp2
microsoft/office 2013 sp1 (2 CPE variants)
microsoft/office 2016 (2 CPE variants)
Microsoft Corporation/Microsoft Office 2007 SP3, Microsoft Office 2010 SP2, Microsoft Office 2013 SP1, and Microsoft Office 2016. Microsoft Office
Published Jul 11, 2017
KEV Added Feb 25, 2022
Tracked Since Feb 18, 2026