CVE-2017-11826
Published: March 3, 2022
Official Description
A remote code execution vulnerability exists in Microsoft Office software when the software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user.
CISA KEV Advisory
Microsoft Office Remote Code Execution Vulnerability
A remote code execution vulnerability exists in Microsoft Office software when the software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user.
Apply updates per vendor instructions.
Risk Analysis
This vulnerability in Microsoft Office software allows remote code execution when it fails to properly handle objects in memory. An attacker could run arbitrary code in the context of the current user. Its high EPSS score of 0.90484 indicates a very high likelihood of exploitation, making it an urgent concern. The fact that it is in CISA's KEV catalog confirms it has been actively exploited.
This vulnerability is being actively exploited in the wild and is listed in CISA's KEV catalog, indicating confirmed real-world exploitation. It is remotely exploitable.
Apply the latest security updates and patches for Microsoft Office to address this remote code execution vulnerability. Ensure all Office installations are kept up-to-date.
Technical Analysis
CVE-2017-11826 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2017-11826 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Affected Vendors & Products
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2017-11826 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1