CVE-2017-11826VulnerabilityPublished 03/03/2022Updated 10/24/2026

CVE-2017-11826: Microsoft Office Remote Code Execution Vulnerability

Affects Microsoft OfficeSource CISA KEV

Severity

High

No CVSS score published yet

Exploitation: Actively exploited – in CISA KEV since 03/03/2022
KEV deadline: 03/24/2022
EPSS: 81.3% chance of exploitation in 30 days – higher than 99% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2017-11826 (opens in a new tab)

Description

CVE-2017-11826 is a remote code execution vulnerability in Microsoft Office that occurs due to improper handling of objects in memory. Successful exploitation allows an attacker to execute arbitrary code with the privileges of the current user. This vulnerability has been exploited in the wild.

Summary

This vulnerability in Microsoft Office arises from the software's failure to properly handle objects in memory, enabling remote attackers to execute arbitrary code in the context of the current user. The flaw is identified as CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer). It has been observed to be exploited in the wild, indicating active threat usage. No specific affected versions or patch information are provided in the available data.

Impact

Exploitation of this vulnerability allows remote attackers to run arbitrary code with the same privileges as the current user, potentially leading to full compromise of the affected system depending on user rights. The vulnerability has been actively exploited in the wild, increasing the risk to users of vulnerable Microsoft Office versions.

Mitigation

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is confirmed, users should exercise caution when opening untrusted Office documents and consider applying any available security updates from Microsoft.

Weaknesses

CWE-119Buffer Errors (Memory Bounds) (opens in a new tab)

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 10:26:51 UTC

Weaknesses

References

Related threats