CVE-2021-43905

Microsoft Office app Remote Code Execution Vulnerability

Critical · published December 15, 2021

CVSS v3.1
9.6
EPSS
3%
Percentile
87.2
In the wild
Unconfirmed
What it is

🚨 One unchecked input is all it takes for an attacker to unleash chaos! The Microsoft Office app has a critical remote code execution vulnerability ready to be exploited. 🔥 Think of it like leaving a backdoor unlocked in a busy office. An intruder could stroll right in, access confidential files, and even tamper with sensitive data without anyone noticing. If exploited, this vulnerability could allow attackers to execute arbitrary code on the system, potentially compromising sensitive information, spreading malware, or taking control of critical functions. The consequences could be absolutely devastating, leaving users vulnerable to further attacks.

Put simply

Think of it like leaving a backdoor unlocked in a busy office. An intruder could stroll right in, access confidential files, and even tamper with sensitive data without anyone noticing. This CVE is a remote code execution vulnerability in Microsoft Office, where an attacker can craft a malicious document that, when opened, executes arbitrary code on the victim’s device due to a lack of proper input validation.

What to do

If exploited, this vulnerability could allow attackers to execute arbitrary code on the system, potentially compromising sensitive information, spreading malware, or taking control of critical functions. The consequences could be absolutely devastating, leaving users vulnerable to further attacks. Immediately apply the latest security updates provided by Microsoft for affected Office versions to patch this vulnerability. Make sure to also educate users not to open suspicious files from unknown sources. You’ve got this! Stay ahead of the game and secure your systems with these updates. 🛡️

The record
Technical detail
CVSS v3.1
9.6 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C
CVSS v4.0
Not supplied
EPSS
0.02982 · 87.2th percentile
Published
2021-12-15T14:15Z
EPSS history
Timeline
  • 15 DEC 14:15Z
    Microsoft Office app Remote Code Execution Vulnerability
    cvelistv5