CVE-2017-11774KEV · OVERDUE

Microsoft Office Outlook Security Feature Bypass Vulnerability

High · published October 13, 2017

Patch now

Confirmed exploited, and the score agrees

CVSS calls it high at 7.8. It is confirmed in active exploitation. It sits in the 99.1th percentile for exploit probability.

1634
days past CISA
deadline
CVSS v3.1
7.8
EPSS
60%
Percentile
99.1
In the wild
Confirmed
What it is

⚡ A crafty security bypass lets attackers execute arbitrary commands through Outlook! 💥 Imagine a hotel with a receptionist who allows guests to enter any room just because they asked nicely. This vulnerability means that malicious actors can sneak in and gain access to sensitive areas without proper verification. If exploited, an attacker could run any command they choose, potentially leaking sensitive information or compromising entire systems. It's like leaving your front door wide open for intruders to waltz right in and throw a party with your data!

Put simply

Imagine a hotel with a receptionist who allows guests to enter any room just because they asked nicely. This vulnerability means that malicious actors can sneak in and gain access to sensitive areas without proper verification. This vulnerability arises from how Microsoft Outlook handles objects in memory, allowing unauthorized commands to be executed. Essentially, it means that Outlook fails to properly validate what it's being asked to do, making it a playground for attackers.

What to do

If exploited, an attacker could run any command they choose, potentially leaking sensitive information or compromising entire systems. It's like leaving your front door wide open for intruders to waltz right in and throw a party with your data! Update Microsoft Outlook to the latest version immediately, as patches have been issued to address this vulnerability. In the meantime, ensure that email filtering and anti-malware tools are active to reduce risk exposure. 🔥 You've got this! With these steps, you'll be fortifying your defenses in no time. 🛡️

The record
Technical detail
CVSS v3.1
7.8 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.59627 · 99.1th percentile
Published
2017-10-13T13:00Z
KEV added
2021-11-03 · due 2022-05-03
EPSS history
Timeline
  • 03 NOV 00:00Z
    Added to CISA KEV — remediate by May 3
    kev
  • 13 OCT 13:00Z
    Microsoft Outlook 2010 SP2, Outlook 2013 SP1 and RT SP1, and Outlook 2016 allow an attacker to execute arbitrary commands, due to how Microsoft Office handles…
    cvelistv5