CVE-2017-8759KEV · OVERDUE

Microsoft .NET Framework Remote Code Execution Vulnerability

High · published September 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 99.8th percentile for exploit probability.

1634
days past CISA
deadline
CVSS v3.1
7.8
EPSS
89%
Percentile
99.8
In the wild
Confirmed
What it is

🚨 A crafty attacker can remotely execute code just by tricking users into opening a malicious document! 🔥 It's an absolute game changer for .NET Framework versions 2.0 through 4.7. Think of it like a sneaky pizza delivery where the driver swaps your order with a hidden message bomb — once you open the box, chaos ensues! 🍕💥 If exploited, this vulnerability can lead to an attacker gaining full control over your system, allowing them to execute any command, steal sensitive data, or install malicious software. It’s like giving the keys to your house to a burglar who has all the time in the world to rummage through your belongings!

Put simply

Think of it like a sneaky pizza delivery where the driver swaps your order with a hidden message bomb — once you open the box, chaos ensues! 🍕💥 This Remote Code Execution vulnerability arises because the .NET Framework improperly handles objects in memory, allowing an attacker to send crafted input that executes arbitrary code on the victim's machine.

What to do

If exploited, this vulnerability can lead to an attacker gaining full control over your system, allowing them to execute any command, steal sensitive data, or install malicious software. It’s like giving the keys to your house to a burglar who has all the time in the world to rummage through your belongings! To guard against this threat, promptly update to the latest version of the .NET Framework. Additionally, ensure that your antivirus software is up-to-date and consider implementing stricter document handling policies. You've got this! Stay vigilant, patch up, and you'll keep your systems secure 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
0.88698 · 99.8th percentile
Published
2017-09-13T01:00Z
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 SEP 01:00Z
    Microsoft .NET Framework 2.0, 3.5, 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2 and 4.7 allow an attacker to execute code remotely via a malicious document or application…
    cvelistv5