CVE-2021-39509

An issue was discovered in D-Link DIR-816 DIR-816A2_FWv1.10CNB05_R1B011D88210 The HTTP request parameter is used in the handler function of…

published August 24, 2021

CVSS
—
EPSS
5%
Percentile
92.3
In the wild
Unconfirmed
What it is

⚠️ A sneaky route in your D-Link's firmware could lead to command injection! Imagine someone sneaking in through an open window instead of the front door. 🔥 Think of the vulnerability as a delivery person who can rewrite delivery instructions to send themselves anything they want. Just one misplaced character can pull off a master switch, giving them access to a whole range of commands. An attacker could exploit this vulnerability to execute arbitrary commands on your router, potentially taking control of your network. This could lead to data breaches, unauthorized access, or even turning your device into a part of a botnet. It's like leaving your front door wide open and inviting trouble in!

Put simply

Think of the vulnerability as a delivery person who can rewrite delivery instructions to send themselves anything they want. Just one misplaced character can pull off a master switch, giving them access to a whole range of commands. This vulnerability stems from improper handling of HTTP request parameters in the /goform/form2userconfig.cgi route, allowing for shell metacharacters to be injected, which can lead to command execution.

What to do

An attacker could exploit this vulnerability to execute arbitrary commands on your router, potentially taking control of your network. This could lead to data breaches, unauthorized access, or even turning your device into a part of a botnet. It's like leaving your front door wide open and inviting trouble in! To mitigate this, consider updating your firmware to the latest version provided by D-Link. Regularly review security settings and monitor for unauthorized access. Implementing strong network security practices can also help protect your devices. You've got this! Stay vigilant and secure your network like the superhero you are! 🦸🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.05098 · 92.3th percentile
Published
2021-08-24T18:52Z
EPSS history
Timeline
  • 24 AUG 18:52Z
    An issue was discovered in D-Link DIR-816 DIR-816A2_FWv1.10CNB05_R1B011D88210 The HTTP request parameter is used in the handler function of…
    cvelistv5