CVE-2022-25440

Tenda AC9 v15.03.2.21 was discovered to contain a stack overflow via the ntpserver parameter in the SetSysTimeCfg function

published March 18, 2022

CVSS
—
EPSS
2%
Percentile
76.9
In the wild
Unconfirmed
What it is

⚠️ A seemingly harmless configuration option is hiding a stack overflow! The ntpserver parameter in Tenda AC9's SetSysTimeCfg function can overflow, leading to potential chaos. 🔥 Think of this like a restaurant that overfills a soup pot—too much and it spills everywhere! Similarly, this overflow could disrupt the router’s normal functioning and invite trouble. If an attacker exploits this vulnerability, they could manipulate the router’s settings, leading to unexpected behavior such as crashes or misrouting. While it hasn’t been exploited widely just yet, the risk of a determined attacker creating havoc is absolutely real.

Put simply

Think of this like a restaurant that overfills a soup pot—too much and it spills everywhere! Similarly, this overflow could disrupt the router’s normal functioning and invite trouble. This stack overflow occurs when the ntpserver parameter receives more data than it can handle during its configuration, which can lead to severe disruptions in system operations.

What to do

If an attacker exploits this vulnerability, they could manipulate the router’s settings, leading to unexpected behavior such as crashes or misrouting. While it hasn’t been exploited widely just yet, the risk of a determined attacker creating havoc is absolutely real. To safeguard against this, update your Tenda AC9 router to the latest firmware version to patch this overflow vulnerability. Regularly check for updates and consider limiting access to the router's administrative settings to trusted users only. You've got this! With a little diligence, you'll keep your network secure and humming along. 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01692 · 76.9th percentile
Published
2022-03-18T20:53Z
EPSS history
Timeline
  • 18 MAR 20:53Z
    Tenda AC9 v15.03.2.21 was discovered to contain a stack overflow via the ntpserver parameter in the SetSysTimeCfg function
    cvelistv5