CVE-2021-20776

Improper authentication vulnerability in SCT-40CM01SR and AT-40CM01SR allows an attacker to bypass access restriction and execute an arbitrary command via…

published July 7, 2021

CVSS
—
EPSS
1%
Percentile
70.0
In the wild
Unconfirmed
What it is

⚠️ An improper authentication flaw in SCT-40CM01SR and AT-40CM01SR lets attackers sidestep access controls and send arbitrary commands through telnet — that's like giving someone a spare key to your server without checking their ID! Imagine a hotel that hands out room keys without verifying guests' identities — that’s what this vulnerability does for your device. An attacker could simply walk in and issue commands as if they're part of the staff! If exploited, an attacker could gain unauthorized control over the device, potentially leading to significant disruptions or even full system compromise. This could enable them to alter configurations, extract sensitive data, or wreak havoc on your network!

Put simply

Imagine a hotel that hands out room keys without verifying guests' identities — that’s what this vulnerability does for your device. An attacker could simply walk in and issue commands as if they're part of the staff! This vulnerability allows attackers to bypass access restrictions due to improper authentication, enabling command execution via telnet without proper verification. This lack of checks means anyone with network access could manipulate the device as they please.

What to do

If exploited, an attacker could gain unauthorized control over the device, potentially leading to significant disruptions or even full system compromise. This could enable them to alter configurations, extract sensitive data, or wreak havoc on your network! To mitigate this vulnerability, ensure that the devices are secured with strong authentication measures, disable telnet where possible, and consider applying firmware updates if available. Regularly audit device security configurations to prevent unauthorized access. You’ve got this! Taking these steps will significantly improve your security posture! 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01290 · 70.0th percentile
Published
2021-07-07T07:05Z
EPSS history
Timeline
  • 07 JUL 07:05Z
    Improper authentication vulnerability in SCT-40CM01SR and AT-40CM01SR allows an attacker to bypass access restriction and execute an arbitrary command via…
    cvelistv5