CVE-2021-38389CWE-121

Advantech WebAccess

Critical · published October 18, 2021

CVSS v3.1
9.8
EPSS
10%
Percentile
95.7
In the wild
Unconfirmed
What it is

🚨 We’ve got a critical stack-based buffer overflow in Advantech WebAccess versions 9.02 and earlier, with an alarming CVSS score of 9.8! Think of this vulnerability as a crowded elevator with too many people trying to squeeze in. When the limit is exceeded, it can lead to a messy overflow situation, causing chaos inside! An attacker could exploit this vulnerability to execute arbitrary code remotely, essentially hijacking the system. This could lead to unauthorized data access, complete system compromise, or even control over critical infrastructure. This situation is absolutely devastating and puts your operations at serious risk!

Put simply

Think of this vulnerability as a crowded elevator with too many people trying to squeeze in. When the limit is exceeded, it can lead to a messy overflow situation, causing chaos inside! CVE-2021-38389 involves a stack-based buffer overflow in Advantech WebAccess that allows attackers to send specially crafted input, which overflows the buffer and executes malicious code.

What to do

An attacker could exploit this vulnerability to execute arbitrary code remotely, essentially hijacking the system. This could lead to unauthorized data access, complete system compromise, or even control over critical infrastructure. This situation is absolutely devastating and puts your operations at serious risk! To safeguard your systems, patch Advantech WebAccess to version 9.03 or later immediately. Additionally, review your network security configurations to limit exposure and ensure proper access controls are in place. You've got this! Secure your systems and enjoy peace of mind! 🛡️

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.10367 · 95.7th percentile
Weakness
CWE-121 · Stack-based Buffer Overflow
Published
2021-10-18T12:41Z
EPSS history
Timeline
  • 18 OCT 12:41Z
    Advantech WebAccess
    cvelistv5