How serious is CVE-2023-33009?

This vulnerability has a CVSS score of 9.8 out of 10, classified as CRITICAL severity. Proof-of-concept exploit code is publicly available, making this an active threat.

Is there exploit code available for CVE-2023-33009?

Yes, proof-of-concept exploit code for CVE-2023-33009 is publicly available on GitHub and security research platforms. This increases the risk of active exploitation.

Which products are affected by CVE-2023-33009?

CVE-2023-33009 affects zyxel atp100 firmware. Check the full CVE details for specific version information.

How do I fix CVE-2023-33009?

To remediate CVE-2023-33009, check for security patches from zyxel. Apply all available updates and security patches. If no patch is available, implement recommended workarounds or security controls to mitigate the risk.

CVE-2023-33009

Critical

|9.8

Exploit Available

Plain English Summary

AI-powered analysis for quick understanding

An attacker can exploit a critical vulnerability in certain Zyxel device firmware to crash the device or potentially take control of it remotely, without needing to log in. This affects multiple firmware versions, so if your device is running one of these versions, it’s crucial to update it immediately to protect against this risk.

Technical Description

A buffer overflow vulnerability in the notification function in Zyxel ATP series firmware versions 4.60 through 5.36 Patch 1, USG FLEX series firmware versions 4.60 through 5.36 Patch 1, USG FLEX 50(W) firmware versions 4.60 through 5.36 Patch 1, USG20(W)-VPN firmware versions 4.60 through 5.36 Patch 1, VPN series firmware versions 4.60 through 5.36 Patch 1, ZyWALL/USG series firmware versions 4.60 through 4.73 Patch 1, could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and even a remote code execution on an affected device.

CVSS Vector Analysis

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

Confidentiality ImpactHigh

Integrity ImpactHigh

Availability ImpactHigh

ScopeUnchanged

Vector String

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Resources

Search for proof-of-concept code and exploit modules

GitHub Search Exploit-DB Nuclei Templates Metasploit Vulners

Official References

NIST NVD

Est. Bounty

$13,000($5K-$15K)

Vendor Response

Grade FPatched in 1009 days

Quick Information

Published

May 24, 2023

almost 3 years ago

Last Modified

Feb 26, 2026

about 1 month ago

Vendor

zyxel

Product

atp100 firmware