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CVE-2023-33010

CRITICAL
Published 2023-05-24T00:00:00.000Z
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CVSS Score

V3.1
9.8
/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.072
probability
of exploitation in the wild

There is a 7.2% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.911
Higher than 91.1% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED

Impact Metrics

Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Description

A buffer overflow vulnerability in the ID processing function in Zyxel ATP series firmware versions 4.32 through 5.36 Patch 1, USG FLEX series firmware versions 4.50 through 5.36 Patch 1, USG FLEX 50(W) firmware versions 4.25 through 5.36 Patch 1, USG20(W)-VPN firmware versions 4.25 through 5.36 Patch 1, VPN series firmware versions 4.30 through 5.36 Patch 1, ZyWALL/USG series firmware versions 4.25 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.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

Zyxel

ATP series firmware

Affected Versions:

4.32 through 5.36 Patch 1
Zyxel

USG FLEX series firmware

Affected Versions:

4.50 through 5.36 Patch 1
Zyxel

USG FLEX 50(W) firmware

Affected Versions:

4.25 through 5.36 Patch 1
Zyxel

USG20(W)-VPN firmware

Affected Versions:

4.25 through 5.36 Patch 1
Zyxel

VPN series firmware

Affected Versions:

4.30 through 5.36 Patch 1
Zyxel

ZyWALL/USG series firmware

Affected Versions:

4.25 through 4.73 Patch 1

Known Exploited Vulnerability

This vulnerability is actively being exploited in the wild

View KEV Details

Remediation Status

Overdue

Due Date

June 26, 2023

Added to KEV

June 5, 2023

Required Action

Apply updates per vendor instructions.

Affected Product

Vendor/Project: Zyxel
Product: Multiple Firewalls

Ransomware Risk

Known Ransomware Use
KEV Catalog Version: 2025.01.24 Released: January 24, 2025

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed CRITICAL

GHSA-fqv9-84fh-jjgr

Advisory Details

A buffer overflow vulnerability in the ID processing function in Zyxel ATP series firmware versions 4.32 through 5.36 Patch 1, USG FLEX series firmware versions 4.50 through 5.36 Patch 1, USG FLEX 50(W) firmware versions 4.25 through 5.36 Patch 1, USG20(W)-VPN firmware versions 4.25 through 5.36 Patch 1, VPN series firmware versions 4.30 through 5.36 Patch 1, ZyWALL/USG series firmware versions 4.25 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 Scoring

CVSS Score

9.0

CVSS Vector

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

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2023-33010
WEB https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-buffer-overflow-vulnerabilities-of-firewalls

Advisory provided by GitHub Security Advisory Database. Published: May 24, 2023, Modified: April 4, 2024

References

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-buffer-overflow-vulnerabilities-of-firewalls
Published: 2023-05-24T00:00:00.000Z
Last Modified: 2025-02-04T18:34:26.582Z
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