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CVE-2023-22916

HIGH
Published 2023-04-24T00:00:00.000Z
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CVSS Score

V3.1
8.1
/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.005
probability
of exploitation in the wild

There is a 0.5% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.640
Higher than 64.0% of all CVEs

Attack Vector Metrics

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

Impact Metrics

Confidentiality
NONE
Integrity
HIGH
Availability
HIGH

Description

The configuration parser of Zyxel ATP series firmware versions 5.10 through 5.35, USG FLEX series firmware versions 5.00 through 5.35, USG FLEX 50(W) firmware versions 5.10 through 5.35, USG20(W)-VPN firmware versions 5.10 through 5.35, and VPN series firmware versions 5.00 through 5.35, which fails to properly sanitize user input. A remote unauthenticated attacker could leverage the vulnerability to modify device configuration data, resulting in DoS conditions on an affected device if the attacker could trick an authorized administrator to switch the management mode to the cloud mode.

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:

5.10 through 5.35
Zyxel

USG FLEX series firmware

Affected Versions:

5.00 through 5.35
Zyxel

USG FLEX 50(W) firmware

Affected Versions:

5.10 through 5.35
Zyxel

USG20(W)-VPN firmware

Affected Versions:

5.10 through 5.35
Zyxel

VPN series firmware

Affected Versions:

5.00 through 5.35

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed HIGH

GHSA-34w5-49cc-qp8r

Advisory Details

The configuration parser of Zyxel ATP series firmware versions 5.10 through 5.35, USG FLEX series firmware versions 5.00 through 5.35, USG FLEX 50(W) firmware versions 5.10 through 5.35, USG20(W)-VPN firmware versions 5.10 through 5.35, and VPN series firmware versions 5.00 through 5.35, which fails to properly sanitize user input. A remote unauthenticated attacker could leverage the vulnerability to modify device configuration data, resulting in DoS conditions on an affected device if the attacker could trick an authorized administrator to switch the management mode to the cloud mode.

CVSS Scoring

CVSS Score

7.5

CVSS Vector

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

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2023-22916
WEB https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-of-firewalls-and-aps

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

References

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-of-firewalls-and-aps
Published: 2023-04-24T00:00:00.000Z
Last Modified: 2025-02-12T16:42:02.320Z
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