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CVE-2023-5372

37
FAUCET Score

CVE-2023-5372 is a post-authentication command injection vulnerability impacting Zyxel NAS326 and NAS542 devices running specific firmware versions. An authenticated administrator can execute operating system commands by manipulating a URL query parameter on the web management interface. This vulnerability has a CVSS score of 7.2 (HIGH), indicating high impact on confidentiality, integrity, and availability, with low attack complexity and no user interaction required. While there is no evidence of active exploitation or public exploit code, community discussions suggest awareness of similar vulnerabilities in personal cloud storage devices.

Impacted Technologies

VendorProductVersion(s)CPE
< 5.21\(aazf.16\)c0CPE matchmatch criteria
cpe:2.3:o:zyxel:nas326_firmware:*:*:*:*:*:*:*:*
< 5.21\(abag.13\)c0CPE matchmatch criteria
cpe:2.3:o:zyxel:nas542_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.2HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.2
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
28.47%
Probability of exploitation in next 30 days
EPSS Percentile
97.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.2847 is in the 97th percentile among its peer group of 5,538 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.3 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

zyxel.com / global/en/support/security-advisories/zyxel-security-advisory-for-post-authentication-command-injection-vulnerability-in-nas-products-01-30-2024
Vendor Advisory