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Vulnerability record · CVE-2025-13943 · published 24 February 2026

CVE-2025-13943: Zyxel ex5601-t1 firmware os command injection vulnerability

Zyxel · Ex5601 T1 Firmware

A post-authentication command injection vulnerability in the log file download function of the Zyxel EX3301-T0 firmware versions through 5.50(ABVY.7)C0 could allow an authenticated attacker to execute operating system (OS) commands on an affected device.

8.8 CVSS 3.1 High EPSS 1.4% · top 28.2% CWE-78 · OS command injection
8.8CVSS 3.1 base score
1.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
52Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

Description

A post-authentication command injection vulnerability in the log file download function of the Zyxel EX3301-T0 firmware versions through 5.50(ABVY.7)C0 could allow an authenticated attacker to execute operating system (OS) commands on an affected device.

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

Affected products

52 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-null-pointer-dereference-and-com Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2025-8693Zyxel dm4200-b0 firmware os command injection vulnerabilityA post-authentication command injection vulnerability in the "priv" parameter of Zyxel DX3300-T0 firmware version 5.50(ABVY.6.3)C0 and earlier could …EPSS 1.1%7.5CVE-2025-6599Zyxel lte3301-plus firmware uncontrolled resource consumption vulnerabilityAn uncontrolled resource consumption vulnerability in the web server of Zyxel DX3301-T0 firmware version 5.50(ABVY.6.3)C0 and earlier could allow an …EPSS 0.31%7.5CVE-2024-8748Zyxel lte3301-plus firmware classic buffer overflow vulnerabilityA buffer overflow vulnerability in the packet parser of the third-party library "libclinkc" in Zyxel VMG8825-T50K firmware versions through V5.50(ABO…EPSS 0.52%7.5CVE-2024-5412Zyxel nebula lte3301-plus firmware classic buffer overflow vulnerabilityA buffer overflow vulnerability in the library "libclinkc" of the Zyxel VMG8825-T50K firmware version 5.50(ABOM.8)C0 could allow an unauthenticated a…EPSS 0.66%7.2CVE-2026-1460Zyxel nebula fwa70 firmware os command injection vulnerabilityA post-authentication command injection vulnerability in the “DomainName” parameter of the DHCP configuration file in Zyxel DX3301-T0 and EX3301-T0 f…EPSS 1.2%7.2CVE-2024-12009Zyxel dx3300-t0 firmware os command injection vulnerabilityA post-authentication command injection vulnerability in the "ZyEE" function of the Zyxel EX5601-T1 firmware version V5.70(ACDZ.3.6)C0 and earlier co…EPSS 1.1%7.2CVE-2024-12010Zyxel wx5610-b0 firmware os command injection vulnerabilityA post-authentication command injection vulnerability in the ”zyUtilMailSend” function of the Zyxel AX7501-B1 firmware version V5.17(ABPC.5.3)C0 and …EPSS 1.1%7.2CVE-2024-11253Zyxel emg5723-t50k firmware os command injection vulnerabilityA post-authentication command injection vulnerability in the "DNSServer” parameter of the diagnostic function in the Zyxel VMG8825-T50K firmware vers…EPSS 1.1%

Source: NIST National Vulnerability Database (record CVE-2025-13943), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.