High 8.8Published Feb 23, 2026

CVE-2025-13943A 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 execut…

Updated under an hour ago (Oct 28, 2026, 1:30 PM ET)

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It affects Zyxel EX3301-T0 firmware and 52 other products. Add what you run to find out whether that includes you.

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Every CVE for Zyxel EX3301-T0 firmware

Exploited in the last 30 days

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: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-78
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Zyxel
NVD analysis: Analyzed
Record last updated: Feb 26, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Zyxel EX3301-T0 firmware zyxel:ex3301_t0_firmware (from the name)	through 5.50(ABVY.7)C0	CNA record
zyxel ex5601-t1_firmware zyxel:ex5601-t1_firmware	before 5.70\(acdz.5.1\)c0	NVD
zyxel ex7501-b0_firmware zyxel:ex7501-b0_firmware	before 5.18\(achn.3.1\)c0	NVD
zyxel ex7710-b0_firmware zyxel:ex7710-b0_firmware	before 5.18\(acak.1.6\)c0	NVD
zyxel gm4100-b0_firmware zyxel:gm4100-b0_firmware	before 5.18\(accl.2\)c0	NVD
zyxel pm7500-00_firmware zyxel:pm7500-00_firmware	before 5.61\(ackk.1.2\)c0	NVD
zyxel vmg3625-t50b_firmware zyxel:vmg3625-t50b_firmware	before 5.50\(abpm.9.7\)c0	NVD
zyxel vmg4005-b50a_firmware zyxel:vmg4005-b50a_firmware	before 5.17\(abqa.3.2\)c0	NVD
zyxel vmg4005-b60a_firmware zyxel:vmg4005-b60a_firmware	before 5.17\(abqa.3.2\)c0	NVD
zyxel ax7501-b1_firmware zyxel:ax7501-b1_firmware	before 5.17\(abpc.7.1\)c0	NVD
1–10 of 53

References

References

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-null-pointer-dereference-and-command-injection-vulnerabilities-in-certain-4g-lte-5g-nr-cpe-dsl-ethernet-cpe-fiber-onts-security-routers-and-wireless-extenders-02-24-2026	vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.