CVE-2026-0711

Severity: medium (CVSS 6.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-28 · updated 2026-07-25
Weakness: CWE-78

Description

A post-authentication command injection vulnerability in the EasyMesh-related APIs of Zyxel DX3300-T0 firmware versions through 5.50(ABVY.7.1)C0 could allow an authenticated, adjacent attacker with administrator privileges to execute OS commands on an affected device.

Affected products

Zyxel AX7501-B0 firmware: before 5.17\(abpc.7.2\)c0 — fixed in 5.17\(abpc.7.2\)c0
Zyxel AX7501-B1 firmware: before 5.17\(abpc.7.2\)c0 — fixed in 5.17\(abpc.7.2\)c0
Zyxel DX3300-T0 firmware: before 5.50\(abvy.7.2\)c0 — fixed in 5.50\(abvy.7.2\)c0
Zyxel DX3300-T1 firmware: before 5.50\(abvy.7.2\)c0 — fixed in 5.50\(abvy.7.2\)c0
Zyxel DX3301-T0 firmware: before 5.50\(abvy.7.2\)c0 — fixed in 5.50\(abvy.7.2\)c0
Zyxel DX5401-B0 firmware: before 5.17\(abyo.7.2\)c0 — fixed in 5.17\(abyo.7.2\)c0
Zyxel Dx5401-B1 Firmware: before 5.17\(abyo.7.2\)c0 — fixed in 5.17\(abyo.7.2\)c0
Zyxel Ee3301-00 Firmware: before 5.63\(acmu.3.1\)c0 — fixed in 5.63\(acmu.3.1\)c0
Zyxel Ee5301-00 Firmware: before 5.63\(acld.3.1\)c0 — fixed in 5.63\(acld.3.1\)c0
Zyxel Ee6510-10 Firmware: before 5.19\(acjq.4.2\)c0 — fixed in 5.19\(acjq.4.2\)c0
Zyxel Emg3525-T50B Firmware: before 5.50\(abpm.9.8\)c0 — fixed in 5.50\(abpm.9.8\)c0
Zyxel Emg5523-T50B Firmware: before 5.50\(abpm.9.8\)c0 — fixed in 5.50\(abpm.9.8\)c0
Zyxel Ex3300-T0 Firmware: before 5.50\(abvy.7.2\)c0 — fixed in 5.50\(abvy.7.2\)c0
Zyxel Ex3300-T1 Firmware: before 5.50\(abvy.7.2\)c0 — fixed in 5.50\(abvy.7.2\)c0
Zyxel EX3301-T0 firmware: before 5.50\(abvy.7.2\)c0 — fixed in 5.50\(abvy.7.2\)c0
Zyxel Ex3500-T0 Firmware: before 5.44\(achr.6\)c0 — fixed in 5.44\(achr.6\)c0
Zyxel EX3501-T0 firmware: before 5.44\(achr.6\)c0 — fixed in 5.44\(achr.6\)c0
Zyxel Ex3600-T0 Firmware: before 5.70\(acif.3\)c0 — fixed in 5.70\(acif.3\)c0
Zyxel Ex5401-B0 Firmware: before 5.17\(abyo.7.2\)c0 — fixed in 5.17\(abyo.7.2\)c0
Zyxel Ex5401-B1 Firmware: before 5.17\(abyo.7.2\)c0 — fixed in 5.17\(abyo.7.2\)c0
Zyxel Ex5512-T0 Firmware: before 5.70\(aceg.5.5\)c0 — fixed in 5.70\(aceg.5.5\)c0
Zyxel Ex5601-T0 Firmware: before 5.70\(acdz.6\)c0 — fixed in 5.70\(acdz.6\)c0
Zyxel EX5601-T1 firmware: before 5.70\(acdz.6\)c0 — fixed in 5.70\(acdz.6\)c0
Zyxel Ex7501-B0 Firmware: before 5.18\(achn.3.2\)c0 — fixed in 5.18\(achn.3.2\)c0
Zyxel Nebula Fwa515 Firmware: before 1.60\(acpz.0\)v0 — fixed in 1.60\(acpz.0\)v0
Zyxel Nr5307 Firmware: before 2.00\(acjt.3\)c0 — fixed in 2.00\(acjt.3\)c0
Zyxel Pe3301-00 Firmware: before 5.63\(acmt.3.1\)c0 — fixed in 5.63\(acmt.3.1\)c0
Zyxel Pe5301-01 Firmware: before 5.63\(acoj.3.1\)c0 — fixed in 5.63\(acoj.3.1\)c0
Zyxel Px5301-T0 Firmware: before 5.44\(ackb.0.7\)c0 — fixed in 5.44\(ackb.0.7\)c0
Zyxel Px5302-00 Firmware: before 5.44\(acnm.0.1\)c0 — fixed in 5.44\(acnm.0.1\)c0

How to fix

Upgrade to a fixed version: Zyxel AX7501-B0 firmware 5.17\(abpc.7.2\)c0; Zyxel AX7501-B1 firmware 5.17\(abpc.7.2\)c0; Zyxel DX3300-T0 firmware 5.50\(abvy.7.2\)c0; Zyxel DX3300-T1 firmware 5.50\(abvy.7.2\)c0; Zyxel DX3301-T0 firmware 5.50\(abvy.7.2\)c0; Zyxel DX5401-B0 firmware 5.17\(abyo.7.2\)c0; Zyxel Dx5401-B1 Firmware 5.17\(abyo.7.2\)c0; Zyxel Ee3301-00 Firmware 5.63\(acmu.3.1\)c0; Zyxel Ee5301-00 Firmware 5.63\(acld.3.1\)c0; Zyxel Ee6510-10 Firmware 5.19\(acjq.4.2\)c0; Zyxel Emg3525-T50B Firmware 5.50\(abpm.9.8\)c0; Zyxel Emg5523-T50B Firmware 5.50\(abpm.9.8\)c0. Check the vendor advisory for mitigations.

References

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-command-injection-vulnerabilities-in-certain-4g-lte-5g-nr-cpe-dsl-ethernet-cpe-fiber-onts-and-wireless-extenders-04-28-2026

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