CVE-2025-13942

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-02-24 · updated 2026-06-17
Weakness: CWE-78

Description

A command injection vulnerability in the UPnP function of the Zyxel EX3510-B0 firmware versions through 5.17(ABUP.15.1)C0 could allow a remote attacker to execute operating system (OS) commands on an affected device by sending specially crafted UPnP SOAP requests.

Affected products

Zyxel Dx4510-B0 Firmware: before 5.17\(abyl.10.1\)c0 — fixed in 5.17\(abyl.10.1\)c0
Zyxel Dx4510-B1 Firmware: before 5.17\(abyl.10.1\)c0 — fixed in 5.17\(abyl.10.1\)c0
Zyxel Ee6510-10 Firmware: before 5.19\(acjq.4.1\)c0 — fixed in 5.19\(acjq.4.1\)c0
Zyxel Emg6726-B10A Firmware: before 5.13\(abnp.8.2\)c1 — fixed in 5.13\(abnp.8.2\)c1
Zyxel Ex2210-T0 Firmware: before 5.50\(acdi.2.4\)c0 — fixed in 5.50\(acdi.2.4\)c0
Zyxel EX3510-B0 firmware: before 5.17\(abup.15.2\)c0 — fixed in 5.17\(abup.15.2\)c0
Zyxel Ex3510-B1 Firmware: before 5.17\(abup.15.2\)c0 — fixed in 5.17\(abup.15.2\)c0
Zyxel Ex5510-B0 Firmware: before 5.17\(abqx.11.1\)c0 — fixed in 5.17\(abqx.11.1\)c0
Zyxel Ex5512-T0 Firmware: before 5.70\(aceg.5.4\)c0 — fixed in 5.70\(aceg.5.4\)c0
Zyxel Ex7710-B0 Firmware: before 5.18\(acak.1.6\)c0 — fixed in 5.18\(acak.1.6\)c0
Zyxel Lte3301-Plus Firmware: before 1.00\(abqu.9\)c0 — fixed in 1.00\(abqu.9\)c0
Zyxel Nebula Lte3301-Plus Firmware: before 1.18\(acca.6\)v0 — fixed in 1.18\(acca.6\)v0
Zyxel Nebula Nr7101 Firmware: before 1.16\(accc.1\)v0 — fixed in 1.16\(accc.1\)v0
Zyxel NR7101 firmware: before 1.00\(abuv.12\)b2 — fixed in 1.00\(abuv.12\)b2
Zyxel Px3321-T1 Firmware: before 5.44\(acjb.1.5\)c0; before 5.44\(achk.3\)c0 — fixed in 5.44\(achk.3\)c0, 5.44\(acjb.1.5\)c0
Zyxel Px5301-T0 Firmware: before 5.44\(ackb.0.6\)c0 — fixed in 5.44\(ackb.0.6\)c0
Zyxel Vmg4927-B50A Firmware: before 5.13\(ably.10.2\)c0 — fixed in 5.13\(ably.10.2\)c0
Zyxel Wx5610-B0 Firmware: before 5.18\(acgj.0.5\)c0 — fixed in 5.18\(acgj.0.5\)c0

How to fix

Upgrade to a fixed version: Zyxel Dx4510-B0 Firmware 5.17\(abyl.10.1\)c0; Zyxel Dx4510-B1 Firmware 5.17\(abyl.10.1\)c0; Zyxel Ee6510-10 Firmware 5.19\(acjq.4.1\)c0; Zyxel Emg6726-B10A Firmware 5.13\(abnp.8.2\)c1; Zyxel Ex2210-T0 Firmware 5.50\(acdi.2.4\)c0; Zyxel EX3510-B0 firmware 5.17\(abup.15.2\)c0; Zyxel Ex3510-B1 Firmware 5.17\(abup.15.2\)c0; Zyxel Ex5510-B0 Firmware 5.17\(abqx.11.1\)c0; Zyxel Ex5512-T0 Firmware 5.70\(aceg.5.4\)c0; Zyxel Ex7710-B0 Firmware 5.18\(acak.1.6\)c0; Zyxel Lte3301-Plus Firmware 1.00\(abqu.9\)c0; Zyxel Nebula Lte3301-Plus Firmware 1.18\(acca.6\)v0. Check the vendor advisory for mitigations.

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

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