CVE-2025-13942: Zyxel Ex3510-b0 Firmware command injection (CVSS 9.8)

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.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected products

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

Zyxel Nebula Nr7101 Firmware< 1.16\(accc.1\)v0

Zyxel Nr7101 Firmware< 1.00\(abuv.12\)b2

Zyxel Px3321-t1 Firmware< 5.44\(achk.3\)c0 · < 5.44\(acjb.1.5\)c0

Zyxel Px5301-t0 Firmware< 5.44\(ackb.0.6\)c0

Zyxel Vmg4927-b50a Firmware< 5.13\(ably.10.2\)c0

Zyxel Wx5610-b0 Firmware< 5.18\(acgj.0.5\)c0

Remediation

Fixed in

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

Patch & vendor advisories

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

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-02-24-2026Vendor Advisory

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Frequently asked

Is CVE-2025-13942 being actively exploited?

CVE-2025-13942 is not in the CISA KEV catalog. Its EPSS exploit probability is 1.08%.

How severe is CVE-2025-13942?

CVE-2025-13942 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 1.08% probability of exploitation.

Which products are affected by CVE-2025-13942?

Affected products include Zyxel Dx4510-b0 Firmware, Zyxel Dx4510-b1 Firmware, Zyxel Ee6510-10 Firmware, Zyxel Emg6726-b10a Firmware, Zyxel Ex2210-t0 Firmware, and 13 more.

How do I fix CVE-2025-13942?

Upgrade affected software to a fixed version, for example 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 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-13942 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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