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4.9
Zyxel VMG3625-T50B and WX3100-T0 routers: Denial of Service via Malicious Wake-on-LAN Request
CVE-2025-11848
Summary
An attacker with administrator privileges can crash the router by sending a specially crafted request, causing it to become unavailable. This affects the Wake-on-LAN feature in two specific router models. To protect your network, ensure you have the latest firmware update installed, and consider implementing additional security measures for your router.
What to do
No fix is available yet. Check with your software vendor for updates.
Affected software
| Vendor | Product | Affected versions | Fix available |
|---|---|---|---|
| zyxel | ee5301-00_firmware | <= 5.63\(acld.2.1\)c0 | – |
| zyxel | ee3301-00_firmware | <= 5.63\(acmu.2.1\)c0 | – |
| zyxel | dx5401-b1_firmware | <= 5.17\(abyo.7.1\)c0 | – |
| zyxel | dx4510-b1_firmware | <= 5.17\(abyl.10.1\)c0 | – |
| zyxel | dx4510-b0_firmware | <= 5.17\(abyl.10.1\)c0 | – |
| zyxel | dx3301-t0_firmware | <= 5.50\(abvy.7.1\)c0 | – |
| zyxel | dx3300-t1_firmware | <= 5.50\(abvy.7.1\)c0 | – |
| zyxel | dx3300-t0_firmware | <= 5.50\(abvy.7.1\)c0 | – |
| zyxel | ee6510-10_firmware | <= 5.19\(acjq.4.1\)c0 | – |
| zyxel | emg3525-t50b_firmware | <= 5.50\(abpm.9.7\)c0 | – |
| zyxel | emg5523-t50b_firmware | <= 5.50\(abpm.9.7\)c0 | – |
| zyxel | ex2210-t0_firmware | <= 5.50\(acdi.2.3\)c0 | – |
| zyxel | ex3300-t0_firmware | <= 5.50\(abvy.7.1\)c0 | – |
| zyxel | ex3300-t1_firmware | <= 5.50\(abvy.7.1\)c0 | – |
| zyxel | ex3301-t0_firmware | <= 5.50\(abvy.7.1\)c0 | – |
| zyxel | ex3500-t0_firmware | <= 5.44\(achr.5.1\)c0 | – |
| zyxel | ex3501-t0_firmware | <= 5.44\(achr.5.1\)c0 | – |
| zyxel | ex3510-b0_firmware | <= 5.17\(abup.15.2\)c0 | – |
| zyxel | ex3510-b1_firmware | <= 5.17\(abup.15.2\)c0 | – |
| zyxel | ex3600-t0_firmware | <= 5.70\(acif.2.1\)c0 | – |
| zyxel | ex5401-b1_firmware | <= 5.17\(abyo.7.1\)c0 | – |
| zyxel | ex5510-b0_firmware | <= 5.17\(abqx.11.1\)c0 | – |
| zyxel | ex5512-t0_firmware | <= 5.70\(aceg.5.3\)c0 | – |
| zyxel | ex5601-t0_firmware | <= 5.70\(acdz.5.1\)c0 | – |
| zyxel | ex5601-t1_firmware | <= 5.70\(acdz.5.1\)c0 | – |
| zyxel | ex7501-b0_firmware | <= 5.18\(achn.3.1\)c0 | – |
| zyxel | ex7710-b0_firmware | <= 5.18\(acak.1.6\)c0 | – |
| zyxel | gm4100-b0_firmware | <= 5.18\(accl.2\)c0 | – |
| zyxel | pm7500-00_firmware | <= 5.61\(ackk.1.2\)c0 | – |
| zyxel | vmg3625-t50b_firmware | <= 5.50\(abpm.9.7\)c0 | – |
| zyxel | vmg4005-b50a_firmware | <= 5.17\(abqa.3.2\)c0 | – |
| zyxel | vmg4005-b60a_firmware | <= 5.17\(abqa.3.2\)c0 | – |
| zyxel | ax7501-b1_firmware | <= 5.17\(abpc.7.1\)c0 | – |
| zyxel | pe3301-00_firmware | <= 5.63\(acmt.2.1\)c0 | – |
| zyxel | pe5301-01_firmware | <= 5.63\(acoj.2.1\)c0 | – |
| zyxel | pm3100-t0_firmware | <= 5.42\(acbf.4.1\)c0 | – |
| zyxel | pm5100-t0_firmware | <= 5.42\(acbf.4.1\)c0 | – |
| zyxel | pm5100-t1_firmware | <= 5.42\(acbf.4.1\)c0 | – |
| zyxel | pm7300-t0_firmware | <= 5.42\(abyy.4.1\)c0 | – |
| zyxel | px3321-t1_firmware | <= 5.44\(achk.3\)c0 | – |
| zyxel | px3321-t1_firmware | <= 5.44\(acjb.1.5\)c0 | – |
| zyxel | px5301-t0_firmware | <= 5.44\(ackb.0.6\)c0 | – |
| zyxel | scr_50axe_firmware | <= 1.30\(acgn.0\)c0 | – |
| zyxel | vmg8623-t50b_firmware | <= 5.50\(abpm.9.7\)c0 | – |
| zyxel | we3300-00_firmware | <= 5.70\(acka.1.1\)c0 | – |
| zyxel | wx3100-t0_firmware | <= 5.50\(abvl.4.9\)c0 | – |
| zyxel | wx3401-b1_firmware | <= 5.17\(abve.2.10\)c0 | – |
| zyxel | wx5600-t0_firmware | <= 5.70\(aceb.5.1\)c0 | – |
| zyxel | wx5610-b0_firmware | <= 5.18\(acgj.0.5\)c0 | – |
Original title
A null pointer dereference vulnerability in the Wake-on-LAN CGI program of the Zyxel VMG3625-T50B firmware version through 5.50(ABPM.9.6)C0 and the Zyxel WX3100-T0 firmware versions through 5.50(AB...
Original description
A null pointer dereference vulnerability in the Wake-on-LAN CGI program of the Zyxel VMG3625-T50B firmware version through 5.50(ABPM.9.6)C0 and the Zyxel WX3100-T0 firmware versions through 5.50(ABVL.4.8)C0 could allow an authenticated attacker with administrator privileges to trigger a denial-of-service (DoS) condition by sending a crafted HTTP request.
nvd CVSS3.1
4.9
Vulnerability type
CWE-476
NULL Pointer Dereference
Published: 24 Feb 2026 · Updated: 12 Mar 2026 · First seen: 6 Mar 2026