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4.9
Zyxel Routers: Administrator Privilege Required to Crash Device
CVE-2025-11846
Summary
Some Zyxel routers can crash if an attacker with admin access sends a special request. This can be done by an authorized person with malicious intent, not by hacking into the router. To fix this, update the firmware to the latest version.
What to do
No fix is available yet. Check with your software vendor for updates.
Affected software
| Vendor | Product | Affected versions | Fix available |
|---|---|---|---|
| zyxel | lte3301-plus_firmware | <= 1.00\(abqu.9\)c0 | – |
| zyxel | nebula_fwa505_firmware | <= 1.60\(acko.2\)v0 | – |
| zyxel | nebula_fwa510_firmware | <= 1.60\(acgd.0\)c0 | – |
| zyxel | nebula_fwa515_firmware | <= 1.60\(acpz.0\)v0 | – |
| zyxel | nebula_fwa710_firmware | <= 1.60\(acgc.1\)v0 | – |
| 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 | nebula_lte3301-plus_firmware | <= 1.18\(acca.6\)v0 | – |
| 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 account settings CGI program of the Zyxel VMG3625-T50B firmware versions through 5.50(ABPM.9.6)C0 and the Zyxel WX3100-T0 firmware versions through 5...
Original description
A null pointer dereference vulnerability in the account settings CGI program of the Zyxel VMG3625-T50B firmware versions 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