Monitor vulnerabilities like this one.
Sign up free to get alerted when software you use is affected.
4.9
Zyxel VMG3625-T50B and WX3100-T0 Firmware Denial-of-Service Risk
CVE-2025-11847
Summary
A specially crafted HTTP request can crash the IP settings program of these Zyxel routers, causing them to stop working temporarily. This requires an attacker to be logged in with administrative privileges. To stay secure, update your Zyxel 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 IP 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(A...
Original description
A null pointer dereference vulnerability in the IP 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