CVE-2025-11847
Received
Received - Intake
Null Pointer Dereference in Zyxel Firmware Causes DoS
Publication date: 2026-02-24
Last updated on: 2026-02-25
Assigner: Zyxel Corporation
Description
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.
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| zyxel | lte3301-plus_firmware | to 1.00(abqu.9 (exc) |
| zyxel | nebula_fwa505_firmware | to 1.60(acko.2 (exc) |
| zyxel | nebula_fwa510_firmware | to 1.60(acgd.0 (exc) |
| zyxel | nebula_fwa515_firmware | to 1.60(acpz.0 (exc) |
| zyxel | nebula_fwa710_firmware | to 1.60(acgc.1 (exc) |
| zyxel | ee5301-00_firmware | to 5.63(acld.2.1 (exc) |
| zyxel | ee3301-00_firmware | to 5.63(acmu.2.1 (exc) |
| zyxel | dx5401-b1_firmware | to 5.17(abyo.7.1 (exc) |
| zyxel | dx4510-b1_firmware | to 5.17(abyl.10.1 (exc) |
| zyxel | dx4510-b0_firmware | to 5.17(abyl.10.1 (exc) |
| zyxel | dx3301-t0_firmware | to 5.50(abvy.7.1 (exc) |
| zyxel | dx3300-t1_firmware | to 5.50(abvy.7.1 (exc) |
| zyxel | dx3300-t0_firmware | to 5.50(abvy.7.1 (exc) |
| zyxel | ee6510-10_firmware | to 5.19(acjq.4.1 (exc) |
| zyxel | emg3525-t50b_firmware | to 5.50(abpm.9.7 (exc) |
| zyxel | nebula_lte3301-plus_firmware | to 1.18(acca.6 (exc) |
| zyxel | emg5523-t50b_firmware | to 5.50(abpm.9.7 (exc) |
| zyxel | ex2210-t0_firmware | to 5.50(acdi.2.3 (exc) |
| zyxel | ex3300-t0_firmware | to 5.50(abvy.7.1 (exc) |
| zyxel | ex3300-t1_firmware | to 5.50(abvy.7.1 (exc) |
| zyxel | ex3301-t0_firmware | to 5.50(abvy.7.1 (exc) |
| zyxel | ex3500-t0_firmware | to 5.44(achr.5.1 (exc) |
| zyxel | ex3501-t0_firmware | to 5.44(achr.5.1 (exc) |
| zyxel | ex3510-b0_firmware | to 5.17(abup.15.2 (exc) |
| zyxel | ex3510-b1_firmware | to 5.17(abup.15.2 (exc) |
| zyxel | ex3600-t0_firmware | to 5.70(acif.2.1 (exc) |
| zyxel | ex5401-b1_firmware | to 5.17(abyo.7.1 (exc) |
| zyxel | ex5510-b0_firmware | to 5.17(abqx.11.1 (exc) |
| zyxel | ex5512-t0_firmware | to 5.70(aceg.5.3 (exc) |
| zyxel | ex5601-t0_firmware | to 5.70(acdz.5.1 (exc) |
| zyxel | ex5601-t1_firmware | to 5.70(acdz.5.1 (exc) |
| zyxel | ex7501-b0_firmware | to 5.18(achn.3.1 (exc) |
| zyxel | ex7710-b0_firmware | to 5.18(acak.1.6 (exc) |
| zyxel | gm4100-b0_firmware | to 5.18(accl.2 (exc) |
| zyxel | pm7500-00_firmware | to 5.61(ackk.1.2 (exc) |
| zyxel | vmg3625-t50b_firmware | to 5.50(abpm.9.7 (exc) |
| zyxel | vmg4005-b50a_firmware | to 5.17(abqa.3.2 (exc) |
| zyxel | vmg4005-b60a_firmware | to 5.17(abqa.3.2 (exc) |
| zyxel | ax7501-b1_firmware | to 5.17(abpc.7.1 (exc) |
| zyxel | pe3301-00_firmware | to 5.63(acmt.2.1 (exc) |
| zyxel | pe5301-01_firmware | to 5.63(acoj.2.1 (exc) |
| zyxel | pm3100-t0_firmware | to 5.42(acbf.4.1 (exc) |
| zyxel | pm5100-t0_firmware | to 5.42(acbf.4.1 (exc) |
| zyxel | pm5100-t1_firmware | to 5.42(acbf.4.1 (exc) |
| zyxel | pm7300-t0_firmware | to 5.42(abyy.4.1 (exc) |
| zyxel | px3321-t1_firmware | to 5.44(achk.3 (exc) |
| zyxel | px3321-t1_firmware | to 5.44(acjb.1.5 (exc) |
| zyxel | px5301-t0_firmware | to 5.44(ackb.0.6 (exc) |
| zyxel | scr_50axe_firmware | to 1.30(acgn.0 (exc) |
| zyxel | vmg8623-t50b_firmware | to 5.50(abpm.9.7 (exc) |
| zyxel | we3300-00_firmware | to 5.70(acka.1.1 (exc) |
| zyxel | wx3100-t0_firmware | to 5.50(abvl.4.9 (exc) |
| zyxel | wx3401-b1_firmware | to 5.17(abve.2.10 (exc) |
| zyxel | wx5600-t0_firmware | to 5.70(aceb.5.1 (exc) |
| zyxel | wx5610-b0_firmware | to 5.18(acgj.0.5 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-476 | The product dereferences a pointer that it expects to be valid but is NULL. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a null pointer dereference issue found in the IP settings CGI program of certain Zyxel firmware versions (VMG3625-T50B and WX3100-T0). It can be exploited by an authenticated attacker with administrator privileges by sending a specially crafted HTTP request, which causes the device to crash or become unresponsive.
How can this vulnerability impact me? :
The impact of this vulnerability is a denial-of-service (DoS) condition. An attacker with administrator access can cause the affected device to stop functioning properly, potentially disrupting network connectivity or services that rely on the device.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know
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