Zyxel VMG3625-T50B/WX3100-T0 up to 5.50(ABPM.9.6)C0 HTTP Request null pointer dereference

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.9$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in Zyxel VMG3625-T50B and WX3100-T0 up to 5.50(ABPM.9.6)C0. This issue affects some unknown processing of the component HTTP Request Handler. Executing a manipulation can lead to null pointer dereference. The identification of this vulnerability is CVE-2025-11845. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in Zyxel VMG3625-T50B and WX3100-T0 up to 5.50(ABPM.9.6)C0 and classified as problematic. This vulnerability affects an unknown function of the component HTTP Request Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. CVE summarizes:

A null pointer dereference vulnerability in the certificate downloader 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.

This vulnerability was named CVE-2025-11845 since 10/16/2025. The exploitation appears to be easy. The attack can be initiated remotely. Additional levels of successful authentication are needed for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 02/24/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.9
VulDB Meta Temp Score: 4.9

VulDB Base Score: 4.9
VulDB Temp Score: 4.9
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 4.9
CNA Vector (Zyxel): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

10/16/2025 CVE reserved
02/24/2026 +131 days Advisory disclosed
02/24/2026 +0 days VulDB entry created
02/24/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: zyxel.com

Status: Not defined

CVE: CVE-2025-11845 (🔒)
GCVE (CVE): GCVE-0-2025-11845
GCVE (VulDB): GCVE-100-347494

Entryinfo

Created: 02/24/2026 07:37
Changes: 02/24/2026 07:37 (61)
Complete: 🔍
Cache ID: 216::103

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