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CVE-2025-54126— WebAssembly Micro Runtime's `--addr-pool` option allows all IPv4 addresses when subnet mask is not specified

Quick assessment

Affected
bytecodealliance wasm-micro-runtime
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WebAssembly Micro Runtime（WAMR）是Bytecode Alliance开源的一种轻量级的独立 WebAssembly 运行时。具有占用空间小、高性能和高度可配置的功能，适用于从嵌入式、物联网、边缘到可信执行环境 (TEE)、智能合约、云原生等应用程序。 WebAssembly Micro Runtime 2.4.0及之前版本存在安全漏洞，该漏洞源于--addr-pool参数使用不当，可能导致绕过访问限制。

AI Predicted 8.1 Difficulty: Easy EPSS 0.63% · P49

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-54126

Vulnerability Information
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Vulnerability Title
WebAssembly Micro Runtime's `--addr-pool` option allows all IPv4 addresses when subnet mask is not specified
Source: CVE Program / CVE List V5
Vulnerability Description
The WebAssembly Micro Runtime's (WAMR) iwasm package is the executable binary built with WAMR VMcore which supports WebAssembly System Interface (WASI) and command line interface. In versions 2.4.0 and below, iwasm uses --addr-pool with an IPv4 address that lacks a subnet mask, allowing the system to accept all IP addresses. This can unintentionally expose the service to all incoming connections and bypass intended access restrictions. Services relying on --addr-pool for restricting access by IP may unintentionally become open to all external connections. This may lead to unauthorized access in production deployments, especially when users assume that specifying an IP without a subnet mask implies a default secure configuration. This is fixed in version 2.4.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
将资源暴露给错误范围
Source: CVE Program / CVE List V5
Vulnerability Title
WebAssembly Micro Runtime 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WebAssembly Micro Runtime（WAMR）是Bytecode Alliance开源的一种轻量级的独立 WebAssembly 运行时。具有占用空间小、高性能和高度可配置的功能，适用于从嵌入式、物联网、边缘到可信执行环境 (TEE)、智能合约、云原生等应用程序。 WebAssembly Micro Runtime 2.4.0及之前版本存在安全漏洞，该漏洞源于--addr-pool参数使用不当，可能导致绕过访问限制。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
bytecodealliance wasm-micro-runtime < 2.4.1 -

II. Public POCs for CVE-2025-54126

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III. Intelligence Information for CVE-2025-54126

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Vendor Advisories for CVE-2025-54126 (1)

IV. Related Vulnerabilities

Same product: wasm-micro-runtime
Same vendor: bytecodealliance
Same weakness: CWE-668

V. Comments for CVE-2025-54126

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