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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2025-54126

19
FAUCET Score

CVE-2025-54126 affects the WebAssembly Micro Runtime (WAMR) iwasm package versions 2.4.0 and below. The vulnerability stems from iwasm's --addr-pool option, which, when configured with an IPv4 address lacking a subnet mask, inadvertently accepts all incoming connections, bypassing intended access restrictions. This medium severity vulnerability (CVSS 5.3) allows unauthorized access to services that rely on --addr-pool for IP-based access control, potentially leading to information disclosure (C:L). Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.4.0CPE matchmatch criteria
cpe:2.3:a:bytecodealliance:webassembly_micro_runtime:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

6.9MEDIUM

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
VS Confidentiality
LOW
VS Integrity
NONE
VS Availability
NONE
SS Confidentiality
LOW
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.61%
Probability of exploitation in next 30 days
EPSS Percentile
45.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0061 is in the 29th percentile among its peer group of 23,705 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (9)

github_advisorypatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: 19787-17086Fixed in: 3.0.6-3
microsoftpatch availablevia msrc
Product: 19445-17084Fixed in: 3.1.9-5
microsoftpatch availablevia msrc
Product: 20420-17084Fixed in: 3.1.9-5
microsoftpatch availablevia msrc
Product: 20380-17086Fixed in: 3.0.6-3
microsoftpatch availablevia msrc
Product: azl3 fluent-bit 3.1.9-4 on Azure Linux 3.0Fixed in: 3.1.9-5
microsoftpatch availablevia msrc
Product: azl3 fluent-bit 3.1.9-5 on Azure Linux 3.0Fixed in: 3.1.9-5
microsoftpatch availablevia msrc
Product: cbl2 fluent-bit 3.0.6-2 on CBL Mariner 2.0Fixed in: 3.0.6-3
microsoftpatch availablevia msrc
Product: cbl2 fluent-bit 3.0.6-3 on CBL Mariner 2.0Fixed in: 3.0.6-3

Vendor Advisories (1)

microsoft2025-Jul/CVE-2025-54126

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

Jul 8, 2025

References

github.com / bytecodealliance/wasm-micro-runtime/commit/121232a9957a069bbb04ebda053bdc72ab409e7a
Patch
github.com / bytecodealliance/wasm-micro-runtime/releases/tag/WAMR-2.4.1
Release Notes
github.com / bytecodealliance/wasm-micro-runtime/security/advisories/GHSA-vh64-mfvw-pxqp
ExploitThird Party Advisory