CVE-2025-64704Public exploit

Process crash via unhandled SIMD store opcode

Published Nov 25, 2025 · Updated Nov 26, 2025

Improper exceptional-condition handling in WAMR before 2.4.4 allows local users to crash iwasm with a crafted WebAssembly module. The classic interpreter's per-instance running-mode path fails to reject a v128.store SIMD opcode and reaches an unhandled null-address fault. Exploitation requires user interaction and classic interpreter mode; the demonstrated consequence is termination of the iwasm process.

CVSS severity5.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper exceptional-condition handling in WAMR before 2.4.4 allows local users to crash iwasm with a crafted WebAssembly module. The classic interpreter's per-instance running-mode path fails to reject a v128.store SIMD opcode and reaches an unhandled null-address fault. Exploitation requires user interaction and classic interpreter mode; the demonstrated consequence is termination of the iwasm process.

The record

CVE
CVE-2025-64704
Published
Nov 25, 2025
Updated
Nov 26, 2025
Vendor
Bytecode Alliance
Product
WebAssembly Micro Runtime (WAMR)
Classifications
CWE-754, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 25, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 26, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.4.4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Bytecode Alliance · WebAssembly Micro Runtime (WAMR)version=< 2.4.4

Published CVSS scores

4.7GitHubCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
5.5NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-754Improper Check for Unusual or Exceptional Conditions
T1204.002Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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