CVE-2025-54640 – CVE-2025-54640 is a ParcelMismatch vulnerabilit... (How to Fix)

Q: What is the severity of CVE-2025-54640?

CVE-2025-54640 has a CVSS score of 5.5 (MEDIUM). CVE-2025-54640 is a ParcelMismatch vulnerability in attribute deserialization that allows attackers to manipulate data structures during deserialization. Successful exploitation causes playback control screen display exceptions, affecting Huawei consumer devices running vulnerable software versions.

📋 TL;DR

CVE-2025-54640 is a ParcelMismatch vulnerability in attribute deserialization that allows attackers to manipulate data structures during deserialization. Successful exploitation causes playback control screen display exceptions, affecting Huawei consumer devices running vulnerable software versions.

💻 Affected Systems

Products:

Huawei consumer devices with media playback capabilities

Versions: Specific versions not detailed in advisory; check Huawei bulletin for affected versions

Operating Systems: HarmonyOS, Android-based Huawei systems

Default Config Vulnerable: ⚠️ Yes

Notes: Affects devices with media playback functionality; exact product list requires checking Huawei's security bulletin

📦 What is this software?

Harmonyos by Huawei

View all CVEs affecting Harmonyos →

Harmonyos by Huawei

View all CVEs affecting Harmonyos →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete disruption of media playback functionality leading to denial of service for affected devices

🟠

Likely Case

Temporary display corruption or malfunction of playback controls requiring user intervention

🟢

If Mitigated

Minor visual artifacts that don't impact core functionality

🌐 Internet-Facing: MEDIUM - Requires user interaction with malicious content but affects consumer devices

🏢 Internal Only: LOW - Primarily impacts individual device functionality rather than network infrastructure

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ✅ No

Complexity: MEDIUM

Requires specific deserialization conditions; likely needs user interaction with crafted media content

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Check Huawei security updates for August 2025

Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2025/8/

Restart Required: No

Instructions:

1. Check device for available security updates 2. Install August 2025 security patch 3. Verify update completes successfully

🔧 Temporary Workarounds

Disable automatic media playback

all

Prevent automatic processing of media files that could trigger the vulnerability

🧯 If You Can't Patch

Restrict media sources to trusted providers only
Implement network segmentation for media playback devices

🔍 How to Verify

Check if Vulnerable:

Check device security patch level in Settings > System & updates > Software update

Check Version:

Settings > About phone > Build number

Verify Fix Applied:

Verify August 2025 security patch is installed and device build date is after patch release

📡 Detection & Monitoring

Log Indicators:

Media playback service crashes
Deserialization errors in system logs
Display service exceptions

Network Indicators:

Unusual media file downloads
Suspicious media streaming sources

SIEM Query:

event_category:system_error AND (process:media_player OR service:display) AND error:deserialization

📊 Metadata

CVE ID: CVE-2025-54640

CVSS v3 Score: 5.5 (MEDIUM)

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE: CWE-502

EPSS Score: 0.11% exploit probability (28.6th percentile)

Published: August 6, 2025

Last Updated: September 20, 2025

🔗 References

https://consumer.huawei.com/en/support/bulletin/2025/8/ Vendor Advisory

📤 Share & Export

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🔗 Related Vulnerabilities

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