CVE-2019-11419

MEDIUM

WeChat < 7.0.3 - Denial of Service via Crafted .wxgf Emoji File

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2019-11419. PoCs published by Hong Nhat Pham.

AI-analyzed exploit summary This exploit demonstrates a Denial of Service (DoS) vulnerability in WeChat for Android by replacing an emoji file with a crafted .wxgf file, causing the application to crash when the emoji is rendered. The PoC requires local access and specific prerequisites, such as the user having sent or received a GIF file in WeChat.

Description

vcodec2_hls_filter in libvoipCodec_v7a.so in the WeChat application through 7.0.3 for Android allows attackers to cause a denial of service (application crash) by replacing an emoji file (under the /sdcard/tencent/MicroMsg directory) with a crafted .wxgf file. The content of the replacement must be derived from the phone's IMEI. The crash occurs upon receiving a message that contains the replaced emoji.

Exploits (1)

exploitdb WORKING POC
by Hong Nhat Pham · textdosandroid
https://www.exploit-db.com/exploits/46853

This exploit demonstrates a Denial of Service (DoS) vulnerability in WeChat for Android by replacing an emoji file with a crafted .wxgf file, causing the application to crash when the emoji is rendered. The PoC requires local access and specific prerequisites, such as the user having sent or received a GIF file in WeChat.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Moderate
Reliability
Reliable
Target: WeChat for Android (up to version 7.0.4)
No auth needed
Prerequisites: Local access to the device · User must have sent or received a GIF file in WeChat · Retrieval of the phone's IMEI
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Exploit, Technical Description x_refsource_misc
https://awakened1712.github.io/hacking/hacking-wechat-dos/
Exploit, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/46853

Scores

CVSS v3 5.5
EPSS 0.0403
EPSS Percentile 89.3%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Details

CWE
CWE-476
Status published
Products (1)
tencent/wechat < 7.0.3
Published May 14, 2019
Tracked Since Feb 18, 2026