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Vulnerability record · CVE-2019-11419 · published 14 May 2019

CVE-2019-11419: Tencent wechat null pointer dereference vulnerability

Tencent · Wechat

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.

5.5 CVSS 3.1 Medium EPSS 4.0% · top 9.8% CWE-476 · NULL pointer dereference
5.5CVSS 3.1 base score, v2 4.3
4.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 4 tagged exploit
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://packetstormsecurity.com/files/152947/WeChat-7.0.4-Denial-Of-Service.html Third Party AdvisoryVDB Entry
https://awakened1712.github.io/hacking/hacking-wechat-dos/ ExploitTechnical Description
https://www.exploit-db.com/exploits/46853 ExploitThird Party AdvisoryVDB Entry
http://packetstormsecurity.com/files/152947/WeChat-7.0.4-Denial-Of-Service.html Third Party AdvisoryVDB Entry
https://awakened1712.github.io/hacking/hacking-wechat-dos/ ExploitTechnical Description
https://www.exploit-db.com/exploits/46853 ExploitThird Party AdvisoryVDB Entry

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2024-40433Tencent wechat vulnerabilityInsecure Permissions vulnerability in Tencent wechat v.8.0.37 allows an attacker to escalate privileges via the web-view component.EPSS 1.2%8.8CVE-2020-27874Tencent wechat memory buffer overflow vulnerabilityThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Tencent WeChat 7.0.18. User interaction is required…EPSS 2.1%7.5CVE-2021-40180Tencent wechat information exposure vulnerabilityIn the WeChat application 8.0.10 for Android and iOS, a mini program can obtain sensitive information from a user's address book via wx.searchContact…EPSS 1.4%6.5CVE-2021-27247Tencent wechat out-of-bounds read vulnerabilityThis vulnerability allows remote attackers to disclose sensitive information on affected installations of Tencent WeChat 2.9.5 desktop version. User …EPSS 6.4%5.4CVE-2019-17151Tencent wechat open redirect vulnerabilityThis vulnerability allows remote attackers redirect users to an external resource on affected installations of Tencent WeChat Prior to 7.0.9. User in…EPSS 1.4%6.2CVE-2026-21525Windows Remote Access Connection Manager null pointer dereference DoSWindows Remote Access Connection Manager contains a null pointer dereference (CWE-476) that lets an unauthorized attacker deny service locally. The f…KEVEPSS 4.8%analysed

Source: NIST National Vulnerability Database (record CVE-2019-11419), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.