CVE-2021-27247
This vulnerability allows remote attackers to disclose sensitive information on affected installations of Tencent WeChat 2.9.5 desktop version. User interaction is required to exploit this vulnerab...
Affects 1 product across 1 vendor.
Software reads data past the boundary of an allocated buffer, leaking sensitive information or causing crashes.
A vulnerability in Tencent WeChat 2.9.5 desktop version allows remote attackers to disclose sensitive information through the WXAM decoder due to improper validation of user-supplied data. User interaction is required to exploit this vulnerability.
BSID: BS-2021-GLOBAL-268087-M • Model: /workspace/models/qwen2.5-coder-32b-instruct-bf16 • Confidence: MEDIUM
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| CVE ID | CVE-2021-27247 |
|---|---|
| BSID | BS-2021-GLOBAL-268087-M BreachSpider Global ID |
| CVSS Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |
| Published | 2021-04-14 |
| Last Modified | 2024-11-21 |
| ICS Relevance | 15% |
| Weakness (CWE) | |
| Source | NVD |
This vulnerability allows remote attackers to disclose sensitive information on affected installations of Tencent WeChat 2.9.5 desktop version. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the WXAM decoder. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the current process. Was ZDI-CAN-11907.
Source: NIST NVD / MITRE CVE Database
The attack vector involves a remote attacker who can exploit this vulnerability by enticing the user to visit a malicious web page or open a malicious file. The vulnerability exists in the WXAM decoder component of WeChat, where user-supplied data is not properly validated, leading to the disclosure of sensitive information.
Exploitation Likelihood: MEDIUM
| Vendor | Product | Fixed Version |
|---|---|---|
| Tencent | — |
No patch URL on record. Monitor vendor security advisories directly.
| CISA KEV | Not in KEV catalog |
|---|---|
| Public Exploit | Not confirmed |
| PoC Code | Not confirmed |
SAGE Enrichment Record — provenance & audit hash
| Model | /workspace/models/qwen2.5-coder-32b-instruct-bf16 |
|---|---|
| Confidence | MEDIUM |
| Enriched At | 2026-05-24 |
| SHA-512 Audit Hash | ec0acb4f2b001b021a7eaf17514b356a43fd1c0c6518e5f34e23806698f4c98b8ebbafee2654f27016981b50eceaaabce82219dd3075b90ee98556a90fe9a234 |
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