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I. Basic Information for CVE-2025-4134
Vulnerability Information

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Vulnerability Title
Lack of file validation in Avast Business Antivirus for Linux allows writing untrusted update files
Source: NVD (National Vulnerability Database)
Vulnerability Description
Lack of file validation in do_update_vps in Avast Business Antivirus for Linux 4.5 on Linux allows local user to spoof or tamper with the update file via an unverified file write.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
对外部实体的文件或目录可访问
Source: NVD (National Vulnerability Database)
Vulnerability Title
Avast Business Antivirus 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Avast Business Antivirus是Avast公司的一款商业网络防病毒软件。 Avast Business Antivirus 4.5版本存在安全漏洞,该漏洞源于文件验证不足,可能导致更新文件被篡改。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
AvastAvast Business Antivirus 4.5.1 -
II. Public POCs for CVE-2025-4134
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III. Intelligence Information for CVE-2025-4134
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IV. Related Vulnerabilities
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