CVE-2021-3554— Improper Access Control vulnerability in the patchesUpdate API
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I. Basic Information for CVE-2021-3554
Vulnerability Information
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Vulnerability Title
Improper Access Control vulnerability in the patchesUpdate API
Source: NVD (National Vulnerability Database)
Vulnerability Description
Improper Access Control vulnerability in the patchesUpdate API as implemented in Bitdefender Endpoint Security Tools for Linux as a relay role allows an attacker to manipulate the remote address used for pulling patches. This issue affects: Bitdefender Endpoint Security Tools for Linux versions prior to 6.6.27.390; versions prior to 7.1.2.33. Bitdefender Unified Endpoint versions prior to 6.2.21.160. Bitdefender GravityZone versions prior to 6.24.1-1.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
访问控制不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Bitdefender Endpoint Security Tool 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Bitdefender Endpoint Security Tool是罗马尼亚比特梵德（Bitdefender）公司的一款终端安全管理工具。 Bitdefender Endpoint Security Tools 存在安全漏洞，该漏洞源于软件实现的补丁更新API中不适当的访问控制，该漏洞允许攻击者作为中继角色操纵用于拉补丁的远程地址。
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
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Bitdefender | Endpoint Security Tools for Linux | unspecified ~ 6.6.27.390 | - | |
| Bitdefender | Unified Endpoint | unspecified ~ 6.2.21.160 | - | |
| Bitdefender | GravityZone | unspecified ~ 6.24.1-1 | - |
II. Public POCs for CVE-2021-3554
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Bitdefender · 2021-11-24 · 3 CVEs total
| CVE-2021-3553 | 5.3 MEDIUM | Server-Side Request Forgery in EPPUpdateService remote config file (VA-9825) |
| CVE-2021-3552 | 5.3 MEDIUM | Insufficient validation on regular expression in EPPUpdateService config file (VA-9825) |
IV. Related Vulnerabilities
Same vendor: Bitdefender
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SSRF in GravityZone Console via DNS Truncation (VA-12634) - CVE-2025-2244
Insecure PHP deserialization issue in GravityZone Console (V
Same weakness: CWE-284
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Avo: Broken Access Control: Unauthorized Execution of Arbitr - CVE-2026-41487
Langfuse: Improper role-based-access control in Langfuse LLM - CVE-2026-42278
UltraDAG: Smart Account Spending Policy Bypass via Pockets
V. Comments for CVE-2021-3554
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