CVE-2021-47813— Backup Key Recovery 2.2.7 - Denial of Service (PoC)
Quick assessment
Affected
Nsauditor Backup Key Recovery
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Nsasoft Backup Key Recovery是美国Nsasoft公司的一款产品密钥恢复软件。 Nsasoft Backup Key Recovery 2.2.7版本存在安全漏洞，该漏洞源于注册代码输入字段存在溢出，可能导致拒绝服务攻击。
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-47813
Vulnerability Information
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Vulnerability Title
Backup Key Recovery 2.2.7 - Denial of Service (PoC)
Source: CVE Program / CVE List V5
Vulnerability Description
Backup Key Recovery 2.2.7 contains a denial of service vulnerability that allows attackers to crash the application by overflowing the registration code input field. Attackers can paste a large buffer of 256 repeated characters into the registration key field to trigger application instability and potential crash.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5
Vulnerability Title
Nsasoft Backup Key Recovery 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nsasoft Backup Key Recovery是美国Nsasoft公司的一款产品密钥恢复软件。 Nsasoft Backup Key Recovery 2.2.7版本存在安全漏洞，该漏洞源于注册代码输入字段存在溢出，可能导致拒绝服务攻击。
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 |
|---|---|---|---|---|
| Nsauditor | Backup Key Recovery | 2.2.7.0 | - |
|
II. Public POCs for CVE-2021-47813
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Other References for CVE-2021-47813 (1)
-
Backup Key Recovery 2.2.7 - Denial of Service | Advisories | VulnCheck third-party-advisory
Same Patch Batch · Nsauditor · 2026-01-15 · 3 CVEs total
| CVE-2021-47815 | 7.5 HIGH | Nsauditor 3.2.3 - Denial of Service (PoC) |
| CVE-2021-47814 | 7.5 HIGH | NBMonitor 1.6.8 - Denial of Service (PoC) |
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V. Comments for CVE-2021-47813
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