CVE-2021-47813
Backup Key Recovery 2.2.7 - Denial of Service (PoC)
- State
- Published
- Severity
- 6.7 Medium
- Published
- Jan 15, 2026
- Updated
- Jan 16, 2026
- Reserved
- Jan 14, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.7 Medium | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Affected Products
| Product | Versions |
|---|---|
Backup Key RecoveryNsauditor |
|
References
- ExploitDB-49966exploit
- Vendor Homepageproduct
- VulnCheck Advisory: Backup Key Recovery 2.2.7 - Denial of Service (PoC)third-party-advisory
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