Vulnerability · Published Jan 15, 2026 · Assigned by VulnCheck
CVE-2021-47813Backup Key Recovery 2.2.7 - Denial of Service (PoC)
High 7.5
In plain English
A high-severity buffer overflow in Backup Key Recovery from Nsauditor. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.4%top 65.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Nsauditor | Backup Key Recovery | 2.2.7.0 |
Weakness: CWE-120 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- ExploitDB-49966 exploit
- Vendor Homepage product
- VulnCheck Advisory: Backup Key Recovery 2.2.7 - Denial of Service (PoC) third-party-advisory