What’s Vulnerable › Vulnerabilities

CVE-2021-47813: Backup Key Recovery 2.2.7 - Denial of Service (PoC)

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-16 · updated 2026-06-17
• Weakness: CWE-120

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

• Nsauditor Backup Key Recovery: 2.2.7.0

References

• http://www.nsauditor.com
• https://www.exploit-db.com/exploits/49966
• https://www.vulncheck.com/advisories/backup-key-recovery-denial-of-service-poc

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