Backup Key Recovery 2.2.7 - Denial of Service (PoC) | Advisories

Advisories

Backup Key Recovery 2.2.7 - Denial of Service (PoC)

severity: medium
date: January 15, 2026
Affecting: Backup Key Recovery 2.2.7.0
CVE: CVE-2021-47813
CWE: CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CVSS: 6.7
CVSS V4 Vector: 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
References: ExploitDB-49966
Vendor Homepage
Credit: Erick Galindo
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.