从提供的网页截图中，可以获取到以下关于漏洞的关键信息： 标题（Title）: Backup Key Recovery 2.2.7 - Denial of Service 严重性（Severity）: MEDIUM 日期（Date）: January 15, 2026 影响范围（Affecting）: Backup Key Recovery 2.2.7.0 CVE和CWE编号: - CVE: CPE-2021-47813 - CWE: CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') CVSS评分: 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 相关链接: - ExploitDB链接: exploitdb.com/exploits/49966 - 厂商主页: Vendor Homepage 报告者（Credit）: Erick Galindo 漏洞描述（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.