CVE:CVE-2021-26855
CNNVD:CNNVD-202103-192
Microsoft Exchange Server是美国微软（Microsoft）公司的一套电子邮件服务程序。它提供邮件存取、储存、转发，语音邮件，邮件过滤筛选等功能。
Microsoft Exchange Server 安全漏洞。攻击者可构造恶意HTTP请求，并通过Exchange Server进行身份验证。进而扫描内网，获取用户敏感信息。以下产品和版本受到影响：Microsoft Exchange Server 2013 Cumulative Update 23,Microsoft Exchange Server 2019 Cumulative Update 7,Microsoft Exchange Server 2016 Cumulative Update 18,Microsoft Exchange Server 2016 Cumulative Update 19,Microsoft Exchange Server 2019 Cumulative Update 8。
solution:Upgrade microsoft exchange_server to a higher version than 2013:cumulative_update_21,2013:cumulative_update_22,2013:cumulative_update_23,2016:cumulative_update_10,2016:cumulative_update_11,2016:cumulative_update_12,2016:cumulative_update_13,2016:cumulative_update_14,2016:cumulative_update_15,2016:cumulative_update_16,2016:cumulative_update_17,2016:cumulative_update_18,2016:cumulative_update_19,2016:cumulative_update_8,2016:cumulative_update_9,2019,2019:cumulative_update_1,2019:cumulative_update_2,2019:cumulative_update_3,2019:cumulative_update_4,2019:cumulative_update_5,2019:cumulative_update_6,2019:cumulative_update_7,2019:cumulative_update_8,and avoid the version 2013:cumulative_update_21,2013:cumulative_update_22,2013:cumulative_update_23,2016:cumulative_update_10,2016:cumulative_update_11,2016:cumulative_update_12,2016:cumulative_update_13,2016:cumulative_update_14,2016:cumulative_update_15,2016:cumulative_update_16,2016:cumulative_update_17,2016:cumulative_update_18,2016:cumulative_update_19,2016:cumulative_update_8,2016:cumulative_update_9,2019,2019:cumulative_update_1,2019:cumulative_update_2,2019:cumulative_update_3,2019:cumulative_update_4,2019:cumulative_update_5,2019:cumulative_update_6,2019:cumulative_update_7,2019:cumulative_update_8