VYPR
High severity7.8CISA KEVNVD Advisory· Published Mar 3, 2021· Updated Aug 12, 2026

CVE-2021-26857

CVE-2021-26857

Description

Microsoft Exchange Server Remote Code Execution Vulnerability

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

29
  • cpe:2.3:a:microsoft:exchange_server:2019:*:*:*:*:*:*:*+ 28 more
    • cpe:2.3:a:microsoft:exchange_server:2019:*:*:*:*:*:*:*range: 15.02.0
    • cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_1:*:*:*:*:*:*range: 15.00.0
    • cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_21:*:*:*:*:*:*range: 15.00.0
    • (no CPE)
    • cpe:2.3:a:microsoft:exchange_server:2010:sp3:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_22:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_23:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:exchange_server:2013:sp1:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_10:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_11:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_12:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_13:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_14:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_15:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_16:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_17:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_18:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_19:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_8:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_9:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:exchange_server:2019:-:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_1:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_2:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_3:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_4:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_5:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_6:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_7:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_8:*:*:*:*:*:*

Patches

Vulnerability mechanics

References

2

News mentions

2