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Fencer Vulns
high 8.4

CVE-2020-17141 json

Microsoft Exchange Remote Code Execution Vulnerability

published 2020-12-09 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-9095

cvss
8.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
6.6%
EPSS 6.6% chance of exploitation in 30 days, percentile 93%
public exploits
0
none known

Summary

Microsoft Exchange Remote Code Execution Vulnerability

Patch / fix

Exploit prediction

6.63% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.4 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C
CNA 3.1 8.4 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
NVD 2.0 6.0 AV:N/AC:M/Au:S/C:P/I:P/A:P

Affected products

  • Microsoft Microsoft Exchange Server 2016 Cumulative Update 17
  • Microsoft Microsoft Exchange Server 2016 Cumulative Update 18
  • Microsoft Microsoft Exchange Server 2019 Cumulative Update 6
  • Microsoft Microsoft Exchange Server 2019 Cumulative Update 7

Classification

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.