Microsoft Microsoft Exchange Server 2016 Cumulative Update 16

Name: Microsoft Microsoft Exchange Server 2016 Cumulative Update 16
Brand: Microsoft

productEU

A product tracked in the threat graph; the vulnerabilities below are known to affect it.

unpatched

critical

by severity

0critical2high3medium0low

updated 2026-10-27

vulnerabilities (5)

Related CVEs.

sort

ID	severity	EPSS	exploitable	patched	published	affected
CVE-2021-26855US	high7.5OT critical	100.0% (100th)	KEV	publication	2021-03-03	15.01.0 → publication
CVE-2021-27065US	medium6.8OT critical	99.9% (100th)	KEV	publication	2021-03-03	15.01.0 → publication
CVE-2021-26857US	medium6.8OT critical	95.8% (100th)	KEV	publication	2021-03-03	15.01.0 → publication
CVE-2021-26858US	medium6.8OT critical	93.7% (100th)	KEV	publication	2021-03-03	15.01.0 → publication
CVE-2020-16875US	high9.0	46.5% (99th)	Exploit	publication	2020-09-11	15.01.0 → publication

The flaw types (CWEs) most of these CVEs share.

CWE-20Improper Input Validation2 CVEs
CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')1 CVEs
CWE-269Improper Privilege Management1 CVEs
CWE-502Deserialization of Untrusted Data1 CVEs
CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')1 CVEs
CWE-918Server-Side Request Forgery (SSRF)1 CVEs
CWE-94Improper Control of Generation of Code ('Code Injection')1 CVEs

Which sources assert this record, and when.

scry

Products carry known vulnerabilities once they are exposed to the internet. See what is exposed on your perimeter with a free passive scan.