Skip to content
VulniPulse
Critical9.1Microsoft Server

CVE-2021-26412: Microsoft Exchange Server Remote Code Execution Vulnerability

This Microsoft advisory covers CVE-2021-26412 in Microsoft Exchange Server 2013 Cumulative Update 23, Microsoft Exchange Server 2016 Cumulative Update 18 and Microsoft Exchange Server 2016 Cumulative Update 19.

Open the Microsoft advisory

Key facts

Vendor rating
Critical, CVSS 9.1
CISA KEV
Not listed (catalogue checked )
Affected
Microsoft Exchange Server 2013 Cumulative Update 23 15.00.0 before 15.00.1497.012; Microsoft Exchange Server 2016 Cumulative Update 18 15.01.0 before 15.01.2106.013; Microsoft Exchange Server 2016 Cumulative Update 19 15.01.0 before 15.01.2176.009 and 2 more below
Fixed in
15.00.1497.012, 15.01.2106.013, 15.01.2176.009 and 2 more below
Source published
Source revised
Listed by VulniPulse

Compiled by VulniPulse from the linked sources. How records are collected and checked.

Affected products & platforms

Microsoft ServerExchange Server

Description

Microsoft Exchange Server Remote Code Execution Vulnerability

Affected products named by the advisory: Microsoft Exchange Server 2013 Cumulative Update 23; Microsoft Exchange Server 2016 Cumulative Update 18; Microsoft Exchange Server 2016 Cumulative Update 19; Microsoft Exchange Server 2019 Cumulative Update 7; and 1 more.

Affected products named by the advisory: Microsoft Exchange Server 2019 Cumulative Update 8.

Text from the source record.

Affected versions
  • Microsoft Exchange Server 2013 Cumulative Update 23 15.00.0 before 15.00.1497.012
  • Microsoft Exchange Server 2016 Cumulative Update 18 15.01.0 before 15.01.2106.013
  • Microsoft Exchange Server 2016 Cumulative Update 19 15.01.0 before 15.01.2176.009
  • Microsoft Exchange Server 2019 Cumulative Update 7 15.02.0 before 15.02.0721.013
  • Microsoft Exchange Server 2019 Cumulative Update 8 15.02.0 before 15.02.0792.010

Official advisory · high-confidence parse· fetched ·verify at source

How to fix CVE-2021-26412

Upgrade to a fixed release named by Microsoft:

  • 15.00.1497.012
  • 15.01.2106.013
  • 15.01.2176.009
  • 15.02.0721.013
  • 15.02.0792.010

End-of-life dates for Microsoft Exchange Server

Microsoft Server advisories, March 2021All Microsoft Server advisories

Get an email when Microsoft Exchange Server publishes the next one.

See Microsoft Exchange Server's last 90 days of advisories first. Then choose one product with live alerts free for life, or a free month of real-time alerts on everything with the severity, the fixed version and the vendor's link (card needed, then US$15/month; we email you before the first charge).

Alert me about Microsoft Exchange Server

iPhone and Android apps · New on the App Store

Monitor future Microsoft Server CVEs from your phone.

Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 34 official vendor sources and 160+ reviewed platform categories.