CVEvulnerability

CVE-2020-0688

8.8 HIGH Known exploited Published 2020-02-11 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

Microsoft Exchange Server Validation Key Remote Code Execution Vulnerability — Microsoft Exchange Server

Microsoft Exchange Server Validation Key fails to properly create unique keys at install time, allowing for remote code execution.

Added to KEV
2021-11-03
Remediation due
2022-05-03
Ransomware use
Known
Required action
Apply updates per vendor instructions.
Notes
https://nvd.nist.gov/vuln/detail/CVE-2020-0688
Status
Analyzed
Published
2020-02-11
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
9.0 HIGH — AV:N/AC:L/Au:S/C:C/I:C/A:C
Weaknesses
CWE-287

Description

A remote code execution vulnerability exists in Microsoft Exchange software when the software fails to properly handle objects in memory, aka 'Microsoft Exchange Memory Corruption Vulnerability'.

Affected configurations

• microsoft exchange server 2010 • microsoft exchange server 2013 • microsoft exchange server 2016 • microsoft exchange server 2019

Related

Weakness · CWE (1)

  • CWE-287 Improper Authentication weakness

Referenced by CWE · observed example (1)

  • CWE-287 Improper Authentication weakness

References