CVE-2020-0688

high

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'.

From the Tenable Blog

CVE-2020-0688: Microsoft Exchange Server Static Key Flaw Could Lead to Remote Code Execution

CVE-2020-0688: Microsoft Exchange Server Static Key Flaw Could Lead to Remote Code Execution

Published: 2020-02-26

Attackers are probing for vulnerable Microsoft Exchange Servers, as details surrounding a severe flaw were recently made public. Update 02/27/2020: The proof-of-concept section has been updated to reflect the availability of several exploit scripts, including those that can be used to automate exploitation.

References

https://www.zerodayinitiative.com/advisories/ZDI-20-258/

https://thehackernews.com/2025/07/hackers-exploit-apache-http-server-flaw.html

https://securelist.com/ghostcontainer/116953/

https://www.microsoft.com/en-us/security/blog/2023/03/24/guidance-for-investigating-attacks-using-cve-2023-23397/

https://www.tenable.com/cyber-exposure/tenable-2022-threat-landscape-report

https://www.tenable.com/cyber-exposure/a-look-inside-the-ransomware-ecosystem

https://www.cisa.gov/news-events/cybersecurity-advisories/aa22-117a

https://www.cisa.gov/news-events/cybersecurity-advisories/aa21-209a

https://www.cisa.gov/news-events/cybersecurity-advisories/aa20-296a

https://media.defense.gov/2020/Oct/20/2002519884/-1/-1/0/CSA_CHINESE_EXPLOIT_VULNERABILITIES_UOO179811.PDF

https://www.tenable.com/blog/contileaks-chats-reveal-over-30-vulnerabilities-used-by-conti-ransomware-affiliates

https://www.tenable.com/blog/government-advisories-warn-of-apt-activity-resulting-from-russian-invasion-of-ukraine

https://www.tenable.com/blog/microsoft-s-november-2020-patch-tuesday-addresses-112-cves-including-cve-2020-17087

https://www.tenable.com/blog/government-agencies-warn-of-state-sponsored-actors-exploiting-publicly-known-vulnerabilities

https://www.tenable.com/blog/us-cybersecurity-agency-cisa-alert-foreign-threat-actors-target-unpatched-vulnerabilities

https://www.tenable.com/blog/cve-2020-0688-microsoft-exchange-server-static-key-flaw-could-lead-to-remote-code-execution

https://www.tenable.com/blog/how-covid-19-response-is-expanding-the-cyberattack-surface

https://www.tenable.com/blog/microsoft-s-february-2020-patch-tuesday-addresses-99-cves-including-internet-explorer-zero-day

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0688

http://packetstormsecurity.com/files/156620/Exchange-Control-Panel-Viewstate-Deserialization.html

http://packetstormsecurity.com/files/156592/Microsoft-Exchange-2019-15.2.221.12-Remote-Code-Execution.html

Details

Source: Mitre, NVD

Published: 2020-02-11

Updated: 2025-04-04

Known Exploited Vulnerability (KEV)

Risk Information

CVSS v2

Base Score: 9

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.94396