CVE-2020-0688A 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'.
Updated under an hour ago ()
Does this affect you?
It affects Microsoft Exchange Server 2013 and 6 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Nov 3, 2021; federal agencies had to remediate by May 3, 2022, and it is known to be used in ransomware. Treat that date as your deadline.
Do this next
Free account, 1 product
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'.
- CVSS
- 8.8 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-287
- Known exploited
- Added to CISA KEV Nov 3, 2021; federal remediation due May 3, 2022; known ransomware useApply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 99.96% (percentile 100)
- Assigned by
- microsoft
- NVD analysis
- Analyzed
- Record last updated
- Oct 21, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Microsoft Microsoft Exchange Server 2013 microsoft:exchange_server_2013 (from the name) | Cumulative Update 23 | CNA record |
Microsoft Microsoft Exchange Server 2019 Cumulative Update 3 microsoft:exchange_server_2019_cumulative_update_3 (from the name) | unspecified | CNA record |
Microsoft Microsoft Exchange Server 2016 Cumulative Update 14 microsoft:exchange_server_2016_cumulative_update_14 (from the name) | unspecified | CNA record |
Microsoft Microsoft Exchange Server 2016 Cumulative Update 15 microsoft:exchange_server_2016_cumulative_update_15 (from the name) | unspecified | CNA record |
Microsoft Microsoft Exchange Server 2019 Cumulative Update 4 microsoft:exchange_server_2019_cumulative_update_4 (from the name) | unspecified | CNA record |
Microsoft Microsoft Exchange Server 2010 Service Pack 3 Update Rollup 30 microsoft:exchange_server_2010_service_pack_3_update_rollup_30 (from the name) | unspecified | CNA record |
microsoft exchange_server microsoft:exchange_server | 2010; 2013; 2016; 2016; 2019; 2019 | NVD |
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0688x-refsource-misc, patch, vendor-advisory
- https://www.zerodayinitiative.com/advisories/ZDI-20-258/x-refsource-misc, third-party-advisory, vdb-entry
- http://packetstormsecurity.com/files/156592/Microsoft-Exchange-2019-15.2.221.12-Remote-Code-Execution.htmlx-refsource-misc, exploit, third-party-advisory, vdb-entry
- http://packetstormsecurity.com/files/156620/Exchange-Control-Panel-Viewstate-Deserialization.htmlx-refsource-misc, exploit, third-party-advisory, vdb-entry
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-0688us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.