Vulnpedia
← All CVEs

CVE-2020-0688

HIGH 8.8 KNOWN EXPLOITED RANSOMWARE PoC CATALOGUED ALL-YEARS

Published 2020-02-11 · Last modified 2025-10-21 · microsoft · NVD: Analyzed

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'.

ACTIVELY EXPLOITED

Confirmed exploited in the wild — in CISA KEV since 2021-11-03, linked to ransomware campaigns. Patch or mitigate now.

Exploitation likelihood

100.0%chance of exploitation in 30 days · 100th percentile

● In CISA KEV (2021-11-03)● Catalogued PoC◆ SSVC: exploitation active, automatable no

Impact if exploited

8.8CVSS 3.1 · HIGH · ADP

  • ConfidentialityHigh
  • IntegrityHigh
  • AvailabilityHigh

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ⚠Privileges: Requires a low-privilege account
  • ✓User interaction: No user interaction needed
  • ✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

Public PoC or exploit resources are catalogued below.

Listed by the named source; Vulnpedia has not tested these resources.

PoC data: JSON

Resource commands

searchsploit --cve CVE-2020-0688 && searchsploit -m 48168Fetch the ExploitDB PoC locally; review the code before running it.
searchsploit --cve CVE-2020-0688 && searchsploit -m 48153Fetch the ExploitDB PoC locally; review the code before running it.
curl -s https://vulnpedia.com/cve/CVE-2020-0688/poc.jsonMachine-readable PoC index for this CVE (for automation).

Search for new PoCs

Search GitHub now — results may be empty or unverified.

Tracked sources are checked weekly for the full archive, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Data snapshot:

Affected

Vendors Microsoft

Products Microsoft Exchange Server 2013 Microsoft Exchange Server 2019 Cumulative Update 3 Microsoft Exchange Server 2016 Cumulative Update 14 Microsoft Exchange Server 2016 Cumulative Update 15 Microsoft Exchange Server 2019 Cumulative Update 4 Microsoft Exchange Server 2010 Service Pack 3 Update Rollup 30 Exchange Server

Weakness (CWE)

  • CWE-287: Improper Authentication

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References and research data (JSON)

Unverified PoC candidates

Catalogue matches for further research. These repositories have not been validated as working exploits.

25 candidates

Additional exploitation reports

Source-specific reports, separate from CISA KEV. Repeated observations from one source are not independent confirmations.

27 more source reports

Known Affected Software Configurations

VendorProductVersion range
MicrosoftExchange Server2010
MicrosoftExchange Server2013
MicrosoftExchange Server2016
MicrosoftExchange Server2016
MicrosoftExchange Server2019
MicrosoftExchange Server2019

All CVSS metrics

  • HIGH 8.8 v3.1 · ADP Primary
    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • HIGH 8.8 v3.1 · NVD Primary
    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • HIGH 9 v2.0 · NVD Primary
    AV:N/AC:L/Au:S/C:C/I:C/A:C

References

Exploit-tagged references (not proof of a PoC)

Patches & mitigations

Advisories

Technical & other

Sources: NVD · CVE.org · All sources and attribution · EPSS