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CVE-2020-0855

29
FAUCET Score

CVE-2020-0855 is a remote code execution vulnerability in Microsoft Word and Office 365 ProPlus, stemming from improper object handling in memory. With a CVSS score of 7.8 (High), it requires user interaction (e.g., opening a malicious document) but can lead to complete compromise of confidentiality, integrity, and availability. While not listed in CISA's KEV catalog, its EPSS score and FAUCET Risk Score indicate a significant threat, and it has received notable community discussion and media coverage despite no public exploit code or active exploitation being confirmed.

Impacted Technologies

VendorProductVersion(s)CPE
2019CPE matchmatch criteria
cpe:2.3:a:microsoft:office:2019:*:*:*:*:macos:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:microsoft:office_365_proplus:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
11.55%
Probability of exploitation in next 30 days
EPSS Percentile
95.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.1155 is in the 95th percentile among its peer group of 11,621 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Microsoft Office 2019 for Mac
View patch
microsoftpatch availablevia msrc
Product: Office 365 ProPlus for 32-bit Systems
microsoftpatch availablevia msrc
Product: Office 365 ProPlus for 64-bit Systems

Vendor Advisories (1)

microsoft2020-Mar/CVE-2020-0855Important

Microsoft Word Remote Code Execution Vulnerability

Mar 10, 2020

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2020-0855
PatchVendor Advisory