A remote code execution vulnerability exists in Microsoft Project software when the software fails to check the source markup of a file, ak…

published 2020-07-14 6y ago modified 2026-06-17 4mo ago also EUVD-2020-12324

cvss: 7.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 4.6%; EPSS 4.6% chance of exploitation in 30 days, percentile 91%
public exploits: 0; none known

A remote code execution vulnerability exists in Microsoft Project software when the software fails to check the source markup of a file, aka 'Microsoft Project Remote Code Execution Vulnerability'.

Patch / fix

links 1

portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1449 advisory

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Exploit prediction

4.65% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	2.0	9.3	AV:N/AC:M/Au:N/C:C/I:C/A:C

Affected products

Microsoft Microsoft Office
Microsoft Microsoft 365 Apps for Enterprise for 32-bit Systems
Microsoft Microsoft 365 Apps for Enterprise for 64-bit Systems
Microsoft Microsoft Project

Classification

Weakness

CWE-346 Origin Validation Error

References

portal.msrc.microsoft.com /en-US/security-guidance/advisory/CVE-2020-1449
patch, vendor-advisory

Sources

CVE List CVE-2020-1449
NVD CVE-2020-1449

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