How severe is CVE-2020-1449?

CVE-2020-1449 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-1449 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-1449?

CVE-2020-1449 primarily affects Microsoft 365 Apps. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-1449?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-1449 published?

CVE-2020-1449 was published on 2020-07-14 and last updated on 2026-06-17.

CVE-2020-1449

CVE-2020-1449 is a high-severity vulnerability in Microsoft 365 Apps with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-346.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 9.3
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-346
Affected product: Microsoft 365 Apps
Published: 2020-07-14
Last modified: 2026-06-17

Description

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'.

Frequently asked questions

What is CVE-2020-1449?: 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'.
How severe is CVE-2020-1449?: CVE-2020-1449 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-1449 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-1449?: CVE-2020-1449 primarily affects Microsoft 365 Apps. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-1449?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-1449 published?: CVE-2020-1449 was published on 2020-07-14 and last updated on 2026-06-17.

References

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

Affected products (9)

cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*
cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:*
cpe:2.3:a:microsoft:office:2010:sp2:*:*:*:*:x64:*
cpe:2.3:a:microsoft:office:2010:sp2:*:*:*:*:x86:*
cpe:2.3:a:microsoft:office:2013:sp1:*:*:*:*:x64:*
cpe:2.3:a:microsoft:office:2013:sp1:*:*:*:*:x86:*
cpe:2.3:a:microsoft:office:2019:*:*:*:*:-:*:*
cpe:2.3:a:microsoft:project_2016:-:*:*:*:*:*:x64:*
cpe:2.3:a:microsoft:project_2016:-:*:*:*:*:*:x86:*

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