How severe is CVE-2020-17119?

CVE-2020-17119 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2020-17119 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-17119?

CVE-2020-17119 primarily affects Microsoft 365 Apps. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-17119?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-17119 published?

CVE-2020-17119 was published on 2020-12-10 and last updated on 2026-06-17.

CVE-2020-17119

CVE-2020-17119 is a medium-severity vulnerability in Microsoft 365 Apps with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 5.0
EPSS exploit prediction: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft 365 Apps
Published: 2020-12-10
Last modified: 2026-06-17

Description

Microsoft Outlook Information Disclosure Vulnerability

Frequently asked questions

What is CVE-2020-17119?: Microsoft Outlook Information Disclosure Vulnerability
How severe is CVE-2020-17119?: CVE-2020-17119 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2020-17119 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-17119?: CVE-2020-17119 primarily affects Microsoft 365 Apps. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-17119?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-17119 published?: CVE-2020-17119 was published on 2020-12-10 and last updated on 2026-06-17.

References

Affected products (5)

cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:*:*
cpe:2.3:a:microsoft:office:2019:*:*:*:*:macos:*:*
cpe:2.3:a:microsoft:outlook:2010:sp2:*:*:*:*:*:*
cpe:2.3:a:microsoft:outlook:2013:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:outlook:2016:*:*:*:*:*:*:*

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