How severe is CVE-2021-38657?

CVE-2021-38657 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability low.

Is CVE-2021-38657 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-38657?

CVE-2021-38657 affects Microsoft 365 Apps. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-38657?

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

When was CVE-2021-38657 published?

CVE-2021-38657 was published on 2021-09-15 and last updated on 2026-06-17.

CVE-2021-38657

CVE-2021-38657 is a medium-severity vulnerability in Microsoft 365 Apps with a CVSS 3.x base score of 6.1. 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 6.1)
CVSS v2: 2.1
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft 365 Apps
Published: 2021-09-15
Last modified: 2026-06-17

Description

Microsoft Office Graphics Component Information Disclosure Vulnerability

Frequently asked questions

What is CVE-2021-38657?: Microsoft Office Graphics Component Information Disclosure Vulnerability
How severe is CVE-2021-38657?: CVE-2021-38657 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability low.
Is CVE-2021-38657 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-38657?: CVE-2021-38657 affects Microsoft 365 Apps. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-38657?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-38657 published?: CVE-2021-38657 was published on 2021-09-15 and last updated on 2026-06-17.

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-38657

Affected products (1)

cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:*:*

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