How severe is CVE-2021-25456?

CVE-2021-25456 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2021-25456 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-25456?

CVE-2021-25456 primarily affects Google Android. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-25456?

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

When was CVE-2021-25456 published?

CVE-2021-25456 was published on 2021-09-09 and last updated on 2026-06-17.

CVE-2021-25456

CVE-2021-25456 is a medium-severity vulnerability in Google Android with a CVSS 3.x base score of 5.5. 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-125.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.3
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Google Android
Published: 2021-09-09
Last modified: 2026-06-17

Description

OOB read vulnerability in libswmfextractor.so library prior to SMR Sep-2021 Release 1 allows attackers to execute memcpy at arbitrary address via forged wmf file.

Frequently asked questions

What is CVE-2021-25456?: OOB read vulnerability in libswmfextractor.so library prior to SMR Sep-2021 Release 1 allows attackers to execute memcpy at arbitrary address via forged wmf file.
How severe is CVE-2021-25456?: CVE-2021-25456 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2021-25456 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-25456?: CVE-2021-25456 primarily affects Google Android. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-25456?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-25456 published?: CVE-2021-25456 was published on 2021-09-09 and last updated on 2026-06-17.

References

https://security.samsungmobile.com/securityUpdate.smsb?year=2021&month=9

Affected products (4)

cpe:2.3:o:google:android:8.1:*:*:*:*:*:*:*
cpe:2.3:o:google:android:9.0:*:*:*:*:*:*:*
cpe:2.3:o:google:android:10.0:*:*:*:*:*:*:*
cpe:2.3:o:google:android:11.0:*:*:*:*:*:*:*

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