How severe is CVE-2021-31576?

CVE-2021-31576 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-31576 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-31576?

CVE-2021-31576 primarily affects Mediatek En7580 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-31576?

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-2021-31576 published?

CVE-2021-31576 was published on 2023-02-06 and last updated on 2026-06-17.

CVE-2021-31576

CVE-2021-31576 is a high-severity vulnerability in Mediatek En7580 Firmware with a CVSS 3.x base score of 7.5. 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-862.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-862
Affected product: Mediatek En7580 Firmware
Published: 2023-02-06
Last modified: 2026-06-17

Description

In Boa, there is a possible information disclosure due to a missing permission check. This could lead to remote information disclosure to a proximal attacker with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: A20210008; Issue ID: OSBNB00123241.

Frequently asked questions

What is CVE-2021-31576?: In Boa, there is a possible information disclosure due to a missing permission check. This could lead to remote information disclosure to a proximal attacker with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: A20210008; Issue ID: OSBNB00123241.
How severe is CVE-2021-31576?: CVE-2021-31576 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-31576 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-31576?: CVE-2021-31576 primarily affects Mediatek En7580 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-31576?: 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-2021-31576 published?: CVE-2021-31576 was published on 2023-02-06 and last updated on 2026-06-17.

References

https://corp.mediatek.com/product-security-acknowledgements

Affected products (2)

cpe:2.3:o:mediatek:en7580_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:en7528_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Mediatek En7580 Firmware

CVE-2021-31578 — Critical (CVSS 9.8): In Boa, there is a possible escalation of privilege due to a stack buffer overflow. This could lead to remote…
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