How severe is CVE-2021-31577?

CVE-2021-31577 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-31577 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-31577?

CVE-2021-31577 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-2021-31577?

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

When was CVE-2021-31577 published?

CVE-2021-31577 was published on 2023-02-06 and last updated on 2026-06-17.

CVE-2021-31577

CVE-2021-31577 is a critical-severity vulnerability in Mediatek En7580 Firmware with a CVSS 3.x base score of 9.8. 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-862.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (63rd 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 escalation of privilege due to a missing permission check. This could lead to remote escalation of privilege from 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-2021-31577?: In Boa, there is a possible escalation of privilege due to a missing permission check. This could lead to remote escalation of privilege from 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-2021-31577?: CVE-2021-31577 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-31577 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-31577?: CVE-2021-31577 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-2021-31577?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-31577 published?: CVE-2021-31577 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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CVE-2021-31573 — Critical (CVSS 9.8): In Config Manager, there is a possible command injection due to improper input validation. This could lead to remote…
CVE-2021-31576 — High (CVSS 7.5): In Boa, there is a possible information disclosure due to a missing permission check. This could lead to remote…

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