Is CVE-2021-31577 in the CISA KEV catalog?

No. CVE-2021-31577 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-31577?

CVE-2021-31577 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2021-31577?

CVE-2021-31577 has an EPSS score of 1.15% (63th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-31577?

Upgrade en7528 firmware to tlm7.3.275.0-64 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2021-31577

CRITICAL

9.8

CVSS v3

NVD

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.

CWE-862Missing Authorization

How to fix

Remediation Available

en7528 firmwareNVD

Affected:< tlm7.3.275.0-64Fixed in:tlm7.3.275.0-64CVE-2021-31577derived from NVD

en7580 firmwareNVD

Affected:< tlm7.3.275.0-64Fixed in:tlm7.3.275.0-64CVE-2021-31577derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

1.15%probability of exploitation in 30 days

63rdpercentile

Moderate risk: more likely to be exploited than 63% of all known CVEs.

References

Vendor Advisory1

corp.mediatek.com

Related Vulnerabilities

Other CWE-862 (Missing Authorization) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-39226	Critical	9.8	100%	KEV	Fix
CVE-2022-0543	Critical	10.0	100%	KEV	Fix
CVE-2021-21978	Critical	9.8	99%	-	Fix
CVE-2023-52163	High	8.8	96%	KEV	-
CVE-2022-1329	High	8.8	93%	-	-
CVE-2023-6875	Critical	9.8	90%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.