CVE-2026-20452

Description

In wlan AP driver, there is a possible memory corruption due to a heap buffer overflow. This could lead to remote (proximal/adjacent) code execution with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00480138; Issue ID: MSV-6295.

CVSS v3.1 Score

8.0

HIGH

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

EPSS — Exploit Prediction

0.0023

Probability of exploitation

0.14%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-122 CWE-122

Affected Products

Vendor	Product	Versions
mediatek	mt6890_firmware	All
mediatek	mt6890	All
mediatek	mt7615_firmware	All
mediatek	mt7615	All
mediatek	mt7915_firmware	All
mediatek	mt7915	All
mediatek	mt7916_firmware	All
mediatek	mt7916	All
mediatek	mt7981_firmware	All
mediatek	mt7981	All
mediatek	mt7986_firmware	All
mediatek	mt7986	All
mediatek	mt7990_firmware	All
mediatek	mt7990	All
mediatek	mt7992_firmware	All
mediatek	mt7992	All
mediatek	mt7993_firmware	All
mediatek	mt7993	All

References

Advisories & Patches

https://corp.mediatek.com/product-security-bulletin/June-2026

Frequently Asked Questions

What is CVE-2026-20452? +

In wlan AP driver, there is a possible memory corruption due to a heap buffer overflow. This could lead to remote (proximal/adjacent) code execution with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00480138; Issue ID: MSV-6295. It has a CVSS v3.1 base score of 8.0 (HIGH).

How severe is CVE-2026-20452? +

CVE-2026-20452 has a CVSS v3.1 score of 8.0 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0023, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-20452? +

CVE-2026-20452 affects products from mediatek, specifically: mt6890, mt6890_firmware, mt7615, mt7615_firmware, mt7915, mt7915_firmware, mt7916, mt7916_firmware, mt7981, mt7981_firmware, mt7986, mt7986_firmware, mt7990, mt7990_firmware, mt7992, mt7992_firmware, mt7993, mt7993_firmware. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-20452? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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