CVE-2019-6496

Severity: high (CVSS 8.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 6.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2019-01-20 · updated 2026-06-17
Weakness: CWE-787

Description

The ThreadX-based firmware on Marvell Avastar Wi-Fi devices, models 88W8787, 88W8797, 88W8801, 88W8897, and 88W8997, allows remote attackers to execute arbitrary code or cause a denial of service (block pool overflow) via malformed Wi-Fi packets during identification of available Wi-Fi networks. Exploitation of the Wi-Fi device can lead to exploitation of the host application processor in some cases, but this depends on several factors including host OS hardening and the availability of DMA.

Affected products

Marvell 88W8787 Firmware: all versions
Marvell 88W8797 Firmware: all versions
Marvell 88W8801 Firmware: all versions
Marvell 88W8897 Firmware: all versions
Marvell 88W8997 Firmware: all versions

References

http://www.securityfocus.com/bid/106865
https://2018.zeronights.ru/wp-content/uploads/materials/19-Researching-Marvell-Avastar-Wi-Fi.pdf
https://embedi.org/blog/remotely-compromise-devices-by-using-bugs-in-marvell-avastar-wi-fi-from-zero-knowledge-to-zero-click-rce/
https://www.kb.cert.org/vuls/id/730261/
https://www.scribd.com/document/398350818/WiFi-CVE-2019-6496-Marvell-s-Statement
https://www.synology.com/security/advisory/Synology_SA_19_07
https://www.zdnet.com/article/wifi-firmware-bug-affects-laptops-smartphones-routers-gaming-devices/
http://www.securityfocus.com/bid/106865
https://2018.zeronights.ru/wp-content/uploads/materials/19-Researching-Marvell-Avastar-Wi-Fi.pdf
https://embedi.org/blog/remotely-compromise-devices-by-using-bugs-in-marvell-avastar-wi-fi-from-zero-knowledge-to-zero-click-rce/
https://www.kb.cert.org/vuls/id/730261/
https://www.scribd.com/document/398350818/WiFi-CVE-2019-6496-Marvell-s-Statement

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