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Vulnerability record · CVE-2019-6496 · published 20 January 2019

CVE-2019-6496: Marvell 88w8787 firmware out-of-bounds write vulnerability

Marvell · 88w8787 Firmware

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.

8.8 CVSS 3.0 High EPSS 6.6% · top 6.4% CWE-787 · Out-of-bounds write
8.8CVSS 3.0 base score, v2 8.3
6.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
5Affected product versions listed by NVD
14References, 4 tagged exploit
17 Jun 2026Last modified by NVD

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.

CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

5 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2019-6496), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.