What is CVE-2019-6496?

CVE-2019-6496 is a high-severity vulnerability in Marvell 88w8787, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2019-01-20.

How severe is CVE-2019-6496?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Marvell 88w8787

CVE-2019-6496

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.

Vulnerability class: Buffer Overflow

Published 2019-01-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.066 (93.6th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 93.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.066 · newest: 0.066 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

www.scribd.com/document/398350818/WiFi-CVE-2019-6496-Marvell-s-Statement (Third Party Advisory)
www.securityfocus.com/bid/106865 (VDB Entry, Third Party Advisory, vdb-entry)
2018.zeronights.ru/wp-content/uploads/materials/19-Researching-Marvell-Avastar-… (Exploit, Third Party Advisory)
embedi.org/blog/remotely-compromise-devices-by-using-bugs-in-marvell-avastar-wi… (Third Party Advisory)
www.zdnet.com/article/wifi-firmware-bug-affects-laptops-smartphones-routers-gam… (Exploit, Third Party Advisory, Press/Media Coverage)
www.synology.com/security/advisory/Synology_SA_19_07 (Third Party Advisory)
www.kb.cert.org/vuls/id/730261/ (US Government Resource, Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2019-6496?: CVE-2019-6496 is a high-severity vulnerability in Marvell 88w8787, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2019-01-20.
How severe is CVE-2019-6496?: High severity. CVSS v3 base score is 8.8 out of 10.