CVE-2019-6496 json
The ThreadX-based firmware on Marvell Avastar Wi-Fi devices, models 88W8787, 88W8797, 88W8801, 88W8897, and 88W8997, allows remote attacker…
published 2019-01-19 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-16056
- cvss
- 8.8
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 6.6%
- EPSS 6.6% chance of exploitation in 30 days, percentile 93%
- public exploits
- 0
- none known
Summary
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.
Exploit prediction
6.62% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- 2018.zeronights.ru https://2018.zeronights.ru/wp-content/uploads/materials/19-Researching-Marvell-Avastar-Wi-Fi.pdf referenced PoC, tagged "exploit" by a source, unverified
- zdnet.com https://www.zdnet.com/article/wifi-firmware-bug-affects-laptops-smartphones-routers-gaming-devices/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 8.8 | CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 8.3 | AV:A/AC:L/Au:N/C:C/I:C/A:C |
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
-
2018.zeronights.ru
/wp-content/uploads/materials/19-Researching-Marvell-Avastar-Wi-Fi.pdf
exploit, third-party-advisory
-
zdnet.com
/article/wifi-firmware-bug-affects-laptops-smartphones-routers-gaming-devices/
exploit, press/media-coverage, third-party-advisory
-
scribd.com
/document/398350818/WiFi-CVE-2019-6496-Marvell-s-Statement
third-party-advisory
-
securityfocus.com
/bid/106865
vdb-entry, third-party-advisory
-
embedi.org
/blog/remotely-compromise-devices-by-using-bugs-in-marvell-avastar-wi-fi-from-zero-knowledge-to-zero-click-rce
third-party-advisory
-
synology.com
/security/advisory/Synology_SA_19_07
third-party-advisory
-
kb.cert.org
/vuls/id/730261/
third-party-advisory, us-government-resource
Sources
- CVE List CVE-2019-6496
- NVD CVE-2019-6496
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.