HOMEVULNERABILITIESCVE-2019-6496
HIGH

CVE-2019-6496

CWE-787Published: January 20, 2019· Updated: Jun 17, 2026

8.8
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2019-6496 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorAdjacent
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

marvell10 product(s)
88w8787 firmware88w878788w8797 firmware88w879788w8801 firmware88w880188w8897 firmware88w889788w8997 firmware88w8997
Source: NVD CPE · 10 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

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

All References (14)

→
http://www.securityfocus.com/bid/106865Third Party Advisory · VDB Entry
→
https://2018.zeronights.ru/wp-content/uploads/materials/19-Researching-Marvell-Avastar-Wi-Fi.pdfExploit · Third Party Advisory
→
https://embedi.org/blog/remotely-compromise-devices-by-using-bugs-in-marvell-avastar-wi-fi-from-zero-knowledge-to-zero-click-rce/Third Party Advisory
→
https://www.kb.cert.org/vuls/id/730261/Third Party Advisory · US Government Resource
→
https://www.scribd.com/document/398350818/WiFi-CVE-2019-6496-Marvell-s-StatementThird Party Advisory
→
https://www.synology.com/security/advisory/Synology_SA_19_07Third Party Advisory
→
https://www.zdnet.com/article/wifi-firmware-bug-affects-laptops-smartphones-routers-gaming-devices/Exploit · Press/Media Coverage · Third Party Advisory
→
http://www.securityfocus.com/bid/106865Third Party Advisory · VDB Entry
→
https://2018.zeronights.ru/wp-content/uploads/materials/19-Researching-Marvell-Avastar-Wi-Fi.pdfExploit · Third Party Advisory
→
https://embedi.org/blog/remotely-compromise-devices-by-using-bugs-in-marvell-avastar-wi-fi-from-zero-knowledge-to-zero-click-rce/Third Party Advisory
→
https://www.kb.cert.org/vuls/id/730261/Third Party Advisory · US Government Resource
→
https://www.scribd.com/document/398350818/WiFi-CVE-2019-6496-Marvell-s-StatementThird Party Advisory
→
https://www.synology.com/security/advisory/Synology_SA_19_07Third Party Advisory
→
https://www.zdnet.com/article/wifi-firmware-bug-affects-laptops-smartphones-routers-gaming-devices/Exploit · Press/Media Coverage · Third Party Advisory

Quick Facts

CVE IDCVE-2019-6496
CVSS Score8.8 / 10
SeverityHIGH
WeaknessCWE-787
CISA KEVNo
Affected1 vendor(s)
PublishedJan 20, 2019

Related CVEs (CWE-787)

CVE-2004-0574
10.0
CVE-2019-6235
10.0
CVE-2019-5684
10.0
CVE-2019-5049
10.0
CVE-2018-3991
10.0
CVE-2009-2466
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-6496 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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