SKYWORTH SK-WR6640X: Remote code execution via unauthenticated web endpoints
Summary
The SKYWORTH SK-WR6640X Wi-Fi 6 Dual-Band Fiber Router (AX1800M), firmware V1.0.3, exposes hidden web endpoints that lack adequate access controls. According to the CVE record, a remote attacker can execute arbitrary code; the researcher writeup describes access from the adjacent network, with possible disclosure of credentials, activation of remote management and root-level access. The CVSS score is 9.8 (Critical) and no authentication or user interaction is required.
Affected
- SKYWORTH SK-WR6640X Wi-Fi 6 Dual-Band Fiber Router (AX1800M), version V1.0.3
- Other firmware versions: Unknown.
Fixed in
Unknown. No vendor advisory or fixed firmware version was found.
Workaround
Unknown from vendor sources. Interim measures recommended by the researcher and the tracker:
- Keep the web and management interface away from the internet and from guest or untrusted networks.
- Disable remote management and any WAN-side administration service.
- Change default or ISP-issued administrator credentials.
- Place the router behind a firewall and restrict inbound traffic.
Exploitation
- Exploited in the wild: Unknown. No KEV listing was found.
- CISA SSVC: Exploitation none, automatable yes, technical impact total.
- VulDB states no public exploit is available.
Our recommendation
- Verify whether the device model and firmware V1.0.3 are in use, and whether the device is customer-owned or ISP-owned.
- If ISP-owned, escalate to the ISP and ask for a firmware update or replacement device.
- If you manage the device, restrict administrative access now and disable remote management.
- Check Skyworth's support site regularly for an advisory and a fixed firmware version; do not assume a version is fixed.
- Monitor the device and your network for unusual outbound connections or configuration changes.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Researcher writeup (PRISMI-Team VulnDisclos) github.com
- VulDB entry CVE-2026-78802 vuldb.com
- Vulners Rapid7 record vulners.com
- Strix CVE record www.strix.ai
- Skyworth Digital website www.skyworthdigital.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 30 Oct 2026, 19:04.
Original description (NVD)
An issue in SKYWORTH DIGITAL CO.,LTD SK-WR6640X Wi-Fi 6 Dual-Band Fiber Router (AX1800M) V1.0.3 allows a remote attacker to execute arbitrary code.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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