Microsoft Edge (Chromium-based): Remote code execution via type confusion
Summary
A type confusion flaw (CWE-843) in Microsoft Edge (Chromium-based) allows an unauthenticated remote attacker to execute code. The attacker must host a specially crafted web page and get a user to visit it with an affected Edge version. Successful exploitation could allow code execution within the browser renderer process, and MSRC does not state whether a sandbox escape is also required.
Affected
- Microsoft Edge (Chromium-based) from 1.0.0.0 before 154.0.4258.48 (per the official CVE record)
Fixed in
- Microsoft Edge 154.0.4258.48 or later (build listed by third-party sources; verify against the MSRC advisory before using it in patch rules)
Workaround
Unknown.
Exploitation
- Not known to be exploited in the wild (OffSeq; not listed in CISA KEV at the time of research)
- No public exploit code found (ThehackerWire)
- CISA SSVC: Exploitation none, Automatable no, Technical Impact total
Our recommendation
- Update Microsoft Edge to the fixed build on all Windows endpoints, using auto-update, Intune, WSUS or another update management tool.
- Check the installed Edge version on all devices, including rarely restarted laptops, and confirm the fixed build in the MSRC advisory first.
- Remind staff to avoid untrusted links and websites until the update is installed.
- Monitor for unusual browser crashes or unexpected code execution on endpoints.
Information from Microsoft (Patch Tuesday October 2026)
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Microsoft Security Response Center: CVE-2026-85898 msrc.microsoft.com
- OffSeq Radar: CVE-2026-85898 radar.offseq.com
- ThehackerWire: CVE-2026-85898 www.thehackerwire.com
- VulDB: CVE-2026-85898 vuldb.com
- Strix AI: CVE-2026-85898 www.strix.ai
- ThreatInt CVE record: CVE-2026-85898 cve.threatint.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 31 Oct 2026, 10:07.
Original description (NVD)
Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
NVD references (1)
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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