# Microsoft Edge: A spoofing vulnerability exists when Microsoft Edge improperly handles specific HTML…

CVE record · `CVE-2018-8388`

- **Identifiers:** `CVE-2018-8388`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** microsoft
- **Technologies:** [Microsoft Edge](https://agentprime.io/advisories/technology/microsoft-edge.md)
- **Published:** 15 Aug 2018
- **Updated:** 5 Aug 2024
- **Reviewed by a person:** No

Published by the CVE Program (CNA: microsoft) at 15 Aug 2018, 17:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Affected products, as the CNA wrote them

- Vendor: Microsoft. Product: Microsoft Edge.
  - affected: `Windows 10 Version 1607 for 32-bit Systems`
  - affected: `Windows 10 Version 1607 for x64-based Systems`
  - affected: `Windows 10 Version 1703 for 32-bit Systems`
  - affected: `Windows 10 Version 1703 for x64-based Systems`
  - affected: `Windows 10 Version 1709 for 32-bit Systems`
  - affected: `Windows 10 Version 1709 for x64-based Systems`
  - affected: `Windows 10 Version 1803 for 32-bit Systems`
  - affected: `Windows 10 Version 1803 for x64-based Systems`
  - affected: `Windows Server 2016`

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

No source has published a CVSS score for this record yet.

- **CISA KEV:** Not listed.
- **EPSS:** 0.039, the 90th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 15 Aug 2018. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2018-8388](https://www.cve.org/CVERecord?id=CVE-2018-8388)
- [NVD: CVE-2018-8388](https://nvd.nist.gov/vuln/detail/CVE-2018-8388)

### References from the CNA

- <http://www.securitytracker.com/id/1041457> (vdb-entry, sectrack)
- <http://www.securityfocus.com/bid/105025> (vdb-entry, bid)
- <https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8388> (confirm)

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2018-8388>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2018-8388/>. Everything for agents: <https://agentprime.io/llms.txt>.