Is there a public exploit for CVE-2026-75604?

Yes. A Metasploit module exists for CVE-2026-75604, so a working exploit is available in a standard testing framework.

Is there a proof of concept for CVE-2026-75604?

Yes — 5 proof-of-concept entries are linked on this page, from public repositories and community submissions. They are listed for authorised testing only.

How severe is CVE-2026-75604?

CVE-2026-75604 scores CVSS 9 (v3.1), rated critical. EPSS puts the chance of exploitation in the next 30 days at 2.11%.

What does CVE-2026-75604 affect?

CVE-2026-75604 affects vercel next.

9.0 Critical

Next.js is a React framework for building full-stack web applications.

CVE-2026-75604

Next.js is a React framework for building full-stack web applications. From 13.4.0 until 15.5.24 and 16.3.3, Next.js applications using Pages Router or App Router without Cache Components on Windows-hosted servers do not consistently escape backslashes in route segments before constructing incremental-cache paths. In packages/next/src/shared/lib/router/utils/escape-path-delimiters.ts and packages/next/src/server/lib/incremental-cache/file-system-cache.ts, a remote request can supply encoded Windows path separators that traverse outside the intended cache root and expose private build data, including the server-reference-manifest encryption key. Disclosure of that key can enable remote code execution in the affected application. This issue is fixed in versions 15.5.24 and 16.3.3.

A ready-made exploit module exists

Metasploit · Public PoC

Metasploitexploit/windows/http/nextjs_unauth_rce_cve_2026_75604
Public PoCZeroDayEvil/CVE-2026-75604-PoC178 stars
Public PoCrafabd1/CVE-2026-75604-poc107 stars
Public PoCe4zyy/Project-CVE-2026-756043 stars
Public PoCHackSpeak/CVE-2026-756042 stars
Public PoCFORTBRIDGE-UK/cve-2026-75604

Signals come from Exploit-DB, Metasploit, Nuclei and published proof-of-concept repositories. Their absence means nothing was found, not that nothing exists.

Assessment

CVSS: 9 (v3.1)
Severity: Critical
EPSS: 2.11% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Metasploit, Public PoC
Published: 1 September 2026
Last updated: 9 September 2026
Affected: vercel · next.js · next
Weakness: CWE-22
Assigner: security-advisories@github.com

CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

At the source

References

Community proofs of concept

No community proof of concept yet. If you have one for a published vulnerability and the right to share it, add it below — it will appear here once reviewed.

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Query this programmatically

Agents can read this through the MCP endpoint, or over HTTP:

curl https://cve.zerocrew.in/api/cve/CVE-2026-75604