CVE record · CVE-2026-18051

W3 Total Cache < 2.10.5 - Unauthenticated Arbitrary Directory File Write and .htaccess Overwrite via Path Traversal in the Page Cache Key

CVSS 10.0 CriticalCriticalEPSS 0.020 · 81st percentile

Critical, because:

CVSS score 10.0: 9.0 or more.

Published by the CVE Program (CNA: WPScan) at 19 Aug 2026, 06:00 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	Product	Versions
Unknown	W3 Total Cache	affected before 2.10.5 semver Other versions: unaffected

Identifiers: CVE-2026-18051
CNA: WPScan
Weakness (CWE): CWE-22
Tags: W3 Total Cache
Path traversal
Published: 19 Aug 2026
Updated: 19 Aug 2026

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

Score	Rating	CVSS	Vector	Source
10.0	Critical	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H	ADP (CISA-ADP)

CISA KEV Not listed.
EPSS 0.020, the 81st percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

19 Aug 2026, 06:17 UTC Confirmed by NVD

Sources

References from the CNA

wpscan.com/vulnerability/dc56cdd2-419b-4a64-9d2a-29dc7e79cb6d/ exploitvdb-entrytechnical-description

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.