cve recordzero dayexploit reported

CVE-2017-20284

CVSS—

Severitynone

Weakness—

EPSS1.2%67.6th percentile

Exploited1 KEV source

patch window

Called exploited the same day it was disclosed.

Measured from the CVE publication date to the earliest of 1 KEV catalogue that list it.

The life of this vulnerability

CVE reservedSep 18, 2026
CVE publishedSep 18, 2026same day
First KEV listingSep 18, 2026same day
Last sightingSep 18, 2026same day

Gaps are compressed to equal steps. The elapsed time is printed under each.

Which catalogues call it exploited

CISA KEVUS federaldoes not list it
EUVDENISA, European Uniondoes not list it
VulnCheck KEVcommercial researchlisted Sep 18, 2026
CIRCLaggregator, mirrors the abovelisted Sep 18, 2026, not counted

Sources1 of 3

Listings differ by—

Strongest claimconfirmed

This rests on a single catalogue. No second catalogue corroborates the claim that it is being exploited. CIRCL is an aggregator and is not counted.

Public exploitation evidence

reported exploitationSep 18, 2026previdian.com/CVE-2017-20284
reported exploitationSep 18, 2026www.cve.org/CVERecord?id=CVE-2017-20284

2 public reports collected from VulnCheck and CIRCL, first on Sep 18, 2026. Each links to its original source. We have not verified them.

Description

References

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Our coverage of CVE-2017-20284

CVE-2017-20284Oct 2, 2026high

Caucho Resin Path Traversal Flaw Exploited Same Day as Disclosure

CVE-2017-20284, a path traversal vulnerability in Caucho Technology's Resin, was reported as exploited on the same day it was published. VulnCheck lists it as exploited, but CISA and EUVD do not.

CVE-2017-20284Sep 20, 2026high

CVE-2017-20284 Exploited Same Day as Publication

A path traversal vulnerability, CVE-2017-20284, was reported as exploited on the same day it was published. The flaw is listed in the VulnCheck KEV catalogue but not in CISA or EUVD catalogues.