cve recordexploit reported

CVE-2021-24139

CVSS—

Severitynone

Weakness—

EPSS5.5%92.8th percentile

Exploited1 KEV source

patch window

Called exploited 677 days after disclosure.

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

The life of this vulnerability

CVE publishedMar 18, 2021
First KEV listingJan 24, 20231.9y
Last sightingAug 7, 20263.5y

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 Jan 24, 2023
CIRCLaggregator, mirrors the abovedoes not list it

Sources1 of 3

Listings differ by—

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 exploitationAug 7, 2026www.recordedfuture.com/blog/july-2026-cve-landscape
reported exploitationJul 24, 2026www.hkcert.org/security-bulletin/multiple-vulnerabilities-in
reported exploitationJul 23, 2026www.group-ib.com/blog/jadeprox-china-nexus-triback-loader/
reported exploitationJan 24, 2023www.wordfence.com/threat-intel/vulnerabilities/wordpress-plu

4 public reports collected from VulnCheck and CIRCL, first on Jan 24, 2023. Each links to its original source. We have not verified them.

Description

References

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Our coverage of CVE-2021-24139

CVE-2008-4128Aug 7, 2026high

July 2026 CVE Landscape

Cybersecurity researchers identified 85 high-impact vulnerabilities in July 2026 that require urgent remediation, marking a 44% increase from the previous month. Of these, 36 were assigned a "Very Critical" risk score by Insikt Group. The vulnerabilities affected products from 61 vendors, with Microsoft accounting for approximately 12% of the total.