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CVE-2026-40021

CVE

Threat entity extracted from intelligence sources

Frequency
4
occurrences
First Seen
October 16, 2026
Last Seen
October 16, 2026
API
Exploited in Wild
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Ransomware Use
—
Public Exploits
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Attack Vector
—

Vulnerability Overview

Exploitation Activity

Exploitation Intelligence

Multiple Denial of Service vulnerabilities have been identified in log4net and NAnt affecting Fedora 43 and 44. The vulnerabilities include CVE-2026-40021, published on April 10, 2026, which allows for logging denial of service via unsanitized XML characters, and three additional CVEs (CVE-2026-1052...

Public Exploits

Checking GitHub for proof-of-concept code…