Skip to content

CVE-2024-20399

CVE

Threat entity extracted from intelligence sources

Frequency
2
occurrences
First Seen
November 10, 2025
Last Seen
June 24, 2026
API
Exploited in Wild
Ransomware Use
Public Exploits
Attack Vector

Vulnerability Overview

Exploitation Activity

Exploitation Intelligence

Operation Highland, attributed to the Velvet Ant cyberespionage group, involved a sophisticated attack that began in 2016 and persisted undetected for a decade. The attackers hijacked the authentication stack of a major organization's isolated network, allowing them full visibility into administrati...

A critical vulnerability in Cisco's Identity Services Engine (ISE), tracked as CVE-2024-20399, allows unauthenticated remote attackers to trigger system restarts, leading to denial-of-service conditions. The flaw affects ISE versions 3.4.0 through 3.4 Patch 3 and can be exploited by sending speciall...

A critical denial-of-service vulnerability in Cisco's Identity Services Engine (ISE) has been identified, allowing unauthenticated attackers to crash the system. The flaw, tracked as CVE-2024-20399, affects ISE versions 3.4.0 through 3.4 Patch 3 and can be exploited by sending specially crafted RADI...

Public Exploits

Checking GitHub for proof-of-concept code…