CVE-2021-21805

PoC —

CVSS 3.1

9.8 critical

EPSS

70%p99

Published

Aug 5, 2021 (Aug 5, 2021)

Modified

Jun 17, 2026

Description

An OS Command Injection vulnerability exists in the ping.php script functionality of Advantech R-SeeNet v 2.4.12 (20.10.2020). A specially crafted HTTP request can lead to arbitrary OS command execution. An attacker can send a crafted HTTP request to trigger this vulnerability.

Vendors: advantech
Products: r-seenet
Weakness: CWE-78
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (69.8%)

In the news2 stories

Experts disclose critical flaws in Advantech router monitoring tool

Security AffairsJul 19, 17:53 UTC · Jul 19, 2021Exploit / PoC in the wildCVE-2021-21799 CVE-2021-21800 CVE-2021-21801+3 CVEs

Vulnerability Spotlight: Multiple vulnerabilities in Advantech R

Cisco TalosJul 15, 14:27 UTC · Jul 15, 2021Vulnerability in the wildCVE-2021-21799 CVE-2021-21800 CVE-2021-21801+3 CVEs