CVE-2021-21805

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 69.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-08-05 · updated 2026-06-17
Weakness: CWE-78

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.

Affected products

Advantech R-SeeNet: 2.4.12

References

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1274
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1274

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