Vulnerability · Published Aug 5, 2021 · Assigned by talos

CVE-2021-21805

Critical 9.8

In plain English

A critical-severity OS command injection in Advantech. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 69.6% (higher than 99.4% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei.

Severity (CVSS 3.0)9.8Critical

Exploit odds (30 days)69.6%top 0.6% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack tooling1Nuclei

Official 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 (as reported)

Vendor	Product	Versions
n/a	Advantech	Advantech R-SeeNet 2.4.12 (20.10.2020)

Weakness: CWE-78 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

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