CVE-2021-21936

Name: CVE-2021-21936
Creator: NVD / NIST
Published: 2021-12-22T19:15:10.987+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 1.38%

Last modified Jun 17, 2026

CVE-2021-21936 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A specially-crafted HTTP request can lead to SQL injection. An attacker can make authenticated HTTP requests to trigger this vulnerability at ‘health_alt_filter’ parameter. EPSS estimates a 1.38% chance of exploitation in the next 30 days.

Description

A specially-crafted HTTP request can lead to SQL injection. An attacker can make authenticated HTTP requests to trigger this vulnerability at ‘health_alt_filter’ parameter. This can be done as any authenticated user or through cross-site request forgery.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.38%

68.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Advantech	R-Seenet	2.4.15

References

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1366Exploit, Third Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1366Exploit, Third Party Advisory

Timeline

Published: Dec 22, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-21936?

How severe is CVE-2021-21936?

CVE-2021-21936 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.38% probability of exploitation in the next 30 days.

How do I fix CVE-2021-21936?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-21936?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST