What’s Vulnerable › Vulnerabilities

CVE-2021-21937

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-12-22 · updated 2026-06-17
• Weakness: CWE-89

Description

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

Affected products

• Advantech R-SeeNet: 2.4.15

References

• https://talosintelligence.com/vulnerability_reports/TALOS-2021-1366
• https://talosintelligence.com/vulnerability_reports/TALOS-2021-1366

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