What’s Vulnerable › Vulnerabilities

CVE-2021-38448: Trane Symbio Improper Control of Generation of Code

• Severity: high (CVSS 7.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-11-22 · updated 2026-06-17
• Weakness: CWE-94

Description

The affected controllers do not properly sanitize the input containing code syntax. As a result, an attacker could craft code to alter the intended controller flow of the software.

Affected products

• Trane Symbio 700: before 1.00.0023 — fixed in 1.00.0023
• Trane Symbio 800: before 1.30.0008; before 1.10.0010 — fixed in 1.10.0010, 1.30.0008

How to fix

Upgrade to a fixed version: Trane Symbio 700 1.00.0023; Trane Symbio 800 1.10.0010, 1.30.0008. Check the vendor advisory for mitigations.

References

• https://us-cert.cisa.gov/ics/advisories/icsa-21-266-01
• https://us-cert.cisa.gov/ics/advisories/icsa-21-266-01

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