CVE-2021-38448

7.5 HIGH 0.3% exploit odds Fix listed

What it is

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.

At a glance

Exploitability: Can be exploited with physical access without logging in. High risk of data tampering, service disruption.
Exploit odds: 0.3% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2021-11-22 19:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 04:02 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.3% in the next 30 days (EPSS).
Severity: 7.5 HIGH (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2021-11-22 19:15 UTC
Last modified: 2026-06-17 04:02 UTC
Exploit probability: 0.3% · EPSS, next 30 days
Weakness: CWE-94 · Code injection
Record status: Modified

Affected

Trane Symbio 700 < 1.00.0023
Trane Symbio 800 < 1.30.0008
Trane Symbio 800 < 1.10.0010

Attack profile CVSS 3.1 · 7.5

Attack vector: Physical
Complexity: Low
Privileges needed: None
User interaction: None
Scope: Changed
Confidentiality: Low
Integrity: High
Availability: High

Raw vector

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

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2021-38448.md and follow it. Check whether this project is affected by CVE-2021-38448. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record