CVE-2021-38448

Trane Symbio Improper Control of Generation of Code

HIGH

7.6

CVSS Score

Published: November 22, 2021 at 06:58 PM UTC

Updated: June 17, 2026 at 04:02 AM UTC

6 products affected across 1 vendorSymbio 800Symbio 700Intellipak 2

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Severity

HIGH7.6

Exploit prediction

EPSS 0.3%

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Symbio 700 · Trane

95%

v < 1.00.0023700 ≤ v < 1.00.0023800 ≤ v < 1.00.0007700 800

Affected range stops below 1.00.0007, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.00.0023, so it looks safe — our inference, not a vendor statement

trane-odyssey-split-systems (environment)

Symbio 800 · Trane

95%

v < 1.10.0010v < 1.30.0008700 ≤ v < 1.00.0023800 ≤ v < 1.00.0007700 800

Affected range stops below 1.00.0007, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.00.0023, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.10.0010, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.30.0008, so it looks safe — our inference, not a vendor statement

trane-ascend-air-cooled-chiller-acr (environment) · trane-intellipak-1 (environment) · trane-intellipak-2 (environment)

Ascend Air-Cooled Chiller Acr · Tranedevice

80%

All versions

Intellipak 1 · Tranedevice

80%

All versions

Intellipak 2 · Tranedevice

80%

All versions

Odyssey Split Systems · Tranedevice

80%

All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

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

References (1)

x_refsource_CONFIRMMitigationThird Party AdvisoryUS Government Resource

Source: [email protected]

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

CVSS

7.6HIGH[email protected]

Attack Vector: PHYSICAL
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: CHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-94

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