CVE-2021-34587: Bender Charge Controller: Long URL could lead to webserver crash

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-04-27 · updated 2026-06-17
Weakness: CWE-121

Description

In Bender/ebee Charge Controllers in multiple versions a long URL could lead to webserver crash. The URL is used as input of an sprintf to a stack variable.

Affected products

Bender Cc612 Firmware: from 5.11.0 before 5.11.2; from 5.12.0 before 5.12.5; from 5.13.0 before 5.13.2; from 5.20.0 before 5.20.2 — fixed in 5.11.2, 5.12.5, 5.13.2, 5.20.2
Bender Cc613 Firmware: from 5.11.0 before 5.11.2; from 5.12.0 before 5.12.5; from 5.13.0 before 5.13.2; from 5.20.0 before 5.20.2 — fixed in 5.11.2, 5.12.5, 5.13.2, 5.20.2
Bender Icc15Xx Firmware: from 5.11.0 before 5.11.2; from 5.12.0 before 5.12.5; from 5.13.0 before 5.13.2; from 5.20.0 before 5.20.2 — fixed in 5.11.2, 5.12.5, 5.13.2, 5.20.2
Bender Icc16Xx Firmware: from 5.11.0 before 5.11.2; from 5.12.0 before 5.12.5; from 5.13.0 before 5.13.2; from 5.20.0 before 5.20.2 — fixed in 5.11.2, 5.12.5, 5.13.2, 5.20.2
IBM Ibm Rational Lifecycle Integration Adapter For Windchill: 1.0.0

How to fix

Upgrade to a fixed version: Bender Cc612 Firmware 5.11.2, 5.12.5, 5.13.2, 5.20.2; Bender Cc613 Firmware 5.11.2, 5.12.5, 5.13.2, 5.20.2; Bender Icc15Xx Firmware 5.11.2, 5.12.5, 5.13.2, 5.20.2; Bender Icc16Xx Firmware 5.11.2, 5.12.5, 5.13.2, 5.20.2. Check the vendor advisory for mitigations.

References

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