CVE-2021-34591: In Bender/ebee Charge Controllers in multiple versions are prone to Local privilege Escalation

Q: How do I fix CVE-2021-34591?

cc612 firmware: upgrade to 5.11.2, 5.12.5, 5.13.2, 5.20.2; icc15xx firmware: upgrade to 5.11.2, 5.12.5, 5.13.2, 5.20.2. Exact commands for each OS are on this page.

Q: Is CVE-2021-34591 being exploited?

CVE-2021-34591 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-34591 affect?

CVE-2021-34591 affects cc612 firmware, icc15xx firmware. Severity is high (CVSS 7.8). In Bender/ebee Charge Controllers in multiple versions are prone to Local privilege Escalation. An authenticated attacker could get root access via the suid applications socat, ip udhcpc and ifplugd.

Routine

HIGH 7.8UPGRADEUPGRADE

CVE-2021-34591 is a high-severity flaw (CVSS 7.8) affecting cc612 firmware, icc15xx firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Bender/ebee Charge Controllers in multiple versions are prone to Local privilege Escalation. An authenticated attacker could get root access via the suid applications socat, ip udhcpc and ifplugd.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 86%)
CISA exploited list	No
Weakness	CWE-250
Published	2022-04-27
Last modified	2026-06-17

Publisher (CNA): CERT VDE · Vendor: bender

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-04-27 16:15 UTCPublished CVE record published
2026-06-17 03:56 UTCUpdated Record last modified

bender cc612 firmware UPGRADE

Affected: >= 5.11.0 and < 5.11.2 · >= 5.12.0 and < 5.12.5 · >= 5.13.0 and < 5.13.2 · >= 5.20.0 and < 5.20.2

Fixed in: 5.11.2, 5.12.5, 5.13.2, 5.20.2

Safe to downgrade to: a release before 5.11.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

bender icc15xx firmware UPGRADE

Affected: >= 5.11.0 and < 5.11.2 · >= 5.12.0 and < 5.12.5 · >= 5.13.0 and < 5.13.2 · >= 5.20.0 and < 5.20.2

Fixed in: 5.11.2, 5.12.5, 5.13.2, 5.20.2

Safe to downgrade to: a release before 5.11.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-34591?

cc612 firmware: upgrade to 5.11.2, 5.12.5, 5.13.2, 5.20.2; icc15xx firmware: upgrade to 5.11.2, 5.12.5, 5.13.2, 5.20.2. Exact commands for each OS are on this page.

Is CVE-2021-34591 being exploited?

CVE-2021-34591 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-34591 affect?

CVE-2021-34591 affects cc612 firmware, icc15xx firmware. Severity is high (CVSS 7.8). In Bender/ebee Charge Controllers in multiple versions are prone to Local privilege Escalation. An authenticated attacker could get root access via the suid applications socat, ip udhcpc and ifplugd.

How urgent is CVE-2021-34591?

Priority 31/100. High severity

Related CVEs

CVE-2021-34602 HIGH 8.8 UPGRADE UPGRADE In Bender/ebee Charge Controllers in multiple versions are prone to Command injection via Web interface
CVE-2021-34601 CRITICAL 9.8 UPGRADE UPGRADE In Bender/ebee Charge Controllers in multiple versions are prone to Hardcoded Credentials
CVE-2021-34592 HIGH 8.8 UPGRADE UPGRADE In Bender/ebee Charge Controllers in multiple versions are prone to Command injection via Web interface
CVE-2021-34590 MEDIUM 5.4 UPGRADE UPGRADE In Bender/ebee Charge Controllers in multiple versions are prone to Cross-site Scripting
CVE-2021-34589 HIGH 7.5 UPGRADE UPGRADE In Bender/ebee Charge Controllers in multiple versions are prone to an RFID leak

References

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