Is CVE-2021-34591 in the CISA KEV catalog?

No. CVE-2021-34591 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-34591?

CVE-2021-34591 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2021-34591?

CVE-2021-34591 has an EPSS score of 0.22% (13th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-34591?

Upgrade cc612 firmware to 5.20.2 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2021-34591

HIGH

7.8

CVSS v3

NVD

Description

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.

CWE-250

How to fix

Remediation Available

cc612 firmwareNVD

Affected:>= 5.20.0, < 5.20.2Fixed in:5.20.2CVE-2021-34591derived from NVD

icc15xx firmwareNVD

Affected:>= 5.20.0, < 5.20.2Fixed in:5.20.2CVE-2021-34591derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.22%probability of exploitation in 30 days

13thpercentile

Low risk: more likely to be exploited than 13% of all known CVEs.

References

Vendor Advisory1

cert.vde.com

Related Vulnerabilities

Other CWE-250 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-1222	High	8.6	64%	-	Fix
CVE-2025-12420	Critical	9.8	45%	-	Fix
CVE-2024-38813	High	7.5	17%	KEV	Fix
CVE-2025-34515	Critical	9.8	7.3%	-	-
CVE-2026-29205	High	8.6	7.2%	-	-
CVE-2019-16765	High	7.4	4.7%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.