Is CVE-2021-34587 in the CISA KEV catalog?

No. CVE-2021-34587 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-34587?

CVE-2021-34587 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2021-34587?

CVE-2021-34587 has an EPSS score of 0.85% (54th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-34587?

Upgrade cc612 firmware to 5.20.2 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2021-34587

MEDIUM

5.3

CVSS v3

NVD

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.

CWE-121Stack-based Buffer Overflow CWE-787Out-of-bounds Write

How to fix

Remediation Available

cc612 firmwareNVD

Affected:>= 5.20.0, < 5.20.2Fixed in:5.20.2CVE-2021-34587derived from NVD

cc613 firmwareNVD

Affected:>= 5.20.0, < 5.20.2Fixed in:5.20.2CVE-2021-34587derived from NVD

icc15xx firmwareNVD

Affected:>= 5.20.0, < 5.20.2Fixed in:5.20.2CVE-2021-34587derived from NVD

icc16xx firmwareNVD

Affected:>= 5.20.0, < 5.20.2Fixed in:5.20.2CVE-2021-34587derived 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 VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityLow

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

Exploit Intelligence

0.85%probability of exploitation in 30 days

54thpercentile

Moderate risk: more likely to be exploited than 54% of all known CVEs.

References

Third-Party Advisory1

cert.vde.com

Related Vulnerabilities

Other CWE-121 (Stack-based Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2009-0927	High	8.8	97%	KEV	Fix
CVE-2020-10924	High	8.8	87%	-	-
CVE-2022-20705	Critical	10.0	80%	-	-

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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.