Is CVE-2021-26621 in the CISA KEV catalog?

No. CVE-2021-26621 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-26621?

CVE-2021-26621 has a CVSS v3 base score of 8.1 (HIGH).

What is the EPSS score for CVE-2021-26621?

CVE-2021-26621 has an EPSS score of 1.63% (73th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-26621?

Upgrade mex01 firmware to 1.9.18 or later.

CVE & CISA-KEV Catalog

CVE-2021-26621

HIGHEPSS 73th pctl

8.1

CVSS v3

NVD

Description

An Buffer Overflow vulnerability leading to remote code execution was discovered in MEX01. Remote attackers can use this vulnerability by using the property that the target program copies parameter values to memory through the strcpy() function.

CWE-120Classic Buffer Overflow

How to fix

Remediation Available

mex01 firmwareNVD

Affected:< 1.9.18Fixed in:1.9.18CVE-2021-26621derived 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 ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.63%probability of exploitation in 30 days

73rdpercentile

Elevated risk: more likely to be exploited than 73% of all known CVEs.

References

Third-Party Advisory1

krcert.or.kr

Related Vulnerabilities

Other CWE-120 (Classic Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0195	Medium	6.8	100%	-	Fix
CVE-2017-7269	Critical	9.8	100%	KEV	-
CVE-2019-11043	High	8.7	99%	KEV + Ransom	Fix
CVE-2011-4862	High	10.0	95%	-	Fix
CVE-2007-5659	High	7.8	94%	KEV	Fix
CVE-2022-3786	High	7.5	91%	-	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.