Is CVE-2022-4873 in the CISA KEV catalog?

No. CVE-2022-4873 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-4873?

CVE-2022-4873 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2022-4873?

CVE-2022-4873 has an EPSS score of 7.17% (94th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-4873?

Upgrade nf20 firmware to r6b025 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2022-4873

CRITICALEPSS 94th pctl

9.8

CVSS v3

NVD

Description

On Netcomm router models NF20MESH, NF20, and NL1902 a stack based buffer overflow affects the sessionKey parameter. By providing a specific number of bytes, the instruction pointer is able to be overwritten on the stack and crashes the application at a known location.

CWE-787Out-of-bounds Write

How to fix

Remediation Available

nf20 firmwareNVD

Affected:< r6b025Fixed in:r6b025CVE-2022-4873derived from NVD

nf20mesh firmwareNVD

Affected:< r6b025Fixed in:r6b025CVE-2022-4873derived from NVD

nl1902 firmwareNVD

Affected:< r6b025Fixed in:r6b025CVE-2022-4873derived 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

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

7.17%probability of exploitation in 30 days

94thpercentile

High risk: more likely to be exploited than 94% of all known CVEs.

References

Exploit1

github.com

Other references1

kb.cert.org

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) 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-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2023-4863	High	8.8	100%	KEV	Fix
CVE-2020-16040	Medium	6.5	100%	-	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 2025-11-04.