Is CVE-2022-20842 in the CISA KEV catalog?

No. CVE-2022-20842 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-20842?

CVE-2022-20842 has a CVSS v3 base score of 9.0 (CRITICAL).

What is the EPSS score for CVE-2022-20842?

CVE-2022-20842 has an EPSS score of 1.61% (73th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-20842?

Upgrade rv340 firmware to 1.0.03.28 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2022-20842

CRITICALEPSS 73th pctl

9.0

CVSS v3

NVD

Description

Multiple vulnerabilities in Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers could allow an unauthenticated, remote attacker to execute arbitrary code or cause a denial of service (DoS) condition on an affected device. For more information about these vulnerabilities, see the Details section of this advisory.

CWE-120Classic Buffer Overflow CWE-20Improper Input Validation

How to fix

Remediation Available

rv340 firmwareNVD

Affected:< 1.0.03.28Fixed in:1.0.03.28CVE-2022-20842derived from NVD

rv340w firmwareNVD

Affected:< 1.0.03.28Fixed in:1.0.03.28CVE-2022-20842derived from NVD

rv345 firmwareNVD

Affected:< 1.0.03.28Fixed in:1.0.03.28CVE-2022-20842derived from NVD

rv345p firmwareNVD

Affected:< 1.0.03.28Fixed in:1.0.03.28CVE-2022-20842derived 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

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.61%probability of exploitation in 30 days

73rdpercentile

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

References

Vendor Advisory1

tools.cisco.com

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.