CVE & CISA-KEV Catalog

CVE-2021-45638

CRITICALEPSS 71th pctl
9.6
CVSS v3
NVD

Description

Certain NETGEAR devices are affected by a stack-based buffer overflow by an unauthenticated attacker. This affects D6220 before 1.0.0.68, D6400 before 1.0.0.102, D7000v2 before 1.0.0.74, D8500 before 1.0.3.60, DC112A before 1.0.0.56, R6300v2 before 1.0.4.50, R6400 before 1.0.1.68, R7000 before 1.0.11.116, R7100LG before 1.0.0.70, RBS40V before 2.6.2.8, RBW30 before 2.6.2.2, RS400 before 1.5.1.80, R7000P before 1.3.2.132, and R6900P before 1.3.2.132.

CWE-787Out-of-bounds Write

How to fix

Remediation Available
d6220 firmwareNVD
Affected:< 1.0.0.68Fixed in:1.0.0.68CVE-2021-45638derived from NVD
d6400 firmwareNVD
Affected:< 1.0.0.102Fixed in:1.0.0.102CVE-2021-45638derived from NVD
d7000v2 firmwareNVD
Affected:< 1.0.0.74Fixed in:1.0.0.74CVE-2021-45638derived from NVD
d8500 firmwareNVD
Affected:< 1.0.3.60Fixed in:1.0.3.60CVE-2021-45638derived from NVD
dc112a firmwareNVD
Affected:< 1.0.0.56Fixed in:1.0.0.56CVE-2021-45638derived from NVD
r6300v2 firmwareNVD
Affected:< 1.0.4.50Fixed in:1.0.4.50CVE-2021-45638derived from NVD
r6400 firmwareNVD
Affected:< 1.0.1.68Fixed in:1.0.1.68CVE-2021-45638derived from NVD
r6900p firmwareNVD
Affected:< 1.3.2.132Fixed in:1.3.2.132CVE-2021-45638derived from NVD
r7000 firmwareNVD
Affected:< 1.0.11.116Fixed in:1.0.11.116CVE-2021-45638derived from NVD
r7000p firmwareNVD
Affected:< 1.3.2.132Fixed in:1.3.2.132CVE-2021-45638derived from NVD
r7100lg firmwareNVD
Affected:< 1.0.0.70Fixed in:1.0.0.70CVE-2021-45638derived from NVD
rbs40v firmwareNVD
Affected:< 2.6.2.8Fixed in:2.6.2.8CVE-2021-45638derived from NVD
rbw30 firmwareNVD
Affected:< 2.6.2.2Fixed in:2.6.2.2CVE-2021-45638derived from NVD
rs400 firmwareNVD
Affected:< 1.5.1.80Fixed in:1.5.1.80CVE-2021-45638derived 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 VectorAdjacent
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeChanged

Impact

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

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

Exploit Intelligence

1.47%probability of exploitation in 30 days
71stpercentile

Elevated risk: more likely to be exploited than 71% of all known CVEs.

References

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2025-22457Critical9.0100%KEV + RansomFix
CVE-2025-0282Critical9.0100%KEV + Ransom-
CVE-2015-3113Critical9.8100%KEVFix
CVE-2021-20038Critical9.8100%KEV + Ransom-
CVE-2023-4863High8.8100%KEVFix
CVE-2020-16040Medium6.5100%-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.