CVE & CISA-KEV Catalog

CVE-2021-45637

HIGH
8.3
CVSS v3
NVD

Description

Certain NETGEAR devices are affected by a stack-based buffer overflow by an unauthenticated attacker. This affects R6260 before 1.1.0.76, R6800 before 1.2.0.62, R6700v2 before 1.2.0.62, R6900v2 before 1.2.0.62, R7450 before 1.2.0.62, AC2100 before 1.2.0.62, AC2400 before 1.2.0.62, and AC2600 before 1.2.0.62.

CWE-787Out-of-bounds Write

How to fix

Remediation Available
ac2100 firmwareNVD
Affected:< 1.2.0.62Fixed in:1.2.0.62CVE-2021-45637derived from NVD
ac2400 firmwareNVD
Affected:< 1.2.0.62Fixed in:1.2.0.62CVE-2021-45637derived from NVD
ac2600 firmwareNVD
Affected:< 1.2.0.62Fixed in:1.2.0.62CVE-2021-45637derived from NVD
r6260 firmwareNVD
Affected:< 1.1.0.76Fixed in:1.1.0.76CVE-2021-45637derived from NVD
r6700v2 firmwareNVD
Affected:< 1.2.0.62Fixed in:1.2.0.62CVE-2021-45637derived from NVD
r6800 firmwareNVD
Affected:< 1.2.0.62Fixed in:1.2.0.62CVE-2021-45637derived from NVD
r6900v2 firmwareNVD
Affected:< 1.2.0.62Fixed in:1.2.0.62CVE-2021-45637derived from NVD
r7450 firmwareNVD
Affected:< 1.2.0.62Fixed in:1.2.0.62CVE-2021-45637derived 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
ScopeUnchanged

Impact

ConfidentialityHigh
IntegrityHigh
AvailabilityLow

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

Exploit Intelligence

1.20%probability of exploitation in 30 days
64thpercentile

Moderate risk: more likely to be exploited than 64% 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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CVE-2021-45637 severity badge

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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.