CVE-2021-45638
CVE-2021-45638 is a critical-severity vulnerability in Netgear D6220 Firmware with a CVSS 3.x base score of 9.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: Critical (CVSS 3.x base score 9.6)
- CVSS v2: 7.5
- EPSS exploit prediction: 1% (71st percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-787
- Affected product: Netgear D6220 Firmware
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2021-45638?
- 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.
- How severe is CVE-2021-45638?
- CVE-2021-45638 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-45638 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-45638?
- CVE-2021-45638 primarily affects Netgear D6220 Firmware. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2021-45638?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2021-45638 published?
- CVE-2021-45638 was published on 2021-12-26 and last updated on 2026-06-17.
References
Affected products (14)
- cpe:2.3:o:netgear:d6220_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:d6400_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:d7000v2_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:d8500_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:dc112a_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:r6300v2_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:r6400_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:r7000_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:r7100lg_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:r7000p_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:rbs40v_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:rbw30_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:rs400_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:r6900p_firmware:*:*:*:*:*:*:*:*
More vulnerabilities in Netgear D6220 Firmware
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