How severe is CVE-2021-38526?

CVE-2021-38526 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2021-38526 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-38526?

CVE-2021-38526 primarily affects Netgear Rax35 Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-38526?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-38526 published?

CVE-2021-38526 was published on 2021-08-11 and last updated on 2026-06-17.

CVE-2021-38526

CVE-2021-38526 is a medium-severity vulnerability in Netgear Rax35 Firmware with a CVSS 3.x base score of 4.3. 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-120.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Netgear Rax35 Firmware
Published: 2021-08-11
Last modified: 2026-06-17

Description

Certain NETGEAR devices are affected by a buffer overflow by an unauthenticated attacker. This affects RAX35 before 1.0.3.94, RAX38 before 1.0.3.94, and RAX40 before 1.0.3.94.

Frequently asked questions

What is CVE-2021-38526?: Certain NETGEAR devices are affected by a buffer overflow by an unauthenticated attacker. This affects RAX35 before 1.0.3.94, RAX38 before 1.0.3.94, and RAX40 before 1.0.3.94.
How severe is CVE-2021-38526?: CVE-2021-38526 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2021-38526 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-38526?: CVE-2021-38526 primarily affects Netgear Rax35 Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-38526?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-38526 published?: CVE-2021-38526 was published on 2021-08-11 and last updated on 2026-06-17.

References

https://kb.netgear.com/000063782/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Routers-PSV-2020-0416

Affected products (3)

cpe:2.3:o:netgear:rax35_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:rax38_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:rax40_firmware:*:*:*:*:*:*:*:*

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