CVE-2021-38523
CVE-2021-38523 is a medium-severity vulnerability in Netgear R6400 Firmware with a CVSS 3.x base score of 6.9. 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: Medium (CVSS 3.x base score 6.9)
- CVSS v2: 6.5
- EPSS exploit prediction: 1% (52nd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-787
- Affected product: Netgear R6400 Firmware
- Published:
- Last modified:
Description
NETGEAR R6400 devices before 1.0.1.70 are affected by a stack-based buffer overflow by an authenticated user.
Frequently asked questions
- What is CVE-2021-38523?
- NETGEAR R6400 devices before 1.0.1.70 are affected by a stack-based buffer overflow by an authenticated user.
- How severe is CVE-2021-38523?
- CVE-2021-38523 has a CVSS 3.x base score of 6.9, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability high.
- Is CVE-2021-38523 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-38523?
- CVE-2021-38523 affects Netgear R6400 Firmware. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-38523?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-38523 published?
- CVE-2021-38523 was published on 2021-08-11 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:o:netgear:r6400_firmware:*:*:*:*:*:*:*:*
More vulnerabilities in Netgear R6400 Firmware
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- CVE-2023-36187 — Critical (CVSS 9.8): Buffer Overflow vulnerability in NETGEAR R6400v2 before version 1.0.4.118, allows remote unauthenticated attackers to…
- CVE-2021-45617 — Critical (CVSS 9.8): Certain NETGEAR devices are affected by command injection by an unauthenticated attacker. This affects CBR40 before…
- CVE-2020-35795 — Critical (CVSS 9.8): Certain NETGEAR devices are affected by a buffer overflow by an unauthenticated attacker. This affects AC2100 before…
- CVE-2018-21162 — Critical (CVSS 9.8): Certain NETGEAR devices are affected by command injection by an unauthenticated attacker. This affects D6400 before…
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