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Vulnerability record · CVE-2022-27646 · published 29 March 2023

CVE-2022-27646: Netgear r6400 firmware stack-based buffer overflow vulnerability

Netgear · R6400 Firmware

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6700v3 1.0.4.120_10.0.91 routers. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the circled daemon. A crafted circleinfo.txt file can trigger an overflow of a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-15879.

8.8 CVSS 3.1 High EPSS 1.4% · top 27.8% CWE-121 · Stack-based buffer overflow
8.8CVSS 3.1 base score
1.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
24Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6700v3 1.0.4.120_10.0.91 routers. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the circled daemon. A crafted circleinfo.txt file can trigger an overflow of a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-15879.

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

Affected products

24 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://kb.netgear.com/000064721/Security-Advisory-for-Multiple-Vulnerabilities-on-Multiple-Products-PSV-2021-0324 Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-22-523/ Third Party AdvisoryVDB Entry
https://kb.netgear.com/000064721/Security-Advisory-for-Multiple-Vulnerabilities-on-Multiple-Products-PSV-2021-0324 Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-22-523/ Third Party AdvisoryVDB Entry

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2022-27646), CISA KEV, FIRST EPSS (scores of 2026-10-06). This page is refreshed as NVD updates the record.