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Vulnerability record · CVE-2021-34983 · published 7 May 2024

CVE-2021-34983: Netgear xr1000 firmware missing authentication for critical function vulnerability

Netgear · Xr1000 Firmware

NETGEAR Multiple Routers httpd Missing Authentication for Critical Function Information Disclosure Vulnerability. This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of multiple NETGEAR routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the httpd service, which listens on TCP port 80 by default. The issue results from the lack of authentication prior to allowing access to system configuration information. An attacker can leverage this vulnerability to disclose stored credentials, leading to further compromise. Was ZDI-CAN-13708.

6.5 CVSS 3.0 Medium EPSS 0.33% · top 76.5% CWE-306 · Missing authentication for critical function
6.5CVSS 3.0 base score
0.33%EPSS exploitation probability, 30 days
NoNot in CISA KEV
52Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

NETGEAR Multiple Routers httpd Missing Authentication for Critical Function Information Disclosure Vulnerability. This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of multiple NETGEAR routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the httpd service, which listens on TCP port 80 by default. The issue results from the lack of authentication prior to allowing access to system configuration information. An attacker can leverage this vulnerability to disclose stored credentials, leading to further compromise. Was ZDI-CAN-13708.

CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

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

References

LinkTags
https://kb.netgear.com/000064313/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Extenders-Routers-and- Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1275/ Third Party Advisory
https://kb.netgear.com/000064313/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Extenders-Routers-and- Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1275/ Third Party Advisory

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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-2021-34983), CISA KEV, FIRST EPSS (scores of 2026-10-03). This page is refreshed as NVD updates the record.