What is CVE-2021-34870?

CVE-2021-34870 is a medium-severity vulnerability in NETGEAR Xr1000, classified under Missing Authentication for Critical Function. CVSS score: 6.5/10. Published 2022-01-25.

How severe is CVE-2021-34870?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in NETGEAR Xr1000

CVE-2021-34870

This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of NETGEAR XR1000 1.0.0.52_1.0.38 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the processing of SOAP messages. The issue results from a lack of authentication required for a privileged request. An attacker can leverage this vulnerability to disclose stored credentials, leading to further compromise. Was ZDI-CAN-13325.

Vulnerability class: Broken Authentication

Published 2022-01-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.009 (57.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

NETGEAR Xr1000 — versions 1.0.0.52_1.0.38

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

www.zerodayinitiative.com/advisories/ZDI-21-1058/ (VDB Entry, Third Party Advisory)
kb.netgear.com/000063967/Security-Advisory-for-a-Security-Misconfiguration-Vuln… (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2021-34870?: CVE-2021-34870 is a medium-severity vulnerability in NETGEAR Xr1000, classified under Missing Authentication for Critical Function. CVSS score: 6.5/10. Published 2022-01-25.
How severe is CVE-2021-34870?: Medium severity. CVSS v3 base score is 6.5 out of 10.