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Fencer Intel
medium 6.5

CVE-2021-34983 json

NETGEAR Multiple Routers httpd Missing Authentication for Critical Function Information Disclosure Vulnerability

published 2y ago modified 4mo ago also EUVD-2021-21630

cvss
6.5
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 26%
public exploits
0
none known

Summary

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.

Patch / fix

  • netgear xr1000_firmware 1.0.0.64
  • netgear xr300_firmware 1.0.3.68
  • netgear d6220_firmware 1.0.0.76
  • netgear d6400_firmware 1.0.0.108
  • netgear d7000v2_firmware 1.0.0.76
  • netgear dgn2200v4_firmware 1.0.0.126
  • netgear v6510-1fxaus_firmware 1.0.0.80
  • netgear dc112a_firmware 1.0.0.62
  • netgear ex3700_firmware 1.0.0.94
  • netgear ex3800_firmware 1.0.0.94
  • netgear ex6120_firmware 1.0.0.66
  • netgear ex6130_firmware 1.0.0.46
  • netgear ex7000_firmware 1.0.1.106
  • netgear ex7500_firmware 1.0.1.76
  • netgear mr60_firmware 1.1.6.122
  • netgear mr80_firmware 1.1.6.10
  • netgear ms60_firmware 1.1.6.122
  • netgear ms80_firmware 1.1.6.10
  • netgear lax20_firmware 1.1.6.30
  • netgear r6400_firmware 1.0.1.76

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2y ago

Exploit prediction

0.33% chance of exploitation in the next 30 days, higher than 26% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.0 6.5 CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

  • NETGEAR Multiple Routers

Classification

Weakness
  • CWE-306 Missing Authentication for Critical Functionality

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.