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TI-2021-13855 Aliases CVE-2021-34865GHSA-5wc2-pfcw-568j

Improper authentication in NETGEAR Multiple Routers

Priority MEDIUM 44CWE-287Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-287.

Summary

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of multiple NETGEAR routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of root. Was ZDI-CAN-13313.

Why it matters now

EPSS 0.03075 87th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
NETGEARMultiple Routers1.2.0.76_1.0.1—No fix listedCNA
  • Multiple Routers VendorNETGEAR Affected 1.2.0.76_1.0.1 Fixed in — No fix listed CNA

CPE configurations NVD · 34

CPEVersionsRoleVendor
cpe:2.3:o:netgear:ac2100_firmware:*:*:*:*:*:*:*:*before 1.2.0.88VulnerableNETGEAR
cpe:2.3:h:netgear:ac2100:-:*:*:*:*:*:*:*not specified by NVDRunning onNETGEAR
cpe:2.3:o:netgear:ac2400_firmware:*:*:*:*:*:*:*:*before 1.2.0.88VulnerableNETGEAR
cpe:2.3:h:netgear:ac2400:-:*:*:*:*:*:*:*not specified by NVDRunning onNETGEAR
cpe:2.3:o:netgear:ac2600_firmware:*:*:*:*:*:*:*:*before 1.2.0.88VulnerableNETGEAR
cpe:2.3:h:netgear:ac2600:-:*:*:*:*:*:*:*not specified by NVDRunning onNETGEAR
cpe:2.3:o:netgear:d7000v1_firmware:*:*:*:*:*:*:*:*before 1.0.1.80VulnerableNETGEAR
cpe:2.3:h:netgear:d7000v1:-:*:*:*:*:*:*:*not specified by NVDRunning onNETGEAR
cpe:2.3:o:netgear:r6220_firmware:*:*:*:*:*:*:*:*before 1.1.0.110VulnerableNETGEAR
cpe:2.3:h:netgear:r6220:-:*:*:*:*:*:*:*not specified by NVDRunning onNETGEAR
  • cpe:2.3:o:netgear:ac2100_firmware:*:*:*:*:*:*:*:* Versions before 1.2.0.88 Vulnerable ·NETGEAR
  • cpe:2.3:h:netgear:ac2100:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NETGEAR
  • cpe:2.3:o:netgear:ac2400_firmware:*:*:*:*:*:*:*:* Versions before 1.2.0.88 Vulnerable ·NETGEAR
  • cpe:2.3:h:netgear:ac2400:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NETGEAR
  • cpe:2.3:o:netgear:ac2600_firmware:*:*:*:*:*:*:*:* Versions before 1.2.0.88 Vulnerable ·NETGEAR
  • cpe:2.3:h:netgear:ac2600:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NETGEAR
  • cpe:2.3:o:netgear:d7000v1_firmware:*:*:*:*:*:*:*:* Versions before 1.0.1.80 Vulnerable ·NETGEAR
  • cpe:2.3:h:netgear:d7000v1:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NETGEAR
  • cpe:2.3:o:netgear:r6220_firmware:*:*:*:*:*:*:*:* Versions before 1.1.0.110 Vulnerable ·NETGEAR
  • cpe:2.3:h:netgear:r6220:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NETGEAR
Show 24 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:netgear:r6230_firmware:*:*:*:*:*:*:*:*before 1.1.0.110VulnerableNETGEAR
cpe:2.3:h:netgear:r6230:-:*:*:*:*:*:*:*not specified by NVDRunning onNETGEAR
cpe:2.3:o:netgear:r6260_firmware:*:*:*:*:*:*:*:*before 1.1.0.84VulnerableNETGEAR
cpe:2.3:h:netgear:r6260:-:*:*:*:*:*:*:*not specified by NVDRunning onNETGEAR
cpe:2.3:o:netgear:r6330_firmware:*:*:*:*:*:*:*:*before 1.1.0.84VulnerableNETGEAR
cpe:2.3:h:netgear:r6330:-:*:*:*:*:*:*:*not specified by NVDRunning onNETGEAR
cpe:2.3:o:netgear:r6350_firmware:*:*:*:*:*:*:*:*before 1.1.0.84VulnerableNETGEAR
cpe:2.3:h:netgear:r6350:-:*:*:*:*:*:*:*not specified by NVDRunning onNETGEAR
cpe:2.3:o:netgear:r6700v2_firmware:*:*:*:*:*:*:*:*before 1.2.0.88VulnerableNETGEAR
cpe:2.3:h:netgear:r6700v2:-:*:*:*:*:*:*:*not specified by NVDRunning onNETGEAR
cpe:2.3:o:netgear:r6800_firmware:*:*:*:*:*:*:*:*before 1.2.0.88VulnerableNETGEAR
cpe:2.3:h:netgear:r6800:-:*:*:*:*:*:*:*not specified by NVDRunning onNETGEAR
cpe:2.3:o:netgear:r6850_firmware:*:*:*:*:*:*:*:*before 1.1.0.84VulnerableNETGEAR
cpe:2.3:h:netgear:r6850:-:*:*:*:*:*:*:*not specified by NVDRunning onNETGEAR
cpe:2.3:o:netgear:r6900v2_firmware:*:*:*:*:*:*:*:*before 1.2.0.88VulnerableNETGEAR
cpe:2.3:h:netgear:r6900v2:-:*:*:*:*:*:*:*not specified by NVDRunning onNETGEAR
cpe:2.3:o:netgear:r7200_firmware:*:*:*:*:*:*:*:*before 1.2.0.88VulnerableNETGEAR
cpe:2.3:h:netgear:r7200:-:*:*:*:*:*:*:*not specified by NVDRunning onNETGEAR
cpe:2.3:o:netgear:r7350_firmware:*:*:*:*:*:*:*:*before 1.2.0.88VulnerableNETGEAR
cpe:2.3:h:netgear:r7350:-:*:*:*:*:*:*:*not specified by NVDRunning onNETGEAR
cpe:2.3:o:netgear:r7400_firmware:*:*:*:*:*:*:*:*before 1.2.0.88VulnerableNETGEAR
cpe:2.3:h:netgear:r7400:-:*:*:*:*:*:*:*not specified by NVDRunning onNETGEAR
cpe:2.3:o:netgear:r7450_firmware:*:*:*:*:*:*:*:*before 1.2.0.88VulnerableNETGEAR
cpe:2.3:h:netgear:r7450:-:*:*:*:*:*:*:*not specified by NVDRunning onNETGEAR
  • cpe:2.3:o:netgear:r6230_firmware:*:*:*:*:*:*:*:* Versions before 1.1.0.110 Vulnerable ·NETGEAR
  • cpe:2.3:h:netgear:r6230:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NETGEAR
  • cpe:2.3:o:netgear:r6260_firmware:*:*:*:*:*:*:*:* Versions before 1.1.0.84 Vulnerable ·NETGEAR
  • cpe:2.3:h:netgear:r6260:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NETGEAR
  • cpe:2.3:o:netgear:r6330_firmware:*:*:*:*:*:*:*:* Versions before 1.1.0.84 Vulnerable ·NETGEAR
  • cpe:2.3:h:netgear:r6330:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NETGEAR
  • cpe:2.3:o:netgear:r6350_firmware:*:*:*:*:*:*:*:* Versions before 1.1.0.84 Vulnerable ·NETGEAR
  • cpe:2.3:h:netgear:r6350:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NETGEAR
  • cpe:2.3:o:netgear:r6700v2_firmware:*:*:*:*:*:*:*:* Versions before 1.2.0.88 Vulnerable ·NETGEAR
  • cpe:2.3:h:netgear:r6700v2:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NETGEAR
  • cpe:2.3:o:netgear:r6800_firmware:*:*:*:*:*:*:*:* Versions before 1.2.0.88 Vulnerable ·NETGEAR
  • cpe:2.3:h:netgear:r6800:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NETGEAR
  • cpe:2.3:o:netgear:r6850_firmware:*:*:*:*:*:*:*:* Versions before 1.1.0.84 Vulnerable ·NETGEAR
  • cpe:2.3:h:netgear:r6850:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NETGEAR
  • cpe:2.3:o:netgear:r6900v2_firmware:*:*:*:*:*:*:*:* Versions before 1.2.0.88 Vulnerable ·NETGEAR
  • cpe:2.3:h:netgear:r6900v2:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NETGEAR
  • cpe:2.3:o:netgear:r7200_firmware:*:*:*:*:*:*:*:* Versions before 1.2.0.88 Vulnerable ·NETGEAR
  • cpe:2.3:h:netgear:r7200:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NETGEAR
  • cpe:2.3:o:netgear:r7350_firmware:*:*:*:*:*:*:*:* Versions before 1.2.0.88 Vulnerable ·NETGEAR
  • cpe:2.3:h:netgear:r7350:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NETGEAR
  • cpe:2.3:o:netgear:r7400_firmware:*:*:*:*:*:*:*:* Versions before 1.2.0.88 Vulnerable ·NETGEAR
  • cpe:2.3:h:netgear:r7400:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NETGEAR
  • cpe:2.3:o:netgear:r7450_firmware:*:*:*:*:*:*:*:* Versions before 1.2.0.88 Vulnerable ·NETGEAR
  • cpe:2.3:h:netgear:r7450:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NETGEAR

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-34865
  2. 2026-10-03 Alias added: GHSA-5wc2-pfcw-568j

References

Advisory 2

  • TI-2021-20598 Certain NETGEAR devices are affected by authentication bypass. CVSS 3.1CRITICAL 9.8
  • TI-2020-16934 Authentication bypass in NETGEAR Multiple Routers CVSS 3.1HIGH 8.8
  • TI-2021-16116 Certain NETGEAR devices are affected by lack of access control at the function level. CVSS 3.1CRITICAL 10.0
  • TI-2021-20724 Certain NETGEAR devices are affected by a stack-based buffer overflow by an… CVSS 3.1CRITICAL 9.8
  • TI-2021-09955 Certain NETGEAR devices are affected by a buffer overflow by an authenticated user. CVSS 3.1CRITICAL 9.9
  • TI-2021-20731 Certain NETGEAR devices are affected by incorrect configuration of security settings. CVSS 3.1CRITICAL 9.8
See all 25 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences