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Fencer Vulns
high 8.8

CVE-2020-27872 json

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R7450 1.2.0.62_1.0.1 rou…

published 2021-02-04 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-20365

cvss
8.8
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 61%
public exploits
0
none known

Summary

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R7450 1.2.0.62_1.0.1 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 improper state tracking in the password recovery process. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root. Was ZDI-CAN-11365.

Patch / fix

  • netgear ac2100_firmware 1.2.0.76
  • netgear ac2400_firmware 1.2.0.76
  • netgear ac2600_firmware 1.2.0.76
  • netgear r6700_firmware 1.2.0.76
  • netgear r6800_firmware 1.2.0.76
  • netgear r6900_firmware 1.2.0.76
  • netgear r7200_firmware 1.2.0.76
  • netgear r7350_firmware 1.2.0.76
  • netgear r7400_firmware 1.2.0.76
  • netgear r7450_firmware 1.2.0.76
  • netgear r6220_firmware 1.1.0.104
  • netgear r6230_firmware 1.1.0.104
  • netgear r6260_firmware 1.1.0.78
  • netgear r6330_firmware 1.1.0.78
  • netgear r6350_firmware 1.1.0.78
  • netgear r6850_firmware 1.1.0.78
  • netgear r6120_firmware 1.0.0.76
  • netgear r6020_firmware 1.0.0.48
  • netgear r6080_firmware 1.0.0.48

Exploit prediction

0.94% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.0 8.8 CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 5.8 AV:A/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • NETGEAR R7450

Classification

Weakness
  • CWE-642 External Control of Critical State Data
  • CWE-668 Exposure of Resource to Wrong Sphere

References

Sources

Fencer Vulns 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.