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NVD / CVE Program· CNA zdi

CVE-2020-27867: This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6020, R6080, R6120…

MediumCVSS 6.8 · v3.1—No exploit No fix recorded

Noroxi assessment

Priority: Monitor (action score 28/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 2.3% (FIRST EPSS); higher than 83.7% of all records.
  • Someone on the same network segment can trigger it. Administrator privileges are required. No user action is required. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100, and Nighthawk AC2400 routers. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. When parsing the funjsq_access_token parameter, the process does not properly validate a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-11653.

Published
Feb 11, 2021
Updated
Jun 16, 2026
EPSS
2.3% · 83th percentile

Report tools

JSON

Action score

28

Monitor

Low priority for now.

CVSS
27 / 40 · 6.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 2.3%

CNA vs NVD score

NVD
6.8
CNA · zdi
6.8
agree

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2020-27867

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
netgearac2100 firmware
netgearac2100
netgearac2400 firmware
netgearac2400
netgearac2600 firmware
netgearac2600
netgearr6700 firmware
netgearr6700
netgearr6800 firmware
netgearr6800
netgearr6900 firmware
netgearr6900

and 26 more

Versions reported by the vendor

Affected version ranges reported by the assigning authority (zdi). Independent of NVD's CPE analysis and usually ahead of it.

  • NETGEAR Multiple Routers

    • firmware version 1.2.0.62_1.0.1affected
Affected versions · NVD (19)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • netgear ac2100 firmwarebefore 1.2.0.76
  • netgear ac2400 firmwarebefore 1.2.0.76
  • netgear ac2600 firmwarebefore 1.2.0.76
  • netgear r6020 firmwarebefore 1.0.0.48
  • netgear r6080 firmwarebefore 1.0.0.48
  • netgear r6120 firmwarebefore 1.0.0.76
  • netgear r6220 firmwarebefore 1.1.0.104
  • netgear r6230 firmwarebefore 1.1.0.104
  • netgear r6260 firmwarebefore 1.1.0.78
  • netgear r6330 firmwarebefore 1.1.0.78
  • netgear r6350 firmwarebefore 1.1.0.78
  • netgear r6700 firmwarebefore 1.2.0.76
  • netgear r6800 firmwarebefore 1.2.0.76
  • netgear r6850 firmwarebefore 1.1.0.78
  • netgear r6900 firmwarebefore 1.2.0.76
  • netgear r7200 firmwarebefore 1.2.0.76
  • netgear r7350 firmwarebefore 1.2.0.76
  • netgear r7400 firmwarebefore 1.2.0.76
  • netgear r7450 firmwarebefore 1.2.0.76

Same product

netgear: all records

Other highest-scoring records for the same primary product.

  • CVE-2021-45511Certain NETGEAR devices are affected by authentication bypass.
    60This week
  • CVE-2021-45644Certain NETGEAR devices are affected by incorrect configuration of security settings.
    39Monitor
  • CVE-2020-35795Certain NETGEAR devices are affected by a buffer overflow by an unauthenticated attacker.
    39Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2020-27873Feb 4, 2021 · This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of NETGEAR R7450…
    26Monitor
  • ← EarlierCVE-2020-27866Feb 11, 2021 · This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R6020, R6080, R6120…
    38Monitor
  • Later →CVE-2021-45534Dec 25, 2021 · Certain NETGEAR devices are affected by command injection by an authenticated user.
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

  • CVE-2020-278660 days apartThis vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R6020, R6080, R6120…
    38Monitor
  • CVE-2020-278727 days apartThis vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R7450 1.2.0.62_1.0.1…
    35Monitor

Not on record for this CVE: EPSS history · patch commit or PR link · public bounty program.

Technical details

Attack conditions

  • Someone on the same network segment can trigger it.
  • Administrator privileges are required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Adjacent
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-77 · Improper Neutralization of Special Elements used in a Command ('Command Injection')

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records