CVE-2021-41314Public exploit

Unauthenticated admin access via newline injection

Published Sep 16, 2021 · Updated Aug 4, 2024

Authentication bypass in NETGEAR smart switches before listed fixed firmware versions allows remote unauthenticated attackers to gain web UI administrator access. The web UI stores password input in an intermediate file without newline encoding, letting crafted input redirect file creation and write predictable contents that pass session validation. Exploitation requires network access to the switch interface and can be chained to administrator-level control and root command execution.

CVSS severity8.8
High
EPSS probability13.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in NETGEAR smart switches before listed fixed firmware versions allows remote unauthenticated attackers to gain web UI administrator access. The web UI stores password input in an intermediate file without newline encoding, letting crafted input redirect file creation and write predictable contents that pass session validation. Exploitation requires network access to the switch interface and can be chained to administrator-level control and root command execution.

The record

CVE
CVE-2021-41314
Published
Sep 16, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-74, T1190
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 16, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.3NVDAV:A/AC:L/Au:N/C:C/I:C/A:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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