CVE-2021-45521

Sensitive-data disclosure via hardcoded password

Published Dec 26, 2021 · Updated Aug 4, 2024

Hardcoded credentials in NETGEAR RBK352, RBR350, and RBS350 before 4.4.0.10 allow attackers to read sensitive data over an adjacent network. NETGEAR has not published the credential's storage location, affected account or service, or the operation that accepts the embedded password. Exploitation requires adjacent-network access and no prior privileges or user interaction, and the published impact is limited to confidentiality.

CVSS severity6.5
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Hardcoded credentials in NETGEAR RBK352, RBR350, and RBS350 before 4.4.0.10 allow attackers to read sensitive data over an adjacent network. NETGEAR has not published the credential's storage location, affected account or service, or the operation that accepts the embedded password. Exploitation requires adjacent-network access and no prior privileges or user interaction, and the published impact is limited to confidentiality.

The record

CVE
CVE-2021-45521
Published
Dec 26, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-798
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 26, 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

7.4NETGEARCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
3.3NIST NVDAV:A/AC:L/Au:N/C:P/I:N/A:N
6.5NIST NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-798Use of Hard-coded Credentials

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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