CVE-2022-28956Public exploitNetwork attack vector

Unauthenticated access via AUTHORIZED_GROUP parameter injection

Published May 18, 2022 · Updated Aug 3, 2024

Authentication bypass in D-Link DIR-816L firmware 2.06B01 allows remote attackers to access getcfg.php via a crafted HTTP request. The endpoint accepts an encoded newline followed by AUTHORIZED_GROUP=1 and treats the injected value as an authorized group. No credentials or user interaction are required, and the payload returns a page that the device otherwise rejects as unauthorized.

CVSS severity9.8
Critical
EPSS probability22.68%
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 D-Link DIR-816L firmware 2.06B01 allows remote attackers to access getcfg.php via a crafted HTTP request. The endpoint accepts an encoded newline followed by AUTHORIZED_GROUP=1 and treats the injected value as an authorized group. No credentials or user interaction are required, and the payload returns a page that the device otherwise rejects as unauthorized.

The record

CVE
CVE-2022-28956
Published
May 18, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 18, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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 vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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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