CVE-2021-42783Network attack vector

Unauthenticated administrative actions via crafted HTTP requests

Published Nov 23, 2021 · Updated Aug 4, 2024

Missing authentication in D-Link DWR-932C E1 firmware 1.0.0.4 and earlier allows remote attackers to execute administrative actions. The debug_post_set.cgi handler accepts crafted HTTP requests for administrative functions without authenticating the requester. Network reachability to the device management interface is sufficient, and successful requests can change device administration without credentials.

CVSS severity9.8
Critical
EPSS probability3.92%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in D-Link DWR-932C E1 firmware 1.0.0.4 and earlier allows remote attackers to execute administrative actions. The debug_post_set.cgi handler accepts crafted HTTP requests for administrative functions without authenticating the requester. Network reachability to the device management interface is sufficient, and successful requests can change device administration without credentials.

The record

CVE
CVE-2021-42783
Published
Nov 23, 2021
Updated
Aug 4, 2024
Vendor
D-Link
Product
DWR-932C
Classifications
CWE-306, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 23, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.0.4 <=1.0.0.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

D-Link · DWR-932Cversion=1.0.0.4 <=1.0.0.4

Published CVSS scores

10.0NIST NVDAV:N/AC:L/Au:N/C:C/I:C/A:C
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 exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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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