CVE-2021-42627Public exploitNetwork attack vector

Unauthenticated WAN settings disclosure and modification

Published Aug 23, 2022 · Updated Jul 9, 2026

Authentication bypass in D-Link DIR-615 firmware 20.06 allows remote attackers to read and modify WAN settings through wan.htm. The web interface serves the WAN configuration page directly without validating an authenticated session, exposing displayed settings and writable fields. Network access to the management interface is sufficient; credentials and user interaction are unnecessary, while the published evidence does not establish code execution or persistent compromise.

CVSS severity9.8
Critical
EPSS probability63.07%
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-615 firmware 20.06 allows remote attackers to read and modify WAN settings through wan.htm. The web interface serves the WAN configuration page directly without validating an authenticated session, exposing displayed settings and writable fields. Network access to the management interface is sufficient; credentials and user interaction are unnecessary, while the published evidence does not establish code execution or persistent compromise.

The record

CVE
CVE-2021-42627
Published
Aug 23, 2022
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 23, 2022CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record 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

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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