CVE-2021-41441Public exploitNetwork attack vector

Router reboot via relative path overwrite

Published Feb 9, 2022 · Updated Jul 9, 2026

Relative path overwrite in the D-Link DIR-X1860 web application before 1.10WWB09_Beta allows remote attackers to reboot the router. In Quirks Mode, the web interface treats an attacker-manipulated URL as a relative stylesheet path and repeatedly requests it until the device reboots. Exploitation requires an authenticated victim on the local network to visit the crafted URL, and the reported consequence is a router reboot.

CVSS severity7.4
High
EPSS probability1.58%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Relative path overwrite in the D-Link DIR-X1860 web application before 1.10WWB09_Beta allows remote attackers to reboot the router. In Quirks Mode, the web interface treats an attacker-manipulated URL as a relative stylesheet path and repeatedly requests it until the device reboots. Exploitation requires an authenticated victim on the local network to visit the crafted URL, and the reported consequence is a router reboot.

The record

CVE
CVE-2021-41441
Published
Feb 9, 2022
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1491.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 9, 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

7.1NVDAV:N/AC:M/Au:N/C:N/I:N/A:C
7.4NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/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

T1491.002Endpoint Denial of Service

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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