CVE-2021-41445Public exploitNetwork attack vector

Script execution via unsanitized 403 response query

Published Feb 10, 2022 · Updated Jul 9, 2026

Reflected XSS in the D-Link DIR-X1860 web interface in firmware 1.03 and earlier allows remote attackers to run script in a victim's browser. The 403 response for paths such as //hnap/, /cgi-bin/, or /info/ reflects every value after the URL's question mark without sanitization. Exploitation requires the victim's browser to receive an unencoded payload through a man-in-the-middle path or an equivalent encoding bypass; router compromise is not established.

CVSS severity6.1
Medium
EPSS probability1.81%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in the D-Link DIR-X1860 web interface in firmware 1.03 and earlier allows remote attackers to run script in a victim's browser. The 403 response for paths such as //hnap/, /cgi-bin/, or /info/ reflects every value after the URL's question mark without sanitization. Exploitation requires the victim's browser to receive an unencoded payload through a man-in-the-middle path or an equivalent encoding bypass; router compromise is not established.

The record

CVE
CVE-2021-41445
Published
Feb 10, 2022
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 10, 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

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001Malicious Link

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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