CVE-2021-41753Network attack vector

Wireless client disconnection via spoofed SAE frames

Published Sep 27, 2021 · Updated Aug 4, 2024

Denial of service in D-Link DIR-X1560 1.04B04 and DIR-X6060 1.11B04 allows remote attackers to disconnect wireless clients. The WPA2 and WPA3-SAE authentication handling accepts specifically crafted spoofed SAE authentication frames and terminates an active client's connection. No authentication is required, but the attacker must transmit wireless management traffic that reaches the router; the reported consequence is client disconnection rather than a router crash.

CVSS severity7.5
High
EPSS probability2.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Denial of service in D-Link DIR-X1560 1.04B04 and DIR-X6060 1.11B04 allows remote attackers to disconnect wireless clients. The WPA2 and WPA3-SAE authentication handling accepts specifically crafted spoofed SAE authentication frames and terminates an active client's connection. No authentication is required, but the attacker must transmit wireless management traffic that reaches the router; the reported consequence is client disconnection rather than a router crash.

The record

CVE
CVE-2021-41753
Published
Sep 27, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-290, T1498
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 27, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

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 NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.8NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:C

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-290Authentication Bypass by Spoofing
T1498Network Denial of Service

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo