CVE-2022-26642Public exploitNetwork attack vector

Authenticated memory corruption via cloned MAC parameter

Published Mar 28, 2022 · Updated Aug 3, 2024

Buffer overflow in TP-Link TL-WR840N(ES) V6.20 allows remote authenticated users to corrupt memory through a crafted network request. The X_TP_ClonedMACAddress parameter handler copies attacker-controlled data without checking the destination buffer's size. High-privilege authentication is required; the public disclosure does not identify the exact handler or establish whether the corruption causes a crash or code execution.

CVSS severity7.2
High
EPSS probability1.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in TP-Link TL-WR840N(ES) V6.20 allows remote authenticated users to corrupt memory through a crafted network request. The X_TP_ClonedMACAddress parameter handler copies attacker-controlled data without checking the destination buffer's size. High-privilege authentication is required; the public disclosure does not identify the exact handler or establish whether the corruption causes a crash or code execution.

The record

CVE
CVE-2022-26642
Published
Mar 28, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 28, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P
7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

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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