CVE-2020-24772Network attack vector

Code execution via forced SMB authentication

Published Mar 21, 2022 · Updated Aug 4, 2024

Origin validation error in Dreamacro Clash for Windows 0.11.4 allows remote attackers to obtain code execution through a crafted web page. A malicious iframe invokes the client with a crafted URL, and the URL launch path accepts the untrusted destination and opens an attacker-controlled SMB share. A user must visit the page; Windows then sends NTLM authentication that attackers can capture for offline cracking or relay for code execution.

CVSS severity8.8
High
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Origin validation error in Dreamacro Clash for Windows 0.11.4 allows remote attackers to obtain code execution through a crafted web page. A malicious iframe invokes the client with a crafted URL, and the URL launch path accepts the untrusted destination and opens an attacker-controlled SMB share. A user must visit the page; Windows then sends NTLM authentication that attackers can capture for offline cracking or relay for code execution.

The record

CVE
CVE-2020-24772
Published
Mar 21, 2022
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-346, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 21, 2022CVE 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

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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

8.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NVDAV:N/AC:M/Au:N/C:P/I:P/A:P

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-346Origin Validation Error
T1189Drive-by Compromise

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

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Your stack

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