CVE-2023-20212Network attack vector

Scanner restart via AutoIt memory-management error

Published Aug 18, 2023 · Updated Aug 2, 2024

Denial of service in Cisco Secure Endpoint Connector for Windows allows remote attackers to restart its scanning process via crafted AutoIt files. The AutoIt module mishandles memory while parsing an attacker-controlled file; Cisco has disclosed only a memory-management logic error, not the precise operation. The file must reach an affected connector for scanning, and exploitation crashes the ClamAV service, delaying scans until the service restarts.

CVSS severity7.5
High
EPSS probability3.44%
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 Cisco Secure Endpoint Connector for Windows allows remote attackers to restart its scanning process via crafted AutoIt files. The AutoIt module mishandles memory while parsing an attacker-controlled file; Cisco has disclosed only a memory-management logic error, not the precise operation. The file must reach an affected connector for scanning, and exploitation crashes the ClamAV service, delaying scans until the service restarts.

The record

CVE
CVE-2023-20212
Published
Aug 18, 2023
Updated
Aug 2, 2024
Vendor
ClamAV
Product
Cisco Secure Endpoint
Classifications
CWE-825, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 18, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=N/A

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco Secure Endpointversion=N/A

Published CVSS scores

7.5Cisco PSIRTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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.

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-825Expired Pointer Dereference
T1499.004Application or System Exploitation

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