CVE-2022-38166Network attack vector

Scanning-engine crash via uncaught unpacker exception

Published Nov 25, 2022 · Updated Apr 29, 2025

Denial of service in F-Secure Endpoint Protection before Capricorn database 2022-11-22_07 allows remote attackers to crash its scanning engine. The aerdl.dll unpacker handler leaves an exception uncaught while unpacking remotely supplied content, propagating the failure into the scanning engine. No authentication or user interaction is required, and the reported consequence is limited to loss of scanning availability.

CVSS severity7.5
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

Denial of service in F-Secure Endpoint Protection before Capricorn database 2022-11-22_07 allows remote attackers to crash its scanning engine. The aerdl.dll unpacker handler leaves an exception uncaught while unpacking remotely supplied content, propagating the failure into the scanning engine. No authentication or user interaction is required, and the reported consequence is limited to loss of scanning availability.

The record

CVE
CVE-2022-38166
Published
Nov 25, 2022
Updated
Apr 29, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-248, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 25, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 29, 2025Record 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

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5NVDCVSS: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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-248Uncaught Exception
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

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Your stack

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