CVE-2022-20748Network attack vector

Service interruption via malformed-file analysis crash

Published May 3, 2022 · Updated Nov 6, 2024

Denial of service in Cisco Firepower Threat Defense Software 7.0.0 allows unauthenticated remote attackers to interrupt service with a crafted file. The local malware analysis process insufficiently handles errors raised while inspecting the file and crashes instead of rejecting it safely. Exploitation requires a Malware and File policy with Local Malware Analysis enabled and can require manual recovery; cloud lookup and dynamic analysis continue.

CVSS severity5.3
Medium
EPSS probability1.27%
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 Cisco Firepower Threat Defense Software 7.0.0 allows unauthenticated remote attackers to interrupt service with a crafted file. The local malware analysis process insufficiently handles errors raised while inspecting the file and crashes instead of rejecting it safely. Exploitation requires a Malware and File policy with Local Malware Analysis enabled and can require manual recovery; cloud lookup and dynamic analysis continue.

The record

CVE
CVE-2022-20748
Published
May 3, 2022
Updated
Nov 6, 2024
Vendor
ClamAV
Product
Cisco Firepower Threat Defense Software
Classifications
CWE-664, CWE-755, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 3, 2022CVE publishedPublication date reported by the CVE source.
  2. Nov 6, 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?

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 Firepower Threat Defense Softwareversion=n/a

Published CVSS scores

5.0NIST National Vulnerability DatabaseAV:N/AC:L/Au:N/C:N/I:N/A:P
5.3Cisco Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:X/RC:X

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-664Improper Control of a Resource Through its Lifetime
CWE-755Improper Handling of Exceptional Conditions
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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