CVE-2022-20698Network attack vector

Scanning-process crash via invalid OOXML pointer read

Published Jan 14, 2022 · Updated Nov 6, 2024

Denial of service in Cisco ClamAV 0.104.1 and 0.103.4 and earlier allows remote attackers to crash scanning with crafted OOXML. The OOXML parser insufficiently validates the document and performs an invalid pointer read while collecting JSON metadata. Exploitation requires a build compiled with libjson-c and the metadata-collection scan option enabled; a successful file scan terminates the scanning process.

CVSS severity7.5
High
EPSS probability3.06%
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 ClamAV 0.104.1 and 0.103.4 and earlier allows remote attackers to crash scanning with crafted OOXML. The OOXML parser insufficiently validates the document and performs an invalid pointer read while collecting JSON metadata. Exploitation requires a build compiled with libjson-c and the metadata-collection scan option enabled; a successful file scan terminates the scanning process.

The record

CVE
CVE-2022-20698
Published
Jan 14, 2022
Updated
Nov 6, 2024
Vendor
ClamAV
Product
ClamAV
Classifications
CWE-125, CWE-20, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 14, 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=unspecified <0.103.5
  2. Affected versionversion=unspecified <0.104.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ClamAV · ClamAVversion=unspecified <0.103.5; version=unspecified <0.104.2

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P
7.5Cisco Systems, Inc.CVSS: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 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-125Out-of-bounds Read
CWE-20Improper Input Validation
T1499Endpoint Denial of Service

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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