CVE-2022-20780Public exploitNetwork attack vector

Host file disclosure via external XML entities

Published May 4, 2022 · Updated Nov 6, 2024

XXE injection in Cisco Enterprise NFVIS before 4.7.1 allows remote attackers to read host files through a crafted VM backup import. The vmImportAction command passes dep.xml from a .vmbkp archive to EncsManager with external-entity resolution enabled, embedding referenced host-file contents in VM configuration data. Exploitation requires an administrator to import the crafted archive, while authenticated users in a configured VM can access the disclosed data.

CVSS severity7.4
High
EPSS probability11.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XXE injection in Cisco Enterprise NFVIS before 4.7.1 allows remote attackers to read host files through a crafted VM backup import. The vmImportAction command passes dep.xml from a .vmbkp archive to EncsManager with external-entity resolution enabled, embedding referenced host-file contents in VM configuration data. Exploitation requires an administrator to import the crafted archive, while authenticated users in a configured VM can access the disclosed data.

The record

CVE
CVE-2022-20780
Published
May 4, 2022
Updated
Nov 6, 2024
Vendor
ClamAV
Product
Cisco Enterprise NFV Infrastructure Software
Classifications
CWE-611, CAPEC-221, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 4, 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 Enterprise NFV Infrastructure Softwareversion=n/a

Published CVSS scores

7.4CiscoCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
7.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

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 exploitPublished

Weakness, pattern, technique

CWE-611Improper Restriction of XML External Entity Reference
CAPEC-221Data Serialization External Entities Blowup
T1005Data from Local System

Public exploit references

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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