CVE-2022-20956Network attack vector

Authenticated system-file access via improper web authorization

Published Nov 3, 2022 · Updated Aug 3, 2024

Improper access control in Cisco Identity Services Engine 3.1 and 3.2 allows remote authenticated users to access system files. The web-based management interface accepts a crafted HTTP request without enforcing file authorization, permitting unauthorized listing, download, or deletion. Valid ISE credentials are required, and successful exploitation permits file discovery, data disclosure, and file deletion.

CVSS severity7.1
High
EPSS probability1.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Cisco Identity Services Engine 3.1 and 3.2 allows remote authenticated users to access system files. The web-based management interface accepts a crafted HTTP request without enforcing file authorization, permitting unauthorized listing, download, or deletion. Valid ISE credentials are required, and successful exploitation permits file discovery, data disclosure, and file deletion.

The record

CVE
CVE-2022-20956
Published
Nov 3, 2022
Updated
Aug 3, 2024
Vendor
ClamAV
Product
Cisco Identity Services Engine
Classifications
CWE-648, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 3, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=3.1.0
  2. Affected versionversion=3.1.0 p1
  3. Affected versionversion=3.1.0 p3
  4. Affected versionversion=3.1.0 p4
  5. Affected versionversion=3.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ClamAV · Cisco Identity Services Engineversion=3.1.0; version=3.1.0 p1; version=3.1.0 p3; version=3.1.0 p4; version=3.2.0

Published CVSS scores

7.1CiscoCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-648Incorrect Use of Privileged APIs
T1005Data from Local System

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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