CVE-2023-20106Network attack vector

Restricted file access via missing permission validation

Published May 18, 2023 · Updated Oct 25, 2024

Authorization bypass in Cisco ISE 3.1 through 3.1P5 and 3.2 through 3.2P1 allows remote authenticated users to access restricted files. The web-based management interface accepts crafted HTTP requests for file functions without server-side validation of Administrator permissions. Read-only Administrator credentials suffice to download or delete certain files outside that role's authorization.

CVSS severity5.4
Medium
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Cisco ISE 3.1 through 3.1P5 and 3.2 through 3.2P1 allows remote authenticated users to access restricted files. The web-based management interface accepts crafted HTTP requests for file functions without server-side validation of Administrator permissions. Read-only Administrator credentials suffice to download or delete certain files outside that role's authorization.

The record

CVE
CVE-2023-20106
Published
May 18, 2023
Updated
Oct 25, 2024
Vendor
ClamAV
Product
Cisco Identity Services Engine
Classifications
CWE-602, T1070.004, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 18, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 25, 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 privilegesauthenticated

What is affected?

ClamAV · Cisco Identity Services Engineversion=n/a

Published CVSS scores

3.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
5.4Cisco Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-602Client-Side Enforcement of Server-Side Security
T1070.004File Deletion
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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