CVE-2023-20066Network attack vector

Authenticated file disclosure via web UI path traversal

Published Mar 23, 2023 · Updated Oct 25, 2024

Path traversal in the web UI of Cisco IOS XE Software allows remote authenticated users to read files via crafted web requests. An insufficient security configuration lets crafted paths escape the web UI filesystem mountpoint and access files in its restricted filesystem. The web UI must be enabled and valid credentials are required; access is read-only, with no ability to modify the exposed files.

CVSS severity6.5
Medium
EPSS probability1.71%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in the web UI of Cisco IOS XE Software allows remote authenticated users to read files via crafted web requests. An insufficient security configuration lets crafted paths escape the web UI filesystem mountpoint and access files in its restricted filesystem. The web UI must be enabled and valid credentials are required; access is read-only, with no ability to modify the exposed files.

The record

CVE
CVE-2023-20066
Published
Mar 23, 2023
Updated
Oct 25, 2024
Vendor
ClamAV
Product
Cisco IOS XE Software
Classifications
CWE-23, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 23, 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 IOS XE Softwareversion=n/a

Published CVSS scores

6.5CiscoCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:X/RL:X/RC:X
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-23Relative Path Traversal
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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