CVE-2020-3222

Unauthenticated access-control bypass via web UI proxy

Published Jun 3, 2020 · Updated Nov 15, 2024

Access-control bypass in the Cisco IOS XE Software web UI allows remote attackers on an adjacent network to proxy access requests. A specific, undisclosed web UI endpoint exposes a proxy service that forwards attacker-supplied requests through the management VRF. The web UI and applicable active-session modules must be enabled; successful use bypasses network restrictions without reported disclosure or interruption.

CVSS severity4.3
Medium
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Access-control bypass in the Cisco IOS XE Software web UI allows remote attackers on an adjacent network to proxy access requests. A specific, undisclosed web UI endpoint exposes a proxy service that forwards attacker-supplied requests through the management VRF. The web UI and applicable active-session modules must be enabled; successful use bypasses network restrictions without reported disclosure or interruption.

The record

CVE
CVE-2020-3222
Published
Jun 3, 2020
Updated
Nov 15, 2024
Vendor
ClamAV
Product
Cisco IOS XE Software
Classifications
CWE-17, T1090
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 3, 2020CVE publishedPublication date reported by the CVE source.
  2. Nov 15, 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?

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  1. Affected versionversion=n/a

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco IOS XE Softwareversion=n/a

Published CVSS scores

4.3NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
4.3CiscoCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
3.3NVDAV:A/AC:L/Au:N/C:N/I:P/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-17CWE CATEGORY: DEPRECATED: Code
T1090Proxy

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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