CVE-2020-22655Network attack vector

Persistent firmware modification via unauthorized image write

Published Jan 20, 2023 · Updated Apr 3, 2025

Improper access control in Ruckus network-device firmware allows remote attackers to persistently write unauthorized firmware images. The image-upgrade path accepts and stores attacker-supplied firmware without enforcing the authorization needed to restrict image writes. The management interface must be network-reachable; successful exploitation persistently modifies device firmware without a reported confidentiality or availability impact.

CVSS severity7.5
High
EPSS probability0.46%
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 Ruckus network-device firmware allows remote attackers to persistently write unauthorized firmware images. The image-upgrade path accepts and stores attacker-supplied firmware without enforcing the authorization needed to restrict image writes. The management interface must be network-reachable; successful exploitation persistently modifies device firmware without a reported confidentiality or availability impact.

The record

CVE
CVE-2020-22655
Published
Jan 20, 2023
Updated
Apr 3, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-284, T1601.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 20, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5CISA ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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 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 exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
T1601.001System Firmware

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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