CVE-2021-34744Network attack vector

Credential disclosure via static firmware-wide cryptographic key

Published Oct 6, 2021 · Updated Nov 7, 2024

Information disclosure in Cisco Business 220 Series firmware 1.2.0.6 and earlier allows remote authenticated users to obtain login credentials. Every firmware image uses the same static cryptographic key, enabling an administrator to access encrypted passwords through the web interface and recover credentials. The interface is enabled by default, but exploitation requires Administrator privileges; exposed credentials can belong to other applications.

CVSS severity4.9
Medium
EPSS probability0.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Cisco Business 220 Series firmware 1.2.0.6 and earlier allows remote authenticated users to obtain login credentials. Every firmware image uses the same static cryptographic key, enabling an administrator to access encrypted passwords through the web interface and recover credentials. The interface is enabled by default, but exploitation requires Administrator privileges; exposed credentials can belong to other applications.

The record

CVE
CVE-2021-34744
Published
Oct 6, 2021
Updated
Nov 7, 2024
Vendor
ClamAV
Product
Cisco 220 Series Smart Plus Switches
Classifications
CWE-540, CWE-798, T1555
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Oct 6, 2021CVE publishedPublication date reported by the CVE source.
  2. Nov 7, 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 privilegesadmin

What is affected?

ClamAV · Cisco 220 Series Smart Plus Switchesversion=n/a

Published CVSS scores

4.9CiscoCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
4.0NVDAV:N/AC:L/Au:S/C:P/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-540Inclusion of Sensitive Information in Source Code
CWE-798Use of Hard-coded Credentials
T1555Credentials from Password Stores

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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