Cisco Business 220 Series Smart Switches Static Key and Password Vulnerabilities

published 2021-10-06 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-21407

cvss: 4.9; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits: 0; none known

Multiple vulnerabilities in Cisco Business 220 Series Smart Switches firmware could allow an attacker with Administrator privileges to access sensitive login credentials or reconfigure the passwords on the user account. For more information about these vulnerabilities, see the Details section of this advisory.

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-11-07)

Exploit prediction

0.62% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	4.9	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
NVD	3.1	5.5	CVSS:3.1/AV:P/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
NVD	2.0	3.6	AV:L/AC:L/Au:N/C:P/I:P/A:N

Affected products

Cisco Cisco Small Business 220 Series Smart Plus Switches

Classification

Weakness

CWE-540 Inclusion of Sensitive Information in Source Code
CWE-798 Use of Hard-coded Credentials

References

tools.cisco.com /security/center/content/CiscoSecurityAdvisory/cisco-sa-sb-hardcoded-cred-MJCEXvX
vendor-advisory

Sources

CVE List CVE-2021-34757
NVD CVE-2021-34757

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Summary