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CVE-2021-1571

Cisco Small Business 220 Series Smart Switches Vulnerabilities

MEDIUM
6.1
CVSS Score
Published: June 16, 2021 at 05:45 PM UTC
Updated: June 17, 2026 at 03:32 AM UTC
19 products affected across 1 vendorSf220-48p FirmwareSg220-26p FirmwareSg220-28mp Firmware

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Severity
MEDIUM6.1
Exploit prediction
EPSS 10%
SSVC
No known exploit

Description

Multiple vulnerabilities in the web-based management interface of Cisco Small Business 220 Series Smart Switches could allow an attacker to do the following: Hijack a user session Execute arbitrary commands as a root user on the underlying operating system Conduct a cross-site scripting (XSS) attack Conduct an HTML injection attack For more information about these vulnerabilities, see the Details section of this advisory.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Sf220-24 Firmware· Cisco
95%
v < 1.2.0.6
Affected range stops below 1.2.0.6, so it looks safe — our inference, not a vendor statement
cisco-sf220-24 (same device)
Sf220-24p Firmware· Cisco
95%
v < 1.2.0.6
Affected range stops below 1.2.0.6, so it looks safe — our inference, not a vendor statement
cisco-sf220-24p (same device)
Sf220-48 Firmware· Cisco
95%
v < 1.2.0.6
Affected range stops below 1.2.0.6, so it looks safe — our inference, not a vendor statement
cisco-sf220-48 (same device)
Sf220-48p Firmware· Cisco
95%
v < 1.2.0.6
Affected range stops below 1.2.0.6, so it looks safe — our inference, not a vendor statement
cisco-sf220-48p (same device)
Sg220-26 Firmware· Cisco
95%
v < 1.2.0.6
Affected range stops below 1.2.0.6, so it looks safe — our inference, not a vendor statement
cisco-sg220-26 (same device)
Sg220-26p Firmware· Cisco
95%
v < 1.2.0.6
Affected range stops below 1.2.0.6, so it looks safe — our inference, not a vendor statement
cisco-sg220-26p (same device)
Sg220-28mp Firmware· Cisco
95%
v < 1.2.0.6
Affected range stops below 1.2.0.6, so it looks safe — our inference, not a vendor statement
cisco-sg220-28mp (same device)
Sg220-50 Firmware· Cisco
95%
v < 1.2.0.6
Affected range stops below 1.2.0.6, so it looks safe — our inference, not a vendor statement
cisco-sg220-50 (same device)
Sg220-50p Firmware· Cisco
95%
v < 1.2.0.6
Affected range stops below 1.2.0.6, so it looks safe — our inference, not a vendor statement
cisco-sg220-50p (same device)
Small Business 220-series Smart Switches· Cisco
60%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisoryx_refsource_CISCOPatch
Source: [email protected]
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ciscosb-multivulns-Wwyb7s5E

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.1MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-287CWE-79

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