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CVE-2021-1571

25
FAUCET Score

CVE-2021-1571 describes multiple vulnerabilities in the web-based management interface of Cisco Small Business 220 Series Smart Switches. These vulnerabilities, including session hijacking, arbitrary command execution as root, and XSS/HTML injection, carry a CVSS score of 6.1 (Medium). While there is no known active exploitation or public exploit code, the vulnerability has garnered significant community discussion and media coverage, indicating awareness within the security community.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.2.0.6CPE matchmatch criteria
cpe:2.3:o:cisco:sf220-24_firmware:*:*:*:*:*:*:*:*
< 1.2.0.6CPE matchmatch criteria
cpe:2.3:o:cisco:sf220-24p_firmware:*:*:*:*:*:*:*:*
< 1.2.0.6CPE matchmatch criteria
cpe:2.3:o:cisco:sf220-48_firmware:*:*:*:*:*:*:*:*
< 1.2.0.6CPE matchmatch criteria
cpe:2.3:o:cisco:sf220-48p_firmware:*:*:*:*:*:*:*:*
< 1.2.0.6CPE matchmatch criteria
cpe:2.3:o:cisco:sg220-26_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.2HIGH

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.2
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
9.72%
Probability of exploitation in next 30 days
EPSS Percentile
95.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0972 is in the 98th percentile among its peer group of 26,236 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

ciscopatch availablevia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-ciscosb-multivulns-Wwyb7s5E
PatchVendor Advisory