Medium severity5.3NVD Advisory· Published Jan 20, 2021· Updated Jun 17, 2026

CVE-2021-1350

Description

A vulnerability in the web UI of Cisco Umbrella could allow an unauthenticated, remote attacker to negatively affect the performance of this service. The vulnerability exists due to insufficient rate limiting controls in the web UI. An attacker could exploit this vulnerability by sending crafted HTTPS packets at a high and sustained rate. A successful exploit could allow the attacker to negatively affect the performance of the web UI. Cisco has addressed this vulnerability.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Cisco Systems, Inc./Umbrella2 versions
cpe:2.3:a:cisco:umbrella:-:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:cisco:umbrella:-:*:*:*:*:*:*:*
- (no CPE)
Cisco Systems, Inc./Umbrella Insights Virtual Appliancecpe-rescue
Range: n/a

Patches

Vulnerability mechanics

References

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-umb-dos-dgKzDEBPnvdVendor Advisory

News mentions

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cvss	0.345
epss	0.001
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000