TI-2021-01077 Aliases CVE-2021-1350 GHSA-28r8-9g34-2x25

Cisco Umbrella Dashboard Packet Flood Vulnerability

LOW 33CWE-770Published 2021-01-20 · Updated 2024-11-12

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · Low
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-770.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01297 70th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Cisco	Cisco Umbrella Insights Virtual Appliance	all versions	—	No fix listed	CNA

Cisco Umbrella Insights Virtual Appliance VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:cisco:umbrella:-:::::::*	not specified by NVD	Vulnerable	Cisco

cpe:2.3:a:cisco:umbrella:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-1350
2026-10-03 Alias added: GHSA-28r8-9g34-2x25

References

Advisory 1

20210120 Cisco Umbrella Dashboard Packet Flood Vulnerability

TI-2019-01430 Cisco Umbrella Dashboard Session Management Vulnerability CVSS 3.0HIGH 8.8
TI-2018-00394 Cisco Umbrella API Unauthorized Access Vulnerability CVSS 3.0CRITICAL 9.1
TI-2021-01201 Cisco Umbrella Link and CSV Formula Injection Vulnerabilities CVSS 3.1HIGH 8.6
TI-2021-01202 Cisco Umbrella Link and CSV Formula Injection Vulnerabilities CVSS 3.1MEDIUM 6.5
TI-2019-01417 Cisco Umbrella Cross-Site Scripting Vulnerability CVSS 3.1MEDIUM 6.1
TI-2020-02889 Cisco Umbrella Open Redirect Vulnerability CVSS 3.1MEDIUM 6.1

See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences