TI-2021-01234 Aliases CVE-2021-1507 GHSA-c27h-mm4h-h764

Cisco SD-WAN vManage API Stored Cross-Site Scripting Vulnerability

LOW 29CWE-79Published 2021-05-06 · Updated 2024-11-08

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

A vulnerability in an API of Cisco SD-WAN vManage Software could allow an authenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack against users of the application web-based interface. This vulnerability exists because the API does not properly validate user-supplied input. An attacker could exploit this vulnerability by sending malicious input to the API. A successful exploit could allow the attacker to execute arbitrary script code in the context of the web-based interface or access sensitive, browser-based information.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00635 50th 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: No
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 SD-WAN vManage	all versions	—	No fix listed	CNA

Cisco SD-WAN vManage VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:cisco:sd-wan_vmanage::::::::	before 20.5.1	Vulnerable	Cisco

cpe:2.3:a:cisco:sd-wan_vmanage:*:*:*:*:*:*:*:* Versions before 20.5.1 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-1507
2026-10-03 Alias added: GHSA-c27h-mm4h-h764
2026-10-25 EPSS moved to the 50th–90th percentile

References

Advisory 1

20210505 Cisco SD-WAN vManage API Stored Cross-Site Scripting Vulnerability

TI-2021-19919 Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints KEVCVSS 3.1CRITICAL 10.0
TI-2022-05377 Cisco SD-WAN Software Privilege Escalation Vulnerabilities CVSS 3.1HIGH 7.8
TI-2021-01195 Cisco SD-WAN vManage Software Vulnerabilities CVSS 3.1CRITICAL 9.8
TI-2021-01002 Cisco SD-WAN vManage Software Vulnerabilities CVSS 3.1CRITICAL 9.8
TI-2021-01235 Cisco SD-WAN vManage Software Vulnerabilities CVSS 3.1CRITICAL 9.8
TI-2021-01233 Cisco SD-WAN vManage Software Vulnerabilities CVSS 3.1CRITICAL 9.8

See all 41 →

Sources

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