File Writing and DoS Vulnerability in Cisco License On-Prem
CVE-2026-76454

9.1CRITICAL

Key Information:

Vendor

Cisco
Status
Cisco License On-prem
Vendor
CVE Published:
7 October 2026

Badges

👾 Exploit Exists

What is CVE-2026-76454?

A vulnerability exists in the Cisco License On-Prem API, allowing potential unauthorized access to write arbitrary files or induce a denial of service (DoS) condition. This flaw arises from inadequate input validation and authentication controls within the management API. Attackers can exploit this weakness by sending a specially crafted request, leading to unauthorized modifications of system files or causing application disruptions.

Affected Version(s)

Cisco License On-Prem 7-202001

Cisco License On-Prem 1.1

Cisco License On-Prem 6.3.0

References

https://sec.cloudapps.cisco.com/security/center/content/C...

CVSS V3.1

Score:
9.1
Severity:
CRITICAL
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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