# CVE-2026-76454: Cisco Smart Software Manager On-Prem Unauthenticated API Vulnerability

> Unauthenticated remote attackers can write arbitrary files or cause denial of service in Cisco License On-Prem due to improper input validation.

- **Severity:** Critical 9.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 7 Oct 2026
- **Updated:** 7 Oct 2026
- **Also known as:** GHSA-p5v8-p64j-pj8c

## What is CVE-2026-76454?

CVE-2026-76454 is a critical path traversal vulnerability in Cisco License On-Prem, published on 7 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability in the Cisco Smart Licensing Utility API of Cisco License On-Prem, formerly Cisco Smart Software Manager On-Prem (SSM On-Prem), could allow an unauthenticated, remote attacker to write arbitrary files to the system or cause a DoS condition on an affected application.

This vulnerability is due to improper input validation and a lack of authentication in the management API. An attacker could exploit this vulnerability by sending a crafted request to the affected API. A successful exploit could allow the attacker to modify system files or cause a DoS condition.

Weakness: CWE-23 (Relative Path Traversal)

## Which versions are affected by CVE-2026-76454?


## How do I fix CVE-2026-76454?

No fix has been published for CVE-2026-76454 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-76454 being exploited?

There is no known exploitation of CVE-2026-76454 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-76454 and fix it if it is affected.

What it is: CVE-2026-76454 is a critical path traversal vulnerability in Cisco License On-Prem, published on 7 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-76454 in the wild and no public exploit code.

Affected product: Cisco License On-Prem. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-76454/ (Markdown: https://insights.sbomify.com/CVE-2026-76454/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-76454
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-76454
- OSV: https://osv.dev/vulnerability/CVE-2026-76454

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-76454/
Summaries are generated and may contain mistakes; the official description above is the record.