# CVE-2026-20123: Cisco Prime Infrastructure and Evolved Programmable Network Manager Open Redirect Vulnerability

> An unauthenticated remote attacker can redirect users to malicious web pages via improper input validation in Cisco network management interfaces.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 4 Feb 2026
- **Updated:** 4 Feb 2026
- **Also known as:** GHSA-8vw9-4phq-rr32

## What is CVE-2026-20123?

CVE-2026-20123 is a medium-severity vulnerability in Cisco Evolved Programmable Network Manager, published on 4 Feb 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

A vulnerability in the web-based management interface of Cisco Evolved Programmable Network Manager (EPNM) and Cisco Prime Infrastructure could allow an unauthenticated, remote attacker to redirect a user to a malicious web page.

This vulnerability is due to improper input validation of the parameters in the HTTP request. An attacker could exploit this vulnerability by intercepting and modifying an HTTP request from a user. A successful exploit could allow the attacker to redirect the user to a malicious web page.

Weakness: CWE-601 (URL Redirection to Untrusted Site)

## Which versions are affected by CVE-2026-20123?

It affects 2 products.


Products: Cisco Evolved Programmable Network Manager, Cisco Prime Infrastructure.

## How do I fix CVE-2026-20123?

No fix has been published for CVE-2026-20123 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-20123 being exploited?

There is no known exploitation of CVE-2026-20123 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Evolved Programmable Network Manager

- [CVE-2016-1289](https://insights.sbomify.com/CVE-2016-1289/): Code injection in n/a (critical 9.8)
- [CVE-2016-1291](https://insights.sbomify.com/CVE-2016-1291/): Deserialization in n/a (critical 9.8)
- [CVE-2021-1487](https://insights.sbomify.com/CVE-2021-1487/): Cisco Prime Infrastructure and Cisco Evolved Programmable Network Manager Command Injection Vulnerability (high 8.8)
- [CVE-2019-1821](https://insights.sbomify.com/CVE-2019-1821/): Cisco Prime Infrastructure and Evolved Programmable Network Manager Remote Code Execution Vulnerabilities (high 8.8)
- [CVE-2019-1822](https://insights.sbomify.com/CVE-2019-1822/): Cisco Prime Infrastructure and Evolved Programmable Network Manager Remote Code Execution Vulnerabilities (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-20123 and fix it if it is affected.

What it is: CVE-2026-20123 is a medium-severity vulnerability in Cisco Evolved Programmable Network Manager, published on 4 Feb 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-20123 in the wild and no public exploit code.

Affected product: Cisco Evolved Programmable Network Manager. 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-2026-20123/ (Markdown: https://insights.sbomify.com/CVE-2026-20123/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-20123
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-20123
- OSV: https://osv.dev/vulnerability/CVE-2026-20123

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-20123/
Summaries are generated and may contain mistakes; the official description above is the record.