# CVE-2026-20113: Other in Cisco IOS XE Software

> Unauthenticated remote attackers can inject CRLF sequences to manipulate or obscure log entries in Cisco IOS XE web management interfaces.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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:** Not needed
- **Fix available:** No
- **Published:** 25 Mar 2026
- **Updated:** 27 Mar 2026
- **Also known as:** GHSA-c9q8-fg52-4crv

## What is CVE-2026-20113?

CVE-2026-20113 is a medium-severity vulnerability in Cisco IOS XE Software, published on 25 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability in the web-based Cisco IOx application hosting environment management interface of Cisco IOS XE Software could allow an unauthenticated, remote attacker to perform a carriage return line feed (CRLF) injection attack against a user.

 This vulnerability is due to insufficient validation of user input. An attacker could exploit this vulnerability by sending crafted packets to an affected device. A successful exploit could allow the attacker to arbitrarily inject log entries, manipulate the structure of log files, or obscure legitimate log events.

Weakness: CWE-93 (Improper Neutralization of CRLF Sequences)

## Which versions are affected by CVE-2026-20113?


## How do I fix CVE-2026-20113?

No fix has been published for CVE-2026-20113 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-20113 being exploited?

There is no known exploitation of CVE-2026-20113 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-20113 and fix it if it is affected.

What it is: CVE-2026-20113 is a medium-severity vulnerability in Cisco IOS XE Software, published on 25 Mar 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-2026-20113 in the wild and no public exploit code.

Affected product: Cisco IOS XE Software. 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-2026-20113/ (Markdown: https://insights.sbomify.com/CVE-2026-20113/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-20113
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-20113
- OSV: https://osv.dev/vulnerability/CVE-2026-20113

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-20113/
Summaries are generated and may contain mistakes; the official description above is the record.