# CVE-2019-1759: Cisco IOS XE Software Gigabit Ethernet Management Interface Access Control List Bypass Vulnerability

> Unauthenticated remote attackers can bypass ACLs on the Gigabit Ethernet Management interface to reach configured IP addresses.

- **Severity:** Medium 5.3 (`CVSS:3.0/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:** 28 Mar 2019
- **Updated:** 19 Nov 2024
- **Also known as:** GHSA-4pjp-5725-8mxh

## What is CVE-2019-1759?

CVE-2019-1759 is a medium-severity authentication bypass vulnerability in Cisco Ios Xe, published on 28 Mar 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability in access control list (ACL) functionality of the Gigabit Ethernet Management interface of Cisco IOS XE Software could allow an unauthenticated, remote attacker to reach the configured IP addresses on the Gigabit Ethernet Management interface. The vulnerability is due to a logic error that was introduced in the Cisco IOS XE Software 16.1.1 Release, which prevents the ACL from working when applied against the management interface. An attacker could exploit this issue by attempting to access the device via the management interface.

Weakness: CWE-287 (Improper Authentication), CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2019-1759?

It affects 1 product.


Products: Cisco Ios Xe.

## How do I fix CVE-2019-1759?

No fix has been published for CVE-2019-1759 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-1759 being exploited?

There is no known exploitation of CVE-2019-1759 in the wild and no public exploit code.

Public exploit code:

- Bolt-cms 3.6.10 Csrf -> xss -> rce (github_poc): https://github.com/r3m0t3nu11/CVE-2019-1759-csrf-js-rce

## Other vulnerabilities in Cisco Ios Xe

- [CVE-2023-20198](https://insights.sbomify.com/CVE-2023-20198/): Cisco IOS XE Web UI Privilege Escalation (critical 10.0, exploited in the wild)
- [CVE-2018-0151](https://insights.sbomify.com/CVE-2018-0151/): Cisco IOS Software and Cisco IOS XE Software Quality of Service Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2023-20273](https://insights.sbomify.com/CVE-2023-20273/): Cisco IOS XE Web UI Command Injection (high 7.2, exploited in the wild)
- [CVE-2025-20188](https://insights.sbomify.com/CVE-2025-20188/): Hardcoded credentials in Cisco IOS XE Software (critical 10.0)
- [CVE-2021-34770](https://insights.sbomify.com/CVE-2021-34770/): Cisco IOS XE Software for Catalyst 9000 Family Wireless Controllers CAPWAP Remote Code Execution Vulnerability (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-1759 and fix it if it is affected.

What it is: CVE-2019-1759 is a medium-severity authentication bypass vulnerability in Cisco Ios Xe, published on 28 Mar 2019. 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-2019-1759 in the wild and no public exploit code.

Affected product: Cisco Ios Xe. 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-2019-1759/ (Markdown: https://insights.sbomify.com/CVE-2019-1759/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-1759
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-1759
- OSV: https://osv.dev/vulnerability/CVE-2019-1759

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-1759/
Summaries are generated and may contain mistakes; the official description above is the record.