# CVE-2022-22164: Junos OS Evolved: Telnet service may be enabled when it is expected to be disabled.

> A bug in Junos OS Evolved prevents disabling the Telnet service, leaving it active and exposing the device to unauthorized access.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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:** 19 Jan 2022
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-56fg-32qc-v967

## What is CVE-2022-22164?

CVE-2022-22164 is a medium-severity vulnerability in Juniper Junos Os Evolved, published on 19 Jan 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An Improper Initialization vulnerability in Juniper Networks Junos OS Evolved may cause a commit operation for disabling the telnet service to not take effect as expected, resulting in the telnet service staying enabled. When it is not intended to be operating on the device, an administrator can issue the following command to verify whether telnet is operating in the background: user@device > show system connections | grep :23 tcp 0 0 0.0.0.0:23 0.0.0.0:* LISTEN 20879/xinetd This issue affects: Juniper Networks Junos OS Evolved All versions prior to 20.4R2-S2-EVO; 21.1 version 21.1R1-EVO and later versions; 21.2 versions prior to 21.2R2-EVO.

Weakness: CWE-665 (Improper Initialization)

## Which versions are affected by CVE-2022-22164?

It affects 1 product.


Products: Juniper Junos Os Evolved.

## How do I fix CVE-2022-22164?

No fix has been published for CVE-2022-22164 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-22164 being exploited?

There is no known exploitation of CVE-2022-22164 in the wild and no public exploit code.

## Other vulnerabilities in Juniper Junos Os Evolved

- [CVE-2026-21902](https://insights.sbomify.com/CVE-2026-21902/): Junos OS Evolved: PTX Series: A vulnerability allows a unauthenticated, network-based attacker to execute code as root (critical 9.3)
- [CVE-2023-28983](https://insights.sbomify.com/CVE-2023-28983/): Junos OS Evolved: Shell Injection vulnerability in the gNOI server (high 8.8)
- [CVE-2025-21599](https://insights.sbomify.com/CVE-2025-21599/): Denial of service in Junos OS Evolved (high 8.7)
- [CVE-2024-47502](https://insights.sbomify.com/CVE-2024-47502/): Junos OS Evolved: TCP session state is not always cleared on the Routing Engine leading to DoS (high 8.7)
- [CVE-2024-39531](https://insights.sbomify.com/CVE-2024-39531/): Junos OS Evolved: ACX 7000 Series: Protocol specific DDoS configuration affects other protocols (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-22164 and fix it if it is affected.

What it is: CVE-2022-22164 is a medium-severity vulnerability in Juniper Junos Os Evolved, published on 19 Jan 2022. 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-2022-22164 in the wild and no public exploit code.

Affected product: Juniper Junos Os Evolved. 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-2022-22164/ (Markdown: https://insights.sbomify.com/CVE-2022-22164/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-22164
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-22164
- OSV: https://osv.dev/vulnerability/CVE-2022-22164

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From sbomify Insights: https://insights.sbomify.com/CVE-2022-22164/
Summaries are generated and may contain mistakes; the official description above is the record.