# CVE-2021-1614: Cisco SD-WAN Software Information Disclosure Vulnerability

> Unauthenticated remote attackers can read sensitive MPLS buffer memory by sending crafted packets to Cisco SD-WAN devices.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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:** 22 Jul 2021
- **Updated:** 7 Nov 2024
- **Also known as:** GHSA-8m79-xg2c-ggjm

## What is CVE-2021-1614?

CVE-2021-1614 is a medium-severity vulnerability in Cisco SD-WAN Solution, published on 22 Jul 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability in the Multiprotocol Label Switching (MPLS) packet handling function of Cisco SD-WAN Software could allow an unauthenticated, remote attacker to gain access to information stored in MPLS buffer memory. This vulnerability is due to insufficient handling of malformed MPLS packets that are processed by a device that is running Cisco SD-WAN Software. An attacker could exploit this vulnerability by sending a crafted MPLS packet to an affected device that is running Cisco SD-WAN Software or Cisco SD-WAN vManage Software. A successful exploit could allow the attacker to gain unauthorized access to sensitive information.

Weakness: CWE-126 (Buffer Over-read)

## Which versions are affected by CVE-2021-1614?

It affects 1 product.


Products: Cisco Sd-Wan.

## How do I fix CVE-2021-1614?

No fix has been published for CVE-2021-1614 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-1614 being exploited?

There is no known exploitation of CVE-2021-1614 in the wild and no public exploit code.

## Other vulnerabilities in Cisco SD-WAN Solution

- [CVE-2020-3374](https://insights.sbomify.com/CVE-2020-3374/): Cisco SD-WAN vManage Software Authorization Bypass Vulnerability (critical 9.9)
- [CVE-2018-15387](https://insights.sbomify.com/CVE-2018-15387/): Cisco SD-WAN Solution Certificate Validation Bypass Vulnerability (critical 9.8)
- [CVE-2019-1624](https://insights.sbomify.com/CVE-2019-1624/): Cisco SD-WAN Solution Command Injection Vulnerability (high 8.8)
- [CVE-2019-1650](https://insights.sbomify.com/CVE-2019-1650/): Cisco SD-WAN Solution Arbitrary File Overwrite Vulnerability (high 8.8)
- [CVE-2020-3180](https://insights.sbomify.com/CVE-2020-3180/): Cisco SD-WAN Solution Software Static Credentials Vulnerability (high 8.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-1614 and fix it if it is affected.

What it is: CVE-2021-1614 is a medium-severity vulnerability in Cisco SD-WAN Solution, published on 22 Jul 2021. 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-2021-1614 in the wild and no public exploit code.

Affected product: Cisco SD-WAN Solution. 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-2021-1614/ (Markdown: https://insights.sbomify.com/CVE-2021-1614/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-1614
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-1614
- OSV: https://osv.dev/vulnerability/CVE-2021-1614

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-1614/
Summaries are generated and may contain mistakes; the official description above is the record.