# CVE-2021-22677: Integer overflow in SimpleLink Wi-Fi, MSP432, CC13XX, CC26XX, CC32XX, CC3100

> An integer overflow in SimpleLink Wi-Fi SDK APIs during network connection allows attackers to cause denial of service or execute arbitrary code.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 7 May 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-c99v-p88g-44f5

## What is CVE-2021-22677?

CVE-2021-22677 is a high-severity vulnerability in SimpleLink Wi-Fi, MSP432, CC13XX, CC26XX, CC32XX, CC3100, published on 7 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An integer overflow exists in the APIs of the host MCU while trying to connect to a WIFI network may lead to issues such as a denial-of-service condition or code execution on the SimpleLink Wi-Fi (MSP432E4 SDK: v4.20.00.12 and prior, CC32XX SDK v4.30.00.06 and prior, CC13X0 SDK versions prior to v4.10.03, CC13X2 and CC26XX SDK versions prior to v4.40.00, CC3200 SDK v1.5.0 and prior, CC3100 SDK v1.3.0 and prior).

Weakness: CWE-190 (Integer Overflow or Wraparound)

## Which versions are affected by CVE-2021-22677?

It affects 7 products.


Products: Ti Cc3100 Software Development Kit, Ti Cc3200 Software Development Kit, Ti Simplelink Cc13x0 Software Development Kit, Ti Simplelink Cc13x2 Software Development Kit, Ti Simplelink Cc26xx Software Development Kit, Ti Simplelink Cc32xx Software Development Kit, Ti Simplelink Msp432e4 Software Development Kit.

## How do I fix CVE-2021-22677?

No fix has been published for CVE-2021-22677 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-22677 being exploited?

There is no known exploitation of CVE-2021-22677 in the wild and no public exploit code.

## Other vulnerabilities in SimpleLink Wi-Fi, MSP432, CC13XX, CC26XX, CC32XX, CC3100

- [CVE-2021-22671](https://insights.sbomify.com/CVE-2021-22671/): Integer overflow in SimpleLink Wi-Fi, MSP432, CC13XX, CC26XX, CC32XX, CC3100 (critical 9.8)
- [CVE-2021-22679](https://insights.sbomify.com/CVE-2021-22679/): Integer overflow in SimpleLink Wi-Fi, MSP432, CC13XX, CC26XX, CC32XX, CC3100 (critical 9.8)
- [CVE-2021-22673](https://insights.sbomify.com/CVE-2021-22673/): Memory corruption in SimpleLink Wi-Fi, MSP432, CC13XX, CC26XX, CC32XX, CC3100 (high 8.0)
- [CVE-2021-22675](https://insights.sbomify.com/CVE-2021-22675/): Integer overflow in SimpleLink Wi-Fi, MSP432, CC13XX, CC26XX, CC32XX, CC3100 (high 7.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-22677 and fix it if it is affected.

What it is: CVE-2021-22677 is a high-severity vulnerability in SimpleLink Wi-Fi, MSP432, CC13XX, CC26XX, CC32XX, CC3100, published on 7 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-22677 in the wild and no public exploit code.

Affected product: SimpleLink Wi-Fi, MSP432, CC13XX, CC26XX, CC32XX, CC3100. 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-2021-22677/ (Markdown: https://insights.sbomify.com/CVE-2021-22677/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-22677
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-22677
- OSV: https://osv.dev/vulnerability/CVE-2021-22677

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-22677/
Summaries are generated and may contain mistakes; the official description above is the record.