# CVE-2023-49042: Memory corruption in n/a

> A remote attacker can execute arbitrary code on Tenda AX1803 routers via a heap overflow in the setSchedWifi function.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 27 Nov 2023
- **Updated:** 2 Aug 2024
- **Also known as:** GHSA-6mpw-r8r8-xcw2

## What is CVE-2023-49042?

CVE-2023-49042 is a critical memory corruption vulnerability in Tenda Ax1803 Firmware, published on 27 Nov 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Heap Overflow vulnerability in Tenda AX1803 v.1.0.0.1 allows a remote attacker to execute arbitrary code via the schedStartTime parameter or the schedEndTime parameter in the function setSchedWifi.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2023-49042?

It affects 1 product.


Products: Tenda Ax1803 Firmware.

## How do I fix CVE-2023-49042?

No fix has been published for CVE-2023-49042 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-49042 being exploited?

There is no known exploitation of CVE-2023-49042 in the wild and no public exploit code.

## Other vulnerabilities in Tenda Ax1803 Firmware

- [CVE-2024-30620](https://insights.sbomify.com/CVE-2024-30620/): Memory corruption in n/a (critical 9.8)
- [CVE-2023-51952](https://insights.sbomify.com/CVE-2023-51952/): Memory corruption in n/a (critical 9.8)
- [CVE-2023-51953](https://insights.sbomify.com/CVE-2023-51953/): Memory corruption in n/a (critical 9.8)
- [CVE-2023-51954](https://insights.sbomify.com/CVE-2023-51954/): Memory corruption in n/a (critical 9.8)
- [CVE-2023-51956](https://insights.sbomify.com/CVE-2023-51956/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-49042 and fix it if it is affected.

What it is: CVE-2023-49042 is a critical memory corruption vulnerability in Tenda Ax1803 Firmware, published on 27 Nov 2023. 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-2023-49042 in the wild and no public exploit code.

Affected product: Tenda Ax1803 Firmware. 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-2023-49042/ (Markdown: https://insights.sbomify.com/CVE-2023-49042/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-49042
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-49042
- OSV: https://osv.dev/vulnerability/CVE-2023-49042

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-49042/
Summaries are generated and may contain mistakes; the official description above is the record.