# CVE-2026-8987: Authenticated Heap Overflow

> An authenticated attacker can trigger a heap overflow in the Autel Maxi Charger Single firmware, causing denial of service or arbitrary code execution.

- **Severity:** Critical 9.4 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Jul 2026
- **Updated:** 22 Jul 2026
- **Also known as:** GHSA-qh3x-7q6p-6x7f

## What is CVE-2026-8987?

CVE-2026-8987 is a critical memory corruption vulnerability in Autel MaxiCharger Single, published on 21 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Autel Maxi Charger Single firmware through V1.03.51 contains a heap-based buffer overflow in the set_ap_param command handled by the /localcfg endpoint. An authenticated attacker can supply oversized input, resulting in denial of service and potentially arbitrary code execution.

Weakness: CWE-122 (Heap-based Buffer Overflow)

## Which versions are affected by CVE-2026-8987?

It affects 1 product.


Products: Autel Maxicharger Single Charger Firmware.

## How do I fix CVE-2026-8987?

No fix has been published for CVE-2026-8987 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-8987 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-8987 exists.

## Other vulnerabilities in Autel MaxiCharger Single

- [CVE-2026-8982](https://insights.sbomify.com/CVE-2026-8982/): Hard-coded / Backdoor Accounts (critical 10.0)
- [CVE-2026-8983](https://insights.sbomify.com/CVE-2026-8983/): Backdoor Authentication Token (critical 10.0)
- [CVE-2026-8984](https://insights.sbomify.com/CVE-2026-8984/): Unauthenticated RCE (critical 10.0)
- [CVE-2026-8985](https://insights.sbomify.com/CVE-2026-8985/): Unauthenticated Command Injection (critical 10.0)
- [CVE-2026-8986](https://insights.sbomify.com/CVE-2026-8986/): Command Injection via Malicious OCPP Server (critical 9.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-8987 and fix it if it is affected.

What it is: CVE-2026-8987 is a critical memory corruption vulnerability in Autel MaxiCharger Single, published on 21 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-8987 exists.

Affected product: Autel MaxiCharger Single. 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-2026-8987/ (Markdown: https://insights.sbomify.com/CVE-2026-8987/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-8987
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-8987
- OSV: https://osv.dev/vulnerability/CVE-2026-8987

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-8987/
Summaries are generated and may contain mistakes; the official description above is the record.