Quick answers
- Is CVE-2026-13309 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-13309 being exploited in the wild.
- How severe is CVE-2026-13309?
- Medium severity, with a CVSS score of 6.8, published 29 July 2026.
- Which products and versions are affected?
- Autel MaxiCharger AC Elite Home 1.39.51.
- Is there a fix for CVE-2026-13309?
- A patch was published on 2026-07-15: Fixed in firmware version V1.40.81 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-13309 attacked?
- It is attacked with physical access, in a network appliance.
- Am I affected by CVE-2026-13309?
- Check whether you run Autel MaxiCharger AC Elite Home at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A stack-based buffer overflow vulnerability exists in the NFC stack of the Autel MaxiCharger AC Elite Home EV charger. The flaw is located in the handling of card responses via the NFC interface, where the system fails to properly validate the length of data before copying it into a fixed-length stack buffer. A physically present attacker can exploit this by presenting a malicious NFC card that provides a crafted response, leading to arbitrary code execution in the context of the device. No authentication or user interaction is required beyond the physical proximity needed to interact with the NFC reader. The vulnerability is addressed in firmware version V1.40.81.
Affected products
- Autel MaxiCharger AC Elite Home 1.39.51
Timeline
- 2026-03-19: disclosed: Vulnerability reported to vendor
- 2026-07-15: patched: Fixed in firmware version V1.40.81
- 2026-07-15: advisory: Coordinated public release of advisory by ZDI
- 2026-07-29: other: NVD publication date