CVE-2026-13309

Physical code execution via NFC response overflow

Published Jul 29, 2026 · Updated Jul 29, 2026

Stack-based buffer overflow in Autel MaxiCharger AC Elite Home 1.39.51 allows physically proximate attackers to execute device code via NFC. The NFC card-response handler overflows its fixed-length stack buffer when processing a crafted response. Physical NFC proximity is required, but authentication and user interaction are not; successful exploitation runs code in the device context.

CVSS severity6.8
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in Autel MaxiCharger AC Elite Home 1.39.51 allows physically proximate attackers to execute device code via NFC. The NFC card-response handler overflows its fixed-length stack buffer when processing a crafted response. Physical NFC proximity is required, but authentication and user interaction are not; successful exploitation runs code in the device context.

The record

CVE
CVE-2026-13309
Published
Jul 29, 2026
Updated
Jul 29, 2026
Vendor
Autel
Product
MaxiCharger AC Elite Home
Classifications
CWE-121
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.39.51

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Autel · MaxiCharger AC Elite Homeversion=1.39.51

Published CVSS scores

6.8Zero Day InitiativeCVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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