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CVE-2025-5826: Autel MaxiCharger AC Wallbox Commercial ble_process_esp32_msg Misinterpretation of Input Vulnerability

27
Routine
MEDIUM 6.3UPGRADEUPGRADEUPGRADE

CVE-2025-5826 is a medium-severity flaw (CVSS 6.3) affecting maxicharger ac elite business c50 firmware, maxicharger ac pro firmware, maxicharger ac ultra firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Autel MaxiCharger AC Wallbox Commercial ble_process_esp32_msg Misinterpretation of Input Vulnerability. This vulnerability allows network-adjacent attackers to inject arbitrary AT commands on affected installations of Autel MaxiCharger AC Wallbox Commercial charging stations. Authentication is not required to exploit this vulnerability. The specific flaw exists within the ble_process_esp32_msg function. The issue results from misinterpretation o

Why this priority

  • No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score6.3 (Medium)
Attack vectorAdjacent network
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance0.3% (top 80%)
CISA exploited listNo
WeaknessCWE-115
Published2025-06-25
Last modified2026-06-17
Publisher (CNA): Zero Day Initiative · Vendor: autel

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Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

autel maxicharger ac elite business c50 firmware UPGRADE
Affected: < 1.39.51 · < 1.56.51
Fixed in: 1.39.51, 1.56.51
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
autel maxicharger ac pro firmware UPGRADE
Affected: < 1.39.51 · < 1.56.51
Fixed in: 1.39.51, 1.56.51
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
autel maxicharger ac ultra firmware UPGRADE
Affected: < 1.39.51 · < 1.56.51
Fixed in: 1.39.51, 1.56.51
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
autel maxicharger dc compact mobile firmware UPGRADE
Affected: < 1.39.51 · < 1.56.51
Fixed in: 1.39.51, 1.56.51
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
autel maxicharger dc compact pedestal firmware UPGRADE
Affected: < 1.39.51 · < 1.56.51
Fixed in: 1.39.51, 1.56.51
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
autel maxicharger dc fast firmware UPGRADE
Affected: < 1.39.51 · < 1.56.51
Fixed in: 1.39.51, 1.56.51
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-5826?

maxicharger ac elite business c50 firmware: upgrade to 1.39.51, 1.56.51; maxicharger ac pro firmware: upgrade to 1.39.51, 1.56.51; maxicharger ac ultra firmware: upgrade to 1.39.51, 1.56.51. Exact commands for each OS are on this page.

Is CVE-2025-5826 being exploited?

CVE-2025-5826 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-5826 affect?

CVE-2025-5826 affects maxicharger ac elite business c50 firmware, maxicharger ac pro firmware, maxicharger ac ultra firmware. Severity is medium (CVSS 6.3). Autel MaxiCharger AC Wallbox Commercial ble_process_esp32_msg Misinterpretation of Input Vulnerability. This vulnerability allows network-adjacent attackers to inject arbitrary AT commands on affected installations of Autel MaxiCharger AC W

How urgent is CVE-2025-5826?

Priority 27/100. No elevated risk signals yet.

Related CVEs

References

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