CVE-2026-36176Public exploit

Cloud token disclosure via plaintext UART logging

Published Jun 4, 2026 · Updated Jun 4, 2026

Cleartext credential exposure in GNCC GP5 7.1.76 allows physically proximate attackers to capture active cloud upload tokens via UART. During boot and synchronization, the cloud-sync application logs the complete pre-authorized Backblaze B2 upload URL, including its live authorization token, to the serial console. Physical access to the UART interface is required; a captured PUT token permits unauthorized cloud-storage uploads within the token's assigned scope.

CVSS severity7.1
High
EPSS probability0.09%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cleartext credential exposure in GNCC GP5 7.1.76 allows physically proximate attackers to capture active cloud upload tokens via UART. During boot and synchronization, the cloud-sync application logs the complete pre-authorized Backblaze B2 upload URL, including its live authorization token, to the serial console. Physical access to the UART interface is required; a captured PUT token permits unauthorized cloud-storage uploads within the token's assigned scope.

The record

CVE
CVE-2026-36176
Published
Jun 4, 2026
Updated
Jun 4, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-312, T1552
Attack vector
physical
Privileges
Unavailable

Timeline

How it unfolded

  1. Jun 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 4, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorphysical
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.1CISA-ADPCVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-312Cleartext Storage of Sensitive Information
T1552Unsecured Credentials

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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