CVE-2026-38571Public exploit

Credential disclosure and memory access via unauthenticated UART

Published Jun 26, 2026 · Updated Jun 26, 2026

Cleartext credential exposure in Tenda N300 F3 firmware V603 allows physically proximate attackers to obtain stored WPA2 keys via UART. The unauthenticated debug console emits credentials during boot and exposes rr and wr commands that read or write arbitrary memory without an authorization check. Physical access to the serial pins is required; successful use discloses Wi-Fi credentials and permits direct memory modification on the router.

CVSS severity4.6
Medium
EPSS probability0.15%
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 Tenda N300 F3 firmware V603 allows physically proximate attackers to obtain stored WPA2 keys via UART. The unauthenticated debug console emits credentials during boot and exposes rr and wr commands that read or write arbitrary memory without an authorization check. Physical access to the serial pins is required; successful use discloses Wi-Fi credentials and permits direct memory modification on the router.

The record

CVE
CVE-2026-38571
Published
Jun 26, 2026
Updated
Jun 26, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-312, T1555
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 26, 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.6NIST NVDCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-312Cleartext Storage of Sensitive Information
T1555Credentials from Password Stores

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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