CVE-2025-65731Public exploit

Root command execution via unauthenticated UART terminal

Published Jan 8, 2026 · Updated Jan 8, 2026

Missing authentication in D-Link DIR-605L F1 firmware V6.02CN02 allows physically proximate attackers to execute root commands via UART. The serial debug interface exposes an interactive Linux root shell during or after boot without requiring a password or authorization check. Exploitation requires opening the router and connecting a serial adapter to its UART pins, after which the attacker can read or alter configuration and run persistent software.

CVSS severity6.8
Medium
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in D-Link DIR-605L F1 firmware V6.02CN02 allows physically proximate attackers to execute root commands via UART. The serial debug interface exposes an interactive Linux root shell during or after boot without requiring a password or authorization check. Exploitation requires opening the router and connecting a serial adapter to its UART pins, after which the attacker can read or alter configuration and run persistent software.

The record

CVE
CVE-2025-65731
Published
Jan 8, 2026
Updated
Jan 8, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-306, CWE-1191, T1059
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 8, 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

6.8CISA-ADPCVSS:3.1/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
CWE-1191On-Chip Debug and Test Interface With Improper Access Control
T1059Command and Scripting Interpreter

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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