CVE-2026-1409Public exploit

Diagnostic shell access via unlimited UART login attempts

Published Jan 25, 2026 · Updated Jan 25, 2026

Authentication throttling failure in Beetel 777VR1 01.00.09 and 01.00.09_55 allows physically proximate attackers to access the diagnostic shell. The UART diagnostic login accepts unlimited credential attempts without rate limiting, delay, or account lockout. Physical access to the device's UART pins is required, and successful password guessing exposes the administrative diagnostic shell.

CVSS severity4.2
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication throttling failure in Beetel 777VR1 01.00.09 and 01.00.09_55 allows physically proximate attackers to access the diagnostic shell. The UART diagnostic login accepts unlimited credential attempts without rate limiting, delay, or account lockout. Physical access to the device's UART pins is required, and successful password guessing exposes the administrative diagnostic shell.

The record

CVE
CVE-2026-1409
Published
Jan 25, 2026
Updated
Jan 25, 2026
Vendor
Beetel Teletech Limited
Product
777VR1 Firmware
Classifications
CWE-307, CWE-799, CAPEC-49, T1110.001
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 25, 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=01.00.09
  2. Affected versionversion=01.00.09_55

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Beetel Teletech Limited · 777VR1 Firmwareversion=01.00.09; version=01.00.09_55

Published CVSS scores

2.0VulDBCVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
1.2VulDBAV:L/AC:H/Au:N/C:P/I:N/A:N
0.3VulDBCVSS:4.0/AV:P/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
4.2NIST NVDCVSS:3.1/AV:P/AC:H/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-307Improper Restriction of Excessive Authentication Attempts
CWE-799Improper Control of Interaction Frequency
CAPEC-49Password Brute Forcing
T1110.001Brute Force: Password Guessing

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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