CVE-2024-27571Public exploitNetwork attack vector

Service interruption via unchecked ApCliSsid copy

Published Mar 1, 2024 · Updated Aug 22, 2024

A stack overflow in the Rc program of LBT-T300-T390 Firmware 2.2.1.8 allows remote authenticated users to interrupt router service via POST. The makeCurRemoteApList function passes the nvram_get value for ApCliSsid directly to strcpy without validating its length before copying it into a stack buffer. The published request reaches /apply.cgi with HTTP Basic credentials, and the documented consequence is limited to service interruption.

CVSS severity7.5
High
EPSS probability0.72%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A stack overflow in the Rc program of LBT-T300-T390 Firmware 2.2.1.8 allows remote authenticated users to interrupt router service via POST. The makeCurRemoteApList function passes the nvram_get value for ApCliSsid directly to strcpy without validating its length before copying it into a stack buffer. The published request reaches /apply.cgi with HTTP Basic credentials, and the documented consequence is limited to service interruption.

The record

CVE
CVE-2024-27571
Published
Mar 1, 2024
Updated
Aug 22, 2024
Vendor
Shenzhen Libituo Technology Co., Ltd.
Product
LBT-T300-T390 Firmware
Classifications
CWE-121, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 1, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 22, 2024Record 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=2.2.1.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shenzhen Libituo Technology Co., Ltd. · LBT-T300-T390 Firmwareversion=2.2.1.8

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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