CVE-2024-27569Public exploit

Service interruption via oversized ApCliSsid value

Published Mar 1, 2024 · Updated Aug 19, 2024

Stack-based buffer overflow in LBT-T300-T390 firmware 2.2.1.8 allows attackers to interrupt service via a crafted POST request. The init_nvram function retrieves an oversized ApCliSsid value from NVRAM after apply.cgi accepts it, overflowing a stack buffer when front-end validation is bypassed. CISA assesses adjacent reachability without prior privileges or user interaction, while the published request carries default Basic credentials.

CVSS severity6.5
Medium
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in LBT-T300-T390 firmware 2.2.1.8 allows attackers to interrupt service via a crafted POST request. The init_nvram function retrieves an oversized ApCliSsid value from NVRAM after apply.cgi accepts it, overflowing a stack buffer when front-end validation is bypassed. CISA assesses adjacent reachability without prior privileges or user interaction, while the published request carries default Basic credentials.

The record

CVE
CVE-2024-27569
Published
Mar 1, 2024
Updated
Aug 19, 2024
Vendor
Shenzhen Libituo Technology Co., Ltd.
Product
LBT-T300-T390 Firmware
Classifications
CWE-121, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 1, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 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 vectoradjacent
Required privilegesunauthenticated

What is affected?

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

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:A/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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1499.004Application 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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