CVE-2023-43886Public exploitNetwork attack vector

Service crash via device-name stack overflow

Published Nov 7, 2023 · Updated Sep 5, 2024

Stack buffer overflow in the HTTP server of Tenda RX9 Pro 22.03.02.20 allows remote authenticated users to crash the service. The update_dev_name function in libtd_server.so calculates a destination bound from one untrusted input without including the other input's length, overflowing a stack buffer when Chinese encoding is selected. An authenticated HTTP session and the Chinese language setting are required; a crafted SetOnlineDevName request terminates httpd with a segmentation fault.

CVSS severity7.1
High
EPSS probability0.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack buffer overflow in the HTTP server of Tenda RX9 Pro 22.03.02.20 allows remote authenticated users to crash the service. The update_dev_name function in libtd_server.so calculates a destination bound from one untrusted input without including the other input's length, overflowing a stack buffer when Chinese encoding is selected. An authenticated HTTP session and the Chinese language setting are required; a crafted SetOnlineDevName request terminates httpd with a segmentation fault.

The record

CVE
CVE-2023-43886
Published
Nov 7, 2023
Updated
Sep 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 7, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 5, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/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-787Out-of-bounds Write
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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