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TI-2026-83171 Aliases CVE-2026-118238GHSA-26w6-cmwv-h7mc

OS command injection in Tenda W18E packet capture feature

Priority LOW 37CWE-78Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-78.

Summary

Tenda W18E versions from V16.01.0.20 contain an OS command injection flaw (CWE-78) in the web management server. The server does not validate the protocol and targetDevice JSON fields of the packet capture diagnose feature, so injected shell metacharacters are passed into a tcpdump command. An authenticated user can run commands with root privileges, and the same is possible without authentication if the device is in a factory-reset state.

Written with Claude Haiku 5.5 from the sources below · 2026-10-31

Description from the CNA

The Tenda W18E web management server is vulnerable to OS command injection via the "diagnose" packet-capture feature due to improper validation of JSON fields. An authenticated user can inject shell metacharacters into the protocol or targetDevice fields, which are later concatenated into a tcpdump command and executed with root privileges. This vulnerability can be exploited without authentication if the device is in a factory-reset state.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01535 74th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TendaW18EV16.01.0.20—No fix listedCNA
  • W18E VendorTenda Affected V16.01.0.20 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for Tenda W18E.

Written with Claude Haiku 5.5 from the sources below · 2026-10-31

Timeline

  1. 2026-10-30 Threatist record created from CVE-2026-118238
  2. 2026-10-30 CVSS score added · CISA ADP
  3. 2026-10-30 Weakness changed · CISA ADP
  4. 2026-10-30 CISA SSVC decision points changed
  5. 2026-10-30 Alias added: GHSA-26w6-cmwv-h7mc

References

Other 1

  • TI-2021-11772 An issue was discovered on Tenda AC11 devices with firmware through 02.03.01.104_CN. KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-08863 The goform/setUsbUnload endpoint of Tenda AC15 AC1900 version 15.03.05.19 allows remote… KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-10434 An issue was discovered on Tenda AC7 devices with firmware through V15.03.06.44_CN(AC7)… KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-78650 Stack-based buffer overflow in Tenda AC19 web management service CVSS 4.0CRITICAL 10.0
  • TI-2026-66119 Tenda HG7/HG9/HG10 Boa Web Server formLoopBack boaGetVar stack-based overflow CVSS 4.0CRITICAL 10.0
  • TI-2026-57025 Tenda AC18 Telnet telnet missing authentication CVSS 4.0CRITICAL 10.0
See all 1963 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences