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TI-2025-08187 Aliases CVE-2025-8940GHSA-qjx8-48f6-78fq

Tenda AC20 saveParentControlInfo strcpy buffer overflow

Priority HIGH 73CWE-119Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.

Summary

A vulnerability was identified in Tenda AC20 up to 16.03.08.12. Affected by this vulnerability is the function strcpy of the file /goform/saveParentControlInfo. The manipulation of the argument Time leads to buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00994 62nd percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD and the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
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
TendaAC2016.03.08.0; 16.03.08.1; 16.03.08.2; 16.03.08.3; 16.03.08.4; 16.03.08.5; 16.03.08.6; 16.03.08.7; 16.03.08.8; 16.03.08.9; 16.03.08.10; 16.03.08.11; 16.03.08.12—No fix listedCNA
  • AC20 VendorTenda Affected 16.03.08.0; 16.03.08.1; 16.03.08.2; 16.03.08.3; 16.03.08.4; 16.03.08.5; 16.03.08.6; 16.03.08.7; 16.03.08.8; 16.03.08.9; 16.03.08.10; 16.03.08.11; 16.03.08.12 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:tenda:ac20_firmware:*:*:*:*:*:*:*:*16.03.08.0 – 16.03.08.12VulnerableTenda
cpe:2.3:h:tenda:ac20:-:*:*:*:*:*:*:*not specified by NVDRunning onTenda
  • cpe:2.3:o:tenda:ac20_firmware:*:*:*:*:*:*:*:* Versions 16.03.08.0 – 16.03.08.12 Vulnerable ·Tenda
  • cpe:2.3:h:tenda:ac20:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Tenda

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-8940
  2. 2026-10-03 Alias added: GHSA-qjx8-48f6-78fq

References

Exploit 2

Other 1

  • TI-2025-13393 Tenda AC20 openSchedWifi httpd buffer overflow CVSS 4.0HIGH 8.7
  • TI-2025-13392 Tenda AC20 httpd SetSysAutoRebbotCfg formSetRebootTimer stack-based overflow CVSS 4.0HIGH 8.7
  • TI-2025-13391 Tenda AC20 httpd setPptpUserList formSetPPTPUserList stack-based overflow CVSS 4.0HIGH 8.7
  • TI-2025-14008 Tenda AC20 PowerSaveSet sscanf buffer overflow CVSS 4.0HIGH 8.7
  • TI-2025-12122 Tenda AC20 WifiExtraSet buffer overflow CVSS 4.0HIGH 8.7
  • TI-2025-09906 Tenda AC20 HTTP POST Request SetPptpServerCfg strcpy buffer overflow CVSS 4.0HIGH 8.7
See all 19 →

Sources

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