TI-2025-39469 Aliases CVE-2025-63835 GHSA-2mgg-5ppq-j685

A stack-based buffer overflow vulnerability was discovered in Tenda AC18…

HIGH 71CWE-121Published 2025-11-10 · Updated 2025-11-18

Key facts

Attack vector: Network
Privileges required: Low
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 · NVD. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.

Summary

A stack-based buffer overflow vulnerability was discovered in Tenda AC18 v15.03.05.05_multi. The vulnerability exists in the guestSsid parameter of the /goform/WifiGuestSet interface. Remote attackers can exploit this vulnerability by sending oversized data to the guestSsid parameter, leading to denial of service (device crash) or potential remote code execution.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00693 53rd percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

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: Partial

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:tenda:ac18_firmware:15.03.05.05:::::::*	15.03.05.05	Vulnerable	Tenda
cpe:2.3:h:tenda:ac18:-:::::::*	not specified by NVD	Running on	Tenda

cpe:2.3:o:tenda:ac18_firmware:15.03.05.05:*:*:*:*:*:*:* Versions 15.03.05.05 Vulnerable ·Tenda
cpe:2.3:h:tenda:ac18:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Tenda

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2025-63835
2026-10-03 Alias added: GHSA-2mgg-5ppq-j685
2026-10-11 EPSS moved to the 50th–90th percentile

References

Exploit 1

https://github.com/babraink/cve_report/blob/main/cve_report/tenda/tendaAC18/2_wifiguest_guestssid_overflow/README.md

TI-2024-37948 Tenda AC18 V15.03.05.19 was discovered to contain a stack overflow via the startIP… CVSS 3.1CRITICAL 9.8
TI-2024-37947 Tenda AC18 V15.03.05.19 was discovered to contain a stack overflow via the firewallEn… CVSS 3.1CRITICAL 9.8
TI-2024-37946 Tenda AC18 V15.03.05.19 was discovered to contain a stack overflow via the devName… CVSS 3.1CRITICAL 9.8
TI-2024-37945 Tenda AC18 V15.03.05.19 was discovered to contain a stack overflow via the limitSpeedUp… CVSS 3.1CRITICAL 9.8
TI-2024-37942 Tenda AC18 V15.03.05.19 was discovered to contain a stack overflow via the ssid parameter… CVSS 3.1CRITICAL 9.8
TI-2024-22327 Tenda AC18 V15.03.05.05 has a stack overflow vulnerability in the remoteIp parameter from formSetSafeWanWebMan function. CVSS 3.1CRITICAL 9.8

See all 102 →

Sources

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