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Vulnerability record · CVE-2025-63835 · published 10 November 2025

CVE-2025-63835: Tenda ac18 firmware out-of-bounds write vulnerability

Tenda · Ac18 Firmware

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.

8.8 CVSS 3.1 High EPSS 0.65% · top 51.1% CWE-787 · Out-of-bounds writeCWE-121 · Stack-based buffer overflow
8.8CVSS 3.1 base score
0.65%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References, 1 tagged exploit
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2026-31255Tenda ac18 firmware command injection vulnerabilityA command injection vulnerability exists in Tenda AC18 V15.03.05.05_multi. The vulnerability is located in the /goform/SetSambaCfg interface, where i…EPSS 1.5%9.8CVE-2024-57579Tenda ac18 firmware out-of-bounds write vulnerabilityTenda AC18 V15.03.05.19 was discovered to contain a stack overflow via the limitSpeedUp parameter in the formSetClientState function.EPSS 0.68%9.8CVE-2024-57580Tenda ac18 firmware out-of-bounds write vulnerabilityTenda AC18 V15.03.05.19 was discovered to contain a stack overflow via the devName parameter in the formSetDeviceName function.EPSS 0.77%9.8CVE-2024-57581Tenda ac18 firmware out-of-bounds write vulnerabilityTenda AC18 V15.03.05.19 was discovered to contain a stack overflow via the firewallEn parameter in the formSetFirewallCfg function.EPSS 0.75%9.8CVE-2024-57582Tenda ac18 firmware out-of-bounds write vulnerabilityTenda AC18 V15.03.05.19 was discovered to contain a stack overflow via the startIP parameter in the formSetPPTPServer function.EPSS 0.75%9.8CVE-2024-57583Tenda ac18 firmware command injection vulnerabilityTenda AC18 V15.03.05.19 was discovered to contain a command injection vulnerability via the usbName parameter in the formSetSambaConf function.EPSS 1.5%9.8CVE-2024-57575Tenda ac18 firmware out-of-bounds write vulnerabilityTenda AC18 V15.03.05.19 was discovered to contain a stack overflow via the ssid parameter in the form_fast_setting_wifi_set function.EPSS 0.79%9.8CVE-2024-33835Tenda ac18 firmware out-of-bounds write vulnerabilityTenda AC18 V15.03.05.05 has a stack overflow vulnerability in the remoteIp parameter from formSetSafeWanWebMan function.EPSS 0.82%

Source: NIST National Vulnerability Database (record CVE-2025-63835), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.