CVE-2026-105778: Tenda AC5 Wifi setWifi stack-based overflow

Is it exploited?

Not on CISA's list. CISA has not added it to the Known Exploited Vulnerabilities catalog as of 28 Oct 2026. If CISA adds it, this page shows it as known exploited.

How likely is exploitation in the next 30 days?

0.5%

EPSS score, percentile 41.1 of all scored records. A probability estimated by FIRST, not a report of exploitation.

CISA's SSVC assessment in the CVE record lists exploitation as poc.

How severe?

9.4 Critical

CVSS v4.0 base score, given by the CNA

What should I do?

CISA has set no required action, because the vulnerability is not in KEV.

The CVE record links no vendor advisory, patch or mitigation.

Which versions are affected?

Affected

• 02.03.01.111_multi

Versions by product

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 29 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-29_0000Z, as of 29 Oct 2026. About the data.

What to do

Advisories and patches

The CVE record links no vendor advisory, patch or mitigation.

Affected products and versions

As listed in the CVE record.

Source: CVE List V5 (CVE Program), cve_2026-10-29_0000Z, as of 29 Oct 2026. About the data.

About this vulnerability

A vulnerability has been found in Tenda AC5 02.03.01.111_multi. Affected by this issue is some unknown functionality of the file /goform/setWifi of the component Wifi Handler. Such manipulation of the argument wifiPwd leads to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.

Summary: CVE record, as of 29 Oct 2026.

• CISA has not added CVE-2026-105778 to its Known Exploited Vulnerabilities (KEV) catalog, as of 28 Oct 2026.
• The CVE record was published on 6 Oct 2026.
• The CVE record carries a CVSS v4.0 base score of 9.4 (Critical), given by its CNA.
• FIRST's EPSS model puts the probability of exploitation in the next 30 days at 0.5% (percentile 41.1), as of 29 Oct 2026. EPSS is a statistical estimate, not a report of exploitation.
• CISA's SSVC assessment in the CVE record: exploitation poc, automatable no, technical impact total.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-29_0000Z, as of 29 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 29 Oct 2026. About the data.

Description

Tenda AC5 Wifi setWifi stack-based overflow

A vulnerability has been found in Tenda AC5 02.03.01.111_multi. Affected by this issue is some unknown functionality of the file /goform/setWifi of the component Wifi Handler. Such manipulation of the argument wifiPwd leads to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.

Source: CVE List V5 (CVE Program), cve_2026-10-29_0000Z, as of 29 Oct 2026. About the data.

Weakness

• CWE-121
• CWE-119

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record.

Timeline

References

• CVE-2026-105778 | CVE Analysis and Report (Third-party advisory)
• Submit #992587 | Tenda AC5 V02.03.01.111_multi Buffer Overflow (Third-party advisory)
• VDB-413811 | Tenda AC5 Wifi setWifi stack-based overflow (Vulnerability database, Technical description)
• github.com (Exploit)
• VDB-413811 | CTI Indicators (IOB, IOC, IOA)
• tenda.com.cn

Known exploited Tenda vulnerabilities

• CVE-2018-14558: Tenda AC7, AC9, and AC10 Routers Command Injection Vulnerability (added 3 Nov 2021)
• CVE-2020-10987: Tenda AC1900 Router AC15 Model Remote Code Execution Vulnerability (added 3 Nov 2021)
• CVE-2021-31755: Tenda AC11 Router Stack Buffer Overflow Vulnerability (added 3 Nov 2021)