How severe is CVE-2025-69766?

CVE-2025-69766 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-69766 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-69766?

CVE-2025-69766 affects Tenda Ax3 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-69766?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-69766 have an EU (EUVD) identifier?

Yes. CVE-2025-69766 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3647.

When was CVE-2025-69766 published?

CVE-2025-69766 was published on 2026-01-21 and last updated on 2026-06-17.

CVE-2025-69766

CVE-2025-69766 is a critical-severity vulnerability in Tenda Ax3 Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-121.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-3647
Weakness: CWE-121
Affected product: Tenda Ax3 Firmware
Published: 2026-01-21
Last modified: 2026-06-17

Description

Tenda AX3 firmware v16.03.12.11 contains a stack-based buffer overflow in the formGetIptv function due to improper handling of the citytag stack buffer, which may result in memory corruption and remote code execution.

Frequently asked questions

What is CVE-2025-69766?: Tenda AX3 firmware v16.03.12.11 contains a stack-based buffer overflow in the formGetIptv function due to improper handling of the citytag stack buffer, which may result in memory corruption and remote code execution.
How severe is CVE-2025-69766?: CVE-2025-69766 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-69766 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-69766?: CVE-2025-69766 affects Tenda Ax3 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-69766?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-69766 have an EU (EUVD) identifier?: Yes. CVE-2025-69766 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3647.
When was CVE-2025-69766 published?: CVE-2025-69766 was published on 2026-01-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:tenda:ax3_firmware:16.03.12.11:*:*:*:*:*:*:*

More vulnerabilities in Tenda Ax3 Firmware

CVE-2025-69764 — Critical (CVSS 9.8): Tenda AX3 firmware v16.03.12.11 contains a stack-based buffer overflow in the formGetIptv function due to improper…
CVE-2025-69763 — Critical (CVSS 9.8): Tenda AX3 firmware v16.03.12.11 contains a stack overflow in formSetIptv via the vlanId parameter, which can cause…
CVE-2025-69762 — Critical (CVSS 9.8): Tenda AX3 firmware v16.03.12.11 contains a stack overflow in formSetIptv via the list parameter, which can cause memory…
CVE-2023-51812 — Critical (CVSS 9.8): Tenda AX3 v16.03.12.11 was discovered to contain a remote code execution (RCE) vulnerability via the list parameter at…
CVE-2023-49409 — Critical (CVSS 9.8): Tenda AX3 V16.03.12.11 was discovered to contain a Command Execution vulnerability via the function /goform/telnet.
CVE-2023-49408 — Critical (CVSS 9.8): Tenda AX3 V16.03.12.11 was discovered to contain a stack overflow via the function set_device_name.

All CVEs affecting Tenda Ax3 Firmware →

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