How severe is CVE-2025-71027?

CVE-2025-71027 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-71027 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-71027?

CVE-2025-71027 affects Tenda Ax3 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-71027?

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

Does CVE-2025-71027 have an EU (EUVD) identifier?

Yes. CVE-2025-71027 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2268.

When was CVE-2025-71027 published?

CVE-2025-71027 was published on 2026-01-13 and last updated on 2026-06-17.

CVE-2025-71027

CVE-2025-71027 is a high-severity vulnerability in Tenda Ax3 Firmware with a CVSS 3.x base score of 7.5. 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-787.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-2268
Weakness: CWE-787
Affected product: Tenda Ax3 Firmware
Published: 2026-01-13
Last modified: 2026-06-17

Description

Tenda AX-3 v16.03.12.10_CN was discovered to contain a stack overflow in the wanMTU2 parameter of the fromAdvSetMacMtuWan function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request.

Frequently asked questions

What is CVE-2025-71027?: Tenda AX-3 v16.03.12.10_CN was discovered to contain a stack overflow in the wanMTU2 parameter of the fromAdvSetMacMtuWan function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request.
How severe is CVE-2025-71027?: CVE-2025-71027 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-71027 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-71027?: CVE-2025-71027 affects Tenda Ax3 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-71027?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-71027 have an EU (EUVD) identifier?: Yes. CVE-2025-71027 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2268.
When was CVE-2025-71027 published?: CVE-2025-71027 was published on 2026-01-13 and last updated on 2026-06-17.

References

https://github.com/0-fool/VulnbyCola/blob/main/Tenda/AX-3/8/1.md

Affected products (1)

cpe:2.3:o:tenda:ax3_firmware:16.03.12.10_cn:*:*:*:*:*:*:*

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-2025-69766 — 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.

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