How severe is CVE-2025-65221?

CVE-2025-65221 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2025-65221 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-65221?

CVE-2025-65221 affects Tenda Ac21 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-65221?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-65221 have an EU (EUVD) identifier?

Yes. CVE-2025-65221 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198261.

When was CVE-2025-65221 published?

CVE-2025-65221 was published on 2025-11-20 and last updated on 2026-06-17.

CVE-2025-65221

CVE-2025-65221 is a medium-severity vulnerability in Tenda Ac21 Firmware with a CVSS 3.x base score of 4.3. 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: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-198261
Weakness: CWE-121
Affected product: Tenda Ac21 Firmware
Published: 2025-11-20
Last modified: 2026-06-17

Description

Tenda AC21 V16.03.08.16 is vulnerable to Buffer Overflow via the list parameter of /goform/setPptpUserList.

Frequently asked questions

What is CVE-2025-65221?: Tenda AC21 V16.03.08.16 is vulnerable to Buffer Overflow via the list parameter of /goform/setPptpUserList.
How severe is CVE-2025-65221?: CVE-2025-65221 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2025-65221 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-65221?: CVE-2025-65221 affects Tenda Ac21 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-65221?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-65221 have an EU (EUVD) identifier?: Yes. CVE-2025-65221 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198261.
When was CVE-2025-65221 published?: CVE-2025-65221 was published on 2025-11-20 and last updated on 2026-06-17.

References

https://github.com/Madgeaaaaa/MY_VULN_2/blob/main/Tenda/VULN2.md

Affected products (1)

cpe:2.3:o:tenda:ac21_firmware:16.03.08.16:*:*:*:*:*:*:*

More vulnerabilities in Tenda Ac21 Firmware

CVE-2025-9605 — Critical (CVSS 9.8): A security vulnerability has been detected in Tenda AC21 and AC23 16.03.08.16. Affected is the function…
CVE-2026-4565 — High (CVSS 8.8): A vulnerability was detected in Tenda AC21 16.03.08.16. Impacted is the function formSetQosBand of the file…
CVE-2026-1637 — High (CVSS 8.8): A vulnerability was identified in Tenda AC21 16.03.08.16. The affected element is the function fromAdvSetMacMtuWan of…
CVE-2025-13446 — High (CVSS 8.8): A vulnerability has been found in Tenda AC21 16.03.08.16. This vulnerability affects unknown code of the file…
CVE-2025-13445 — High (CVSS 8.8): A flaw has been found in Tenda AC21 16.03.08.16. This affects an unknown part of the file /goform/SetIpMacBind.…
CVE-2025-12611 — High (CVSS 8.8): A vulnerability was identified in Tenda AC21 16.03.08.16. This vulnerability affects the function formSetPPTPServer of…

All CVEs affecting Tenda Ac21 Firmware →

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