How severe is CVE-2025-28220?

CVE-2025-28220 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-2025-28220 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-28220?

CVE-2025-28220 affects Tenda W6-s Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-28220?

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-2025-28220 have an EU (EUVD) identifier?

Yes. CVE-2025-28220 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-8617.

When was CVE-2025-28220 published?

CVE-2025-28220 was published on 2025-03-28 and last updated on 2026-06-17.

CVE-2025-28220

CVE-2025-28220 is a high-severity vulnerability in Tenda W6-s 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-120.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (36th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-8617
Weakness: CWE-120
Affected product: Tenda W6-s Firmware
Published: 2025-03-28
Last modified: 2026-06-17

Description

Tenda W6_S v1.0.0.4_510 has a Buffer Overflow vulnerability in the setcfm function, which allows remote attackers to cause web server crash via parameter funcpara1 passed to the binary through a POST request.

Frequently asked questions

What is CVE-2025-28220?: Tenda W6_S v1.0.0.4_510 has a Buffer Overflow vulnerability in the setcfm function, which allows remote attackers to cause web server crash via parameter funcpara1 passed to the binary through a POST request.
How severe is CVE-2025-28220?: CVE-2025-28220 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-2025-28220 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-28220?: CVE-2025-28220 affects Tenda W6-s Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-28220?: 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-2025-28220 have an EU (EUVD) identifier?: Yes. CVE-2025-28220 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-8617.
When was CVE-2025-28220 published?: CVE-2025-28220 was published on 2025-03-28 and last updated on 2026-06-17.

References

https://github.com/IdaJea/IOT_vuln_1/blob/master/w6_s_v1.0.0.4/setcfm.pdf

Affected products (1)

cpe:2.3:o:tenda:w6-s_firmware:1.0.0.4\(510\):*:*:*:*:*:*:*

More vulnerabilities in Tenda W6-s Firmware

CVE-2025-15255 — Critical (CVSS 9.8): A vulnerability was determined in Tenda W6-S 1.0.0.4(510). This impacts an unknown function of the file /bin/httpd of…
CVE-2022-45497 — Critical (CVSS 9.8): Tenda W6-S v1.0.0.4(510) was discovered to contain a command injection vulnerability in the tpi_get_ping_output…
CVE-2025-28221 — High (CVSS 7.5): Tenda W6_S v1.0.0.4_510 has a Buffer Overflow vulnerability in the set_local_time function, which allows remote…
CVE-2022-45504 — High (CVSS 7.5): An issue in the component tpi_systool_handle(0) (/goform/SysToolRestoreSet) of Tenda W6-S v1.0.0.4(510) allows…
CVE-2022-45503 — High (CVSS 7.5): Tenda W6-S v1.0.0.4(510) was discovered to contain a stack overflow via the linkEn parameter at /goform/setAutoPing.
CVE-2022-45501 — High (CVSS 7.5): Tenda W6-S v1.0.0.4(510) was discovered to contain a stack overflow via the wl_radio parameter at /goform/wifiSSIDset.

All CVEs affecting Tenda W6-s Firmware →

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