How severe is CVE-2025-25343?

CVE-2025-25343 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-2025-25343 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-25343?

CVE-2025-25343 affects Tenda Ac6 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-25343?

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-2025-25343 have an EU (EUVD) identifier?

Yes. CVE-2025-25343 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-4109.

When was CVE-2025-25343 published?

CVE-2025-25343 was published on 2025-02-12 and last updated on 2026-06-17.

CVE-2025-25343

CVE-2025-25343 is a critical-severity vulnerability in Tenda Ac6 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-120.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-4109
Weakness: CWE-120
Affected product: Tenda Ac6 Firmware
Published: 2025-02-12
Last modified: 2026-06-17

Description

Tenda AC6 V15.03.05.16 firmware has a buffer overflow vulnerability in the formexeCommand function.

Frequently asked questions

What is CVE-2025-25343?: Tenda AC6 V15.03.05.16 firmware has a buffer overflow vulnerability in the formexeCommand function.
How severe is CVE-2025-25343?: CVE-2025-25343 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-2025-25343 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-25343?: CVE-2025-25343 affects Tenda Ac6 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-25343?: 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-2025-25343 have an EU (EUVD) identifier?: Yes. CVE-2025-25343 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-4109.
When was CVE-2025-25343 published?: CVE-2025-25343 was published on 2025-02-12 and last updated on 2026-06-17.

References

https://github.com/wy876/cve/issues/4

Affected products (1)

cpe:2.3:o:tenda:ac6_firmware:15.03.05.16:*:*:*:*:*:*:*

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CVE-2025-52221 — Critical (CVSS 9.8): Tenda AC6 15.03.05.16_multi is vulnerable to Buffer Overflow in the formSetCfm function via the funcname, funcpara1,…
CVE-2025-27129 — Critical (CVSS 9.8): An authentication bypass vulnerability exists in the HTTP authentication functionality of Tenda AC6 V5.0 V02.03.01.110.…
CVE-2025-29031 — Critical (CVSS 9.8): Tenda AC6 v15.03.05.16 was discovered to contain a buffer overflow via the fromAddressNat function.
CVE-2025-29030 — Critical (CVSS 9.8): Tenda AC6 v15.03.05.16 was discovered to contain a buffer overflow via the formWifiWpsOOB function.
CVE-2025-29029 — Critical (CVSS 9.8): Tenda AC6 v15.03.05.16 was discovered to contain a buffer overflow via the formSetSpeedWan function.
CVE-2024-52275 — Critical (CVSS 9.8): Stack-based Buffer Overflow vulnerability in Shenzhen Tenda Technology Co Tenda AC6V2 (fromWizardHandle modules) allows…

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