How severe is CVE-2025-55499?

CVE-2025-55499 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.

Is CVE-2025-55499 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-55499?

CVE-2025-55499 affects Tenda Ac6 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-55499?

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

Does CVE-2025-55499 have an EU (EUVD) identifier?

Yes. CVE-2025-55499 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-28590.

When was CVE-2025-55499 published?

CVE-2025-55499 was published on 2025-08-20 and last updated on 2026-06-17.

CVE-2025-55499

CVE-2025-55499 is a medium-severity vulnerability in Tenda Ac6 Firmware with a CVSS 3.x base score of 6.5. 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: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-28590
Weakness: CWE-120
Affected product: Tenda Ac6 Firmware
Published: 2025-08-20
Last modified: 2026-06-17

Description

Tenda AC6 V15.03.06.23_multi was discovered to contain a buffer overflow via the ntpServer parameter in the fromSetSysTime function.

Frequently asked questions

What is CVE-2025-55499?: Tenda AC6 V15.03.06.23_multi was discovered to contain a buffer overflow via the ntpServer parameter in the fromSetSysTime function.
How severe is CVE-2025-55499?: CVE-2025-55499 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2025-55499 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-55499?: CVE-2025-55499 affects Tenda Ac6 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-55499?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-55499 have an EU (EUVD) identifier?: Yes. CVE-2025-55499 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-28590.
When was CVE-2025-55499 published?: CVE-2025-55499 was published on 2025-08-20 and last updated on 2026-06-17.

References

https://github.com/SolitaryGrass/IoT_vuln/blob/main/tenda/AC6/AC6V2.0RTL_V15.03.06.23/fromSetSysTime/poc.md

Affected products (1)

cpe:2.3:o:tenda:ac6_firmware:15.03.06.23:*:*:*:*:*:*:*

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CVE-2025-29029 — Critical (CVSS 9.8): Tenda AC6 v15.03.05.16 was discovered to contain a buffer overflow via the formSetSpeedWan function.
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