How severe is CVE-2025-27129?

CVE-2025-27129 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-2025-27129 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-27129?

CVE-2025-27129 affects Tenda Ac6 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-27129?

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-2025-27129 have an EU (EUVD) identifier?

Yes. CVE-2025-27129 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-27733.

When was CVE-2025-27129 published?

CVE-2025-27129 was published on 2025-08-20 and last updated on 2026-06-17.

CVE-2025-27129

CVE-2025-27129 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-288.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-27733
Weakness: CWE-288
Affected product: Tenda Ac6 Firmware
Published: 2025-08-20
Last modified: 2026-06-17

Description

An authentication bypass vulnerability exists in the HTTP authentication functionality of Tenda AC6 V5.0 V02.03.01.110. A specially crafted HTTP request can lead to arbitrary code execution. An attacker can send packets to trigger this vulnerability.

Frequently asked questions

What is CVE-2025-27129?: An authentication bypass vulnerability exists in the HTTP authentication functionality of Tenda AC6 V5.0 V02.03.01.110. A specially crafted HTTP request can lead to arbitrary code execution. An attacker can send packets to trigger this vulnerability.
How severe is CVE-2025-27129?: CVE-2025-27129 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-2025-27129 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-27129?: CVE-2025-27129 affects Tenda Ac6 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-27129?: 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-2025-27129 have an EU (EUVD) identifier?: Yes. CVE-2025-27129 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-27733.
When was CVE-2025-27129 published?: CVE-2025-27129 was published on 2025-08-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:tenda:ac6_firmware:02.03.01.110:*:*:*:*:*:*:*

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