How severe is CVE-2026-27511?

CVE-2026-27511 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-27511 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27511?

CVE-2026-27511 affects Tenda F3 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-27511?

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

Does CVE-2026-27511 have an EU (EUVD) identifier?

Yes. CVE-2026-27511 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7564.

When was CVE-2026-27511 published?

CVE-2026-27511 was published on 2026-02-23 and last updated on 2026-06-17.

CVE-2026-27511

CVE-2026-27511 is a medium-severity vulnerability in Tenda F3 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-1021.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v4: 5.1
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-7564
Weakness: CWE-1021
Affected product: Tenda F3 Firmware
Published: 2026-02-23
Last modified: 2026-06-17

Description

Shenzhen Tenda F3 Wireless Router firmware V12.01.01.55_multi contains a clickjacking vulnerability in the web-based administrative interface. The interface does not set the X-Frame-Options header, allowing attacker-controlled sites to embed administrative pages in an iframe and trick an authenticated administrator into unintended interactions that may result in unauthorized configuration changes.

Frequently asked questions

What is CVE-2026-27511?: Shenzhen Tenda F3 Wireless Router firmware V12.01.01.55_multi contains a clickjacking vulnerability in the web-based administrative interface. The interface does not set the X-Frame-Options header, allowing attacker-controlled sites to embed administrative pages in an iframe and trick an authenticated administrator into unintended interactions that may result in unauthorized configuration changes.
How severe is CVE-2026-27511?: CVE-2026-27511 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-27511 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27511?: CVE-2026-27511 affects Tenda F3 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-27511?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-27511 have an EU (EUVD) identifier?: Yes. CVE-2026-27511 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7564.
When was CVE-2026-27511 published?: CVE-2026-27511 was published on 2026-02-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:tenda:f3_firmware:*:*:*:*:*:*:*:*

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