How severe is CVE-2026-33366?

CVE-2026-33366 has a CVSS 3.x base score of 5.3, rated medium 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 low.

Is CVE-2026-33366 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33366?

CVE-2026-33366 primarily affects Buffalo Wcr-1166dhpl Firmware. In total, 46 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-33366?

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

Does CVE-2026-33366 have an EU (EUVD) identifier?

Yes. CVE-2026-33366 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16551.

When was CVE-2026-33366 published?

CVE-2026-33366 was published on 2026-03-27 and last updated on 2026-06-17.

CVE-2026-33366

CVE-2026-33366 is a medium-severity vulnerability in Buffalo Wcr-1166dhpl Firmware with a CVSS 3.x base score of 5.3. 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-306.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v4: 6.9
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-16551
Weakness: CWE-306
Affected product: Buffalo Wcr-1166dhpl Firmware
Published: 2026-03-27
Last modified: 2026-06-17

Description

Missing authentication for critical function vulnerability in BUFFALO Wi-Fi router products may allow an attacker to forcibly reboot the product without authentication.

Frequently asked questions

What is CVE-2026-33366?: Missing authentication for critical function vulnerability in BUFFALO Wi-Fi router products may allow an attacker to forcibly reboot the product without authentication.
How severe is CVE-2026-33366?: CVE-2026-33366 has a CVSS 3.x base score of 5.3, rated medium 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 low.
Is CVE-2026-33366 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33366?: CVE-2026-33366 primarily affects Buffalo Wcr-1166dhpl Firmware. In total, 46 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-33366?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-33366 have an EU (EUVD) identifier?: Yes. CVE-2026-33366 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16551.
When was CVE-2026-33366 published?: CVE-2026-33366 was published on 2026-03-27 and last updated on 2026-06-17.

References

Affected products (46)

cpe:2.3:o:buffalo:wcr-1166dhpl_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wsr3600be4-kh_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wsr3600be4p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wxr-1750dhp_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wxr-1750dhp2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wxr18000be10p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wxr-1900dhp_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wxr-1900dhp2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wxr-1900dhp3_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wxr-5950ax12_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wxr-6000ax12b_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wxr-6000ax12p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wxr-6000ax12s_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wzr-1166dhp_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wzr-1166dhp2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wzr-1750dhp_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wzr-1750dhp2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wzr-s1750dhp_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wrm-d2133hp_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wrm-d2133hs_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wtr-m2133hp_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wtr-m2133hs_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wem-1266_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wem-1266wp_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:vr-u300w_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:vr-u500x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wapm-1266r_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wapm-1266wdpr_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wapm-1266wdpra_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wapm-1750d_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wapm-2133r_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wapm-2133tr_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wapm-ax4r_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wapm-ax8r_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wapm-axetr_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:waps-1266_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:waps-ax4_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:fs-m1266_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:fs-s1266_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wzr-600dhp_firmware:-:*:*:*:*:*:*:*

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