How severe is CVE-2026-27650?

CVE-2026-27650 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-2026-27650 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27650?

CVE-2026-27650 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-2026-27650?

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-2026-27650 have an EU (EUVD) identifier?

Yes. CVE-2026-27650 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16543.

When was CVE-2026-27650 published?

CVE-2026-27650 was published on 2026-03-27 and last updated on 2026-06-17.

CVE-2026-27650

CVE-2026-27650 is a critical-severity vulnerability in Buffalo Wcr-1166dhpl 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-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 8.6
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-16543
Weakness: CWE-78
Affected product: Buffalo Wcr-1166dhpl Firmware
Published: 2026-03-27
Last modified: 2026-06-17

Description

OS Command Injection vulnerability exists in BUFFALO Wi-Fi router products. If this vulnerability is exploited, an arbitrary OS command may be executed on the products.

Frequently asked questions

What is CVE-2026-27650?: OS Command Injection vulnerability exists in BUFFALO Wi-Fi router products. If this vulnerability is exploited, an arbitrary OS command may be executed on the products.
How severe is CVE-2026-27650?: CVE-2026-27650 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-2026-27650 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27650?: CVE-2026-27650 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-2026-27650?: 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-2026-27650 have an EU (EUVD) identifier?: Yes. CVE-2026-27650 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16543.
When was CVE-2026-27650 published?: CVE-2026-27650 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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