CVE-2026-33280 | Buffalo Wi-Fi Router backdoor

VDB-353817 · CVE-2026-33280 · GCVE-0-2026-33280 BUFFALO WI-FI ROUTER BACKDOOR HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 7.2 $0-$5k 2.45+ Summaryinfo A vulnerability identified as critical has been detected in Buffalo Wi-Fi Router. This affects an unknown part. Performing a manipulation results in backdoor. This vulnerability is reported as CVE-2026-33280. The attack is possible to be carried out remotely. No exploit exists. Detailsinfo A vulnerability classified as critical has been found in Buffalo Wi-Fi Router (affected version not known). This affects some unknown functionality. The manipulation with an unknown input leads to a backdoor vulnerability. CWE is classifying the issue as CWE-912. The product contains functionality that is not documented, not part of the specification, and not accessible through an interface or command sequence that is obvious to the product's users or administrators. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is: Hidden functionality issue exists in BUFFALO Wi-Fi router products, which may allow an attacker to gain access to the product’s debugging functionality, resulting in the execution of arbitrary OS commands. The advisory is shared at buffalo.jp. This vulnerability is uniquely identified as CVE-2026-33280 since 03/25/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Additional levels of successful authentication are required for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 03/27/2026). MITRE ATT&CK project uses the attack technique T1588.001 for this issue. There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Productinfo Type Router Operating System Vendor Buffalo Name Wi-Fi Router License commercial CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA CVSS-B Score: 🔒 CNA CVSS-BT Score: 🔒 CNA Vector: 🔒 CVSSv3info VulDB Meta Base Score: 7.2 VulDB Meta Temp Score: 7.2 VulDB Base Score: 7.2 VulDB Temp Score: 7.2 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 7.2 CNA Vector (jpcert): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Backdoor CWE: CWE-912 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 03/25/2026 CVE reserved 03/27/2026 +2 days Advisory disclosed 03/27/2026 +0 days VulDB entry created 03/27/2026 +0 days VulDB entry last update Sourcesinfo Advisory: buffalo.jp Status: Confirmed CVE: CVE-2026-33280 (🔒) GCVE (CVE): GCVE-0-2026-33280 GCVE (VulDB): GCVE-100-353817 Entryinfo Created: 03/27/2026 07:30 Changes: 03/27/2026 07:30 (73) Complete: 🔍 Cache ID: 99:5D3:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸