a3300r firmware vulnerabilities and fixes

Recent CVEs affecting a3300r firmware, with upgrade or downgrade steps. 26 tracked.

Also searched as: a3300rfirmware.

a3300r firmware has 26 tracked vulnerabilities, 5 critical. A fixed release or vendor patch exists for 5. Most recent: 2026-04-23. Highest priority: CVE-2026-31181 (score 59/100).

• CVE-2026-5105 MEDIUM 6.3 MITIGATE A vulnerability was detected in Totolink A3300R 17.0.0cu.557_b20221024
• CVE-2026-5104 MEDIUM 6.3 MITIGATE A security vulnerability has been detected in Totolink A3300R 17.0.0cu.557_b20221024
• CVE-2026-5103 MEDIUM 6.3 MITIGATE A weakness has been identified in Totolink A3300R 17.0.0cu.557_b20221024
• CVE-2026-5102 MEDIUM 6.3 MITIGATE A security flaw has been discovered in Totolink A3300R 17.0.0cu.557_b20221024
• CVE-2026-5101 MEDIUM 6.3 MITIGATE A vulnerability was identified in Totolink A3300R 17.0.0cu.557_b20221024
• CVE-2026-31181 CRITICAL 9.8 MITIGATE An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi
• CVE-2026-31179 MEDIUM 6.5 MITIGATE An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi
• CVE-2026-31178 CRITICAL 9.8 MITIGATE An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi
• CVE-2026-31177 CRITICAL 9.8 MITIGATE An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi
• CVE-2026-31176 MEDIUM 6.5 MITIGATE An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi
• CVE-2026-31175 CRITICAL 9.8 MITIGATE An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi
• CVE-2026-31174 MEDIUM 6.5 MITIGATE An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi
• CVE-2026-31173 MEDIUM 6.5 MITIGATE An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi
• CVE-2026-31172 MEDIUM 6.5 MITIGATE An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi
• CVE-2026-31171 MEDIUM 6.5 MITIGATE An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi
• CVE-2026-31170 CRITICAL 9.8 MITIGATE An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi
• CVE-2026-31169 MEDIUM 6.5 MITIGATE An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi
• CVE-2026-31168 MEDIUM 6.5 MITIGATE An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi
• CVE-2026-31167 MEDIUM 6.5 MITIGATE An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi
• CVE-2026-31166 MEDIUM 6.5 MITIGATE An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi
• CVE-2026-31165 MEDIUM 6.5 MITIGATE An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi
• CVE-2026-31164 MEDIUM 6.5 MITIGATE An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi
• CVE-2026-31163 MEDIUM 6.5 MITIGATE An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi
• CVE-2026-31162 MEDIUM 6.5 MITIGATE An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi
• CVE-2026-31160 MEDIUM 6.5 MITIGATE An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi
• CVE-2026-31159 MEDIUM 6.5 MITIGATE An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi

FAQ

How do I fix a3300r firmware vulnerabilities?

Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.

Is a3300r firmware being exploited right now?

None of the tracked a3300r firmware CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.

Which a3300r firmware CVE should I patch first?

CVE-2026-31181 currently ranks highest (59/100): An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi.

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