Nr5103E Firmware
Monthly
Slowloris-style denial of service in Zyxel DX3301-T0 firmware 5.50(ABVY.6.3)C0 and earlier, with the vendor advisory covering a broader family of Zyxel 4G/5G NR CPE, DSL/Ethernet CPE, fiber ONT, security router and wireless extender models, lets unauthenticated remote attackers tie up the embedded HTTP web-management service by holding many partial connections open. The result is temporary unavailability or degradation of the web GUI only - data-plane networking services keep running - so impact is availability-limited rather than a full device outage. No public exploit identified at time of analysis, and EPSS is only 0.08% (24th percentile); the 7.5 base score reflects network reachability, while our assessed vector (A:L) captures the temporary, management-plane-only disruption.
The buffer overflow vulnerability in the DX3300-T1 firmware version V5.50(ABVY.4)C0 could allow an authenticated local attacker to cause denial of service (DoS) conditions by executing the CLI. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
Slowloris-style denial of service in Zyxel DX3301-T0 firmware 5.50(ABVY.6.3)C0 and earlier, with the vendor advisory covering a broader family of Zyxel 4G/5G NR CPE, DSL/Ethernet CPE, fiber ONT, security router and wireless extender models, lets unauthenticated remote attackers tie up the embedded HTTP web-management service by holding many partial connections open. The result is temporary unavailability or degradation of the web GUI only - data-plane networking services keep running - so impact is availability-limited rather than a full device outage. No public exploit identified at time of analysis, and EPSS is only 0.08% (24th percentile); the 7.5 base score reflects network reachability, while our assessed vector (A:L) captures the temporary, management-plane-only disruption.
The buffer overflow vulnerability in the DX3300-T1 firmware version V5.50(ABVY.4)C0 could allow an authenticated local attacker to cause denial of service (DoS) conditions by executing the CLI. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.