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NVD Vulnerability Details :
CVE-2025-6599
Analyzed
More InfoOfficial Page
Source-security@zyxel.com.tw
View Known Exploited Vulnerability (KEV) details
Published At-18 Nov, 2025 | 02:15
Updated At-16 Dec, 2025 | 21:19

An uncontrolled resource consumption vulnerability in the web server of Zyxel DX3301-T0 firmware version 5.50(ABVY.6.3)C0 and earlier could allow an attacker to perform Slowloris‑style denial‑of‑service (DoS) attacks. Such attacks may temporarily block legitimate HTTP requests and partially disrupt access to the web management interface, while other networking services remain unaffected.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.15.3MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Primary3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Type: Secondary
Version: 3.1
Base score: 5.3
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Type: Primary
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CPE Matches

Zyxel Networks Corporation
zyxel
>>lte3301-plus_firmware>>Versions up to 1.00\(abqu.7\)c0(inclusive)
cpe:2.3:o:zyxel:lte3301-plus_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>lte3301-plus>>-
cpe:2.3:h:zyxel:lte3301-plus:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>nr5103_firmware>>Versions up to 4.19\(abyc.8\)c0(inclusive)
cpe:2.3:o:zyxel:nr5103_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>nr5103>>-
cpe:2.3:h:zyxel:nr5103:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>nr5103e_firmware>>Versions up to 1.00\(acdj.1\)c0(inclusive)
cpe:2.3:o:zyxel:nr5103e_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>nr5103e>>-
cpe:2.3:h:zyxel:nr5103e:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>nr5309_firmware>>Versions up to 1.00\(ackp.1\)b3(inclusive)
cpe:2.3:o:zyxel:nr5309_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>nr5309>>-
cpe:2.3:h:zyxel:nr5309:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>nr7302_firmware>>Versions up to 5.00\(acha.5\)c0(inclusive)
cpe:2.3:o:zyxel:nr7302_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>nr7302>>-
cpe:2.3:h:zyxel:nr7302:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>nr7303_firmware>>Versions up to 1.00\(acei.1\)c0(inclusive)
cpe:2.3:o:zyxel:nr7303_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>nr7303>>-
cpe:2.3:h:zyxel:nr7303:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>nebula_fwa505_firmware>>Versions up to 1.19\(acko.0\)c0(inclusive)
cpe:2.3:o:zyxel:nebula_fwa505_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>nebula_fwa505>>-
cpe:2.3:h:zyxel:nebula_fwa505:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>nebula_fwa510_firmware>>Versions up to 1.20\(acgd.1\)c0(inclusive)
cpe:2.3:o:zyxel:nebula_fwa510_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>nebula_fwa510>>-
cpe:2.3:h:zyxel:nebula_fwa510:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>nebula_fwa515_firmware>>Versions up to 1.50\(acpz.0\)c0(inclusive)
cpe:2.3:o:zyxel:nebula_fwa515_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>nebula_fwa515>>-
cpe:2.3:h:zyxel:nebula_fwa515:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>nebula_fwa710_firmware>>Versions up to 1.20\(acgc.0\)c0(inclusive)
cpe:2.3:o:zyxel:nebula_fwa710_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>nebula_fwa710>>-
cpe:2.3:h:zyxel:nebula_fwa710:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>dm4200-b0_firmware>>Versions up to 5.17\(acbs.1.3\)c0(inclusive)
cpe:2.3:o:zyxel:dm4200-b0_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>dm4200-b0>>-
cpe:2.3:h:zyxel:dm4200-b0:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>dx3300-t0_firmware>>Versions up to 5.50\(abvy.6.3\)c0(inclusive)
cpe:2.3:o:zyxel:dx3300-t0_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>dx3300-t0>>-
cpe:2.3:h:zyxel:dx3300-t0:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>dx3300-t1_firmware>>Versions up to 5.50\(abvy.6.3\)c0(inclusive)
cpe:2.3:o:zyxel:dx3300-t1_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>dx3300-t1>>-
cpe:2.3:h:zyxel:dx3300-t1:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>dx3301-t0_firmware>>Versions up to 5.50\(abvy.6.3\)c0(inclusive)
cpe:2.3:o:zyxel:dx3301-t0_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>dx3301-t0>>-
cpe:2.3:h:zyxel:dx3301-t0:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>dx4510-b1_firmware>>Versions up to 5.17\(abyl.9\)c0(inclusive)
cpe:2.3:o:zyxel:dx4510-b1_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>dx4510-b1>>-
cpe:2.3:h:zyxel:dx4510-b1:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>dx5401-b0_firmware>>Versions up to 5.17\(abyo.7\)b2(inclusive)
cpe:2.3:o:zyxel:dx5401-b0_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>dx5401-b0>>-
cpe:2.3:h:zyxel:dx5401-b0:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>dx5401-b1_firmware>>Versions up to 5.17\(abyo.7\)b2(inclusive)
cpe:2.3:o:zyxel:dx5401-b1_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>dx5401-b1>>-
cpe:2.3:h:zyxel:dx5401-b1:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>ee3301-00_firmware>>Versions up to 5.63\(acmu.1.1\)c0(inclusive)
cpe:2.3:o:zyxel:ee3301-00_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>ee3301-00>>-
cpe:2.3:h:zyxel:ee3301-00:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>ee5301-00_firmware>>Versions up to 5.63\(acld.1.1\)c0(inclusive)
cpe:2.3:o:zyxel:ee5301-00_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>ee5301-00>>-
cpe:2.3:h:zyxel:ee5301-00:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>ee6510-10_firmware>>Versions up to 5.19\(acjq.3\)c0(inclusive)
cpe:2.3:o:zyxel:ee6510-10_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>ee6510-10>>-
cpe:2.3:h:zyxel:ee6510-10:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>ex3300-t0_firmware>>Versions up to 5.50\(abvy.6.3\)c0(inclusive)
cpe:2.3:o:zyxel:ex3300-t0_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>ex3300-t0>>-
cpe:2.3:h:zyxel:ex3300-t0:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>ex3300-t0_firmware>>Versions up to 5.50\(acdi.2.1\)c0(inclusive)
cpe:2.3:o:zyxel:ex3300-t0_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>ex3300-t0>>-
cpe:2.3:h:zyxel:ex3300-t0:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>ex3300-t1_firmware>>Versions up to 5.50\(abvy.6.3\)c0(inclusive)
cpe:2.3:o:zyxel:ex3300-t1_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>ex3300-t1>>-
cpe:2.3:h:zyxel:ex3300-t1:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>ex3301-t0_firmware>>Versions up to 5.50\(abvy.6.3\)c0(inclusive)
cpe:2.3:o:zyxel:ex3301-t0_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>ex3301-t0>>-
cpe:2.3:h:zyxel:ex3301-t0:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>ex3500-t0_firmware>>Versions up to 5.44\(achr.4\)c0(inclusive)
cpe:2.3:o:zyxel:ex3500-t0_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>ex3500-t0>>-
cpe:2.3:h:zyxel:ex3500-t0:-:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-400Secondarysecurity@zyxel.com.tw
CWE ID: CWE-400
Type: Secondary
Source: security@zyxel.com.tw
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-uncontrolled-resource-consumption-and-command-injection-vulnerabilities-in-certain-4g-lte-5g-nr-cpe-dsl-ethernet-cpe-fiber-onts-security-routers-and-wireless-extenders-11-18-2025security@zyxel.com.tw
Vendor Advisory
Hyperlink: https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-uncontrolled-resource-consumption-and-command-injection-vulnerabilities-in-certain-4g-lte-5g-nr-cpe-dsl-ethernet-cpe-fiber-onts-security-routers-and-wireless-extenders-11-18-2025
Source: security@zyxel.com.tw
Resource:
Vendor Advisory
Change History
0Changes found

Details not found