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TI-2025-07004 Aliases CVE-2025-7673GHSA-r3pp-h225-m34v

Buffer overflow in Zyxel VMG8825-T50K firmware

Priority MEDIUM 50CWE-120Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.

Summary

A buffer overflow vulnerability in the URL parser of the zhttpd web server in Zyxel VMG8825-T50K firmware versions prior to V5.50(ABOM.5)C0 could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and potentially execute arbitrary code by sending a specially crafted HTTP request.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00652 51st percentileScored 2026-11-07
Fix Fixed VMG8825-T50K firmware (Zyxel): V5.50(ABOM.5)C0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ZyxelVMG8825-T50K firmwarebefore V5.50(ABOM.5)C0V5.50(ABOM.5)C0Patch availableCNA
  • VMG8825-T50K firmware VendorZyxel Affected before V5.50(ABOM.5)C0 Fixed in V5.50(ABOM.5)C0 Patch available CNA

CPE configurations NVD · 50

CPEVersionsRoleVendor
cpe:2.3:o:zyxel:emg3525-t50b_firmware:*:*:*:*:emea:*:*:*before 5.50\(abpm.4\)c0VulnerableZyxel
cpe:2.3:h:zyxel:emg3525-t50b:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
cpe:2.3:o:zyxel:emg3525-t50b_firmware:*:*:*:*:america:*:*:*before 5.50\(absl.0\)b8VulnerableZyxel
cpe:2.3:o:zyxel:emg5523-t50b_firmware:*:*:*:*:emea:*:*:*before 5.50\(abpm.4\)c0VulnerableZyxel
cpe:2.3:h:zyxel:emg5523-t50b:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
cpe:2.3:o:zyxel:emg5523-t50b_firmware:*:*:*:*:america:*:*:*before 5.50\(absl.0\)b8VulnerableZyxel
cpe:2.3:o:zyxel:emg5723-t50k_firmware:*:*:*:*:*:*:*:*before 5.50\(abom.5\)c0VulnerableZyxel
cpe:2.3:h:zyxel:emg5723-t50k:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
cpe:2.3:o:zyxel:emg6726-b10a_firmware:*:*:*:*:*:*:*:*before 5.13\(abnp.6\).cVulnerableZyxel
cpe:2.3:h:zyxel:emg6726-b10a:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
  • cpe:2.3:o:zyxel:emg3525-t50b_firmware:*:*:*:*:emea:*:*:* Versions before 5.50\(abpm.4\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:emg3525-t50b:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
  • cpe:2.3:o:zyxel:emg3525-t50b_firmware:*:*:*:*:america:*:*:* Versions before 5.50\(absl.0\)b8 Vulnerable ·Zyxel
  • cpe:2.3:o:zyxel:emg5523-t50b_firmware:*:*:*:*:emea:*:*:* Versions before 5.50\(abpm.4\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:emg5523-t50b:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
  • cpe:2.3:o:zyxel:emg5523-t50b_firmware:*:*:*:*:america:*:*:* Versions before 5.50\(absl.0\)b8 Vulnerable ·Zyxel
  • cpe:2.3:o:zyxel:emg5723-t50k_firmware:*:*:*:*:*:*:*:* Versions before 5.50\(abom.5\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:emg5723-t50k:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
  • cpe:2.3:o:zyxel:emg6726-b10a_firmware:*:*:*:*:*:*:*:* Versions before 5.13\(abnp.6\).c Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:emg6726-b10a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
Show 40 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:zyxel:ex3510-b0_firmware:*:*:*:*:*:*:*:*before 5.17\(abup.3\)c0VulnerableZyxel
cpe:2.3:h:zyxel:ex3510-b0:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
cpe:2.3:o:zyxel:ex5510-b0_firmware:*:*:*:*:*:*:*:*before 5.15\(abqx.3\)c0VulnerableZyxel
cpe:2.3:h:zyxel:ex5510-b0:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
cpe:2.3:o:zyxel:vmg1312-t20b_firmware:*:*:*:*:*:*:*:*before 5.50\(absb.3\)c0VulnerableZyxel
cpe:2.3:h:zyxel:vmg1312-t20b:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
cpe:2.3:o:zyxel:vmg3625-t50b_firmware:*:*:*:*:*:*:*:*before 5.50\(abpm.4\)c0VulnerableZyxel
cpe:2.3:h:zyxel:vmg3625-t50b:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
cpe:2.3:o:zyxel:vmg3925-b10b_firmware:*:*:*:*:*:*:*:*before 5.13\(aavf.16\)cVulnerableZyxel
cpe:2.3:h:zyxel:vmg3925-b10b:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
cpe:2.3:o:zyxel:vmg3925-b10c_firmware:*:*:*:*:*:*:*:*before 5.13\(aavf.16\)cVulnerableZyxel
cpe:2.3:h:zyxel:vmg3925-b10c:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
cpe:2.3:o:zyxel:vmg3927-b50a_firmware:*:*:*:*:*:*:*:*before 5.15\(abmt.5\)c0VulnerableZyxel
cpe:2.3:h:zyxel:vmg3927-b50a:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
cpe:2.3:o:zyxel:vmg3927-b60a_firmware:*:*:*:*:*:*:*:*before 5.15\(abmt.5\)c0VulnerableZyxel
cpe:2.3:h:zyxel:vmg3927-b60a:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
cpe:2.3:o:zyxel:vmg3927-b50b_firmware:*:*:*:*:*:*:*:*before 5.13\(ably.6\)c0VulnerableZyxel
cpe:2.3:h:zyxel:vmg3927-b50b:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
cpe:2.3:o:zyxel:vmg3927-t50k_firmware:*:*:*:*:*:*:*:*before 5.50\(abom.5\)c0VulnerableZyxel
cpe:2.3:h:zyxel:vmg3927-t50k:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
cpe:2.3:o:zyxel:vmg4005-b50b_firmware:*:*:*:*:*:*:*:*before 5.13\(abrl.5\)c0VulnerableZyxel
cpe:2.3:h:zyxel:vmg4005-b50b:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
cpe:2.3:o:zyxel:vmg4927-b50a_firmware:*:*:*:*:*:*:*:*before 5.13\(ably.6\)c0VulnerableZyxel
cpe:2.3:h:zyxel:vmg4927-b50a:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
cpe:2.3:o:zyxel:vmg8623-t50b_firmware:*:*:*:*:*:*:*:*before 5.50\(abpm.4\)c0VulnerableZyxel
cpe:2.3:h:zyxel:vmg8623-t50b:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
cpe:2.3:o:zyxel:vmg8825-b50a_firmware:*:*:*:*:*:*:*:*before 5.15\(abmt.5\)c0VulnerableZyxel
cpe:2.3:h:zyxel:vmg8825-b50a:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
cpe:2.3:o:zyxel:vmg8825-b60a_firmware:*:*:*:*:*:*:*:*before 5.15\(abmt.5\)c0VulnerableZyxel
cpe:2.3:h:zyxel:vmg8825-b60a:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
cpe:2.3:o:zyxel:vmg8825-bx0b_firmware:*:*:*:*:*:*:*:*before 5.17\(abny.5\)c0VulnerableZyxel
cpe:2.3:h:zyxel:vmg8825-bx0b:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
cpe:2.3:o:zyxel:vmg8825-t50k_firmware:*:*:*:*:*:*:*:*before 5.50\(abom.5\)c0VulnerableZyxel
cpe:2.3:h:zyxel:vmg8825-t50k:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
cpe:2.3:o:zyxel:vmg8924-b10d_firmware:*:*:*:*:*:*:*:*before 5.13\(abgq.6\)c0VulnerableZyxel
cpe:2.3:h:zyxel:vmg8924-b10d:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
cpe:2.3:o:zyxel:xmg3927-b50a_firmware:*:*:*:*:*:*:*:*before 5.15\(abmt.5\)c0VulnerableZyxel
cpe:2.3:h:zyxel:xmg3927-b50a:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
cpe:2.3:o:zyxel:xmg8825-b50a_firmware:*:*:*:*:*:*:*:*before 5.17\(abmt.5\)c0VulnerableZyxel
cpe:2.3:h:zyxel:xmg8825-b50a:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
  • cpe:2.3:o:zyxel:ex3510-b0_firmware:*:*:*:*:*:*:*:* Versions before 5.17\(abup.3\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:ex3510-b0:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
  • cpe:2.3:o:zyxel:ex5510-b0_firmware:*:*:*:*:*:*:*:* Versions before 5.15\(abqx.3\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:ex5510-b0:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
  • cpe:2.3:o:zyxel:vmg1312-t20b_firmware:*:*:*:*:*:*:*:* Versions before 5.50\(absb.3\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:vmg1312-t20b:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
  • cpe:2.3:o:zyxel:vmg3625-t50b_firmware:*:*:*:*:*:*:*:* Versions before 5.50\(abpm.4\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:vmg3625-t50b:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
  • cpe:2.3:o:zyxel:vmg3925-b10b_firmware:*:*:*:*:*:*:*:* Versions before 5.13\(aavf.16\)c Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:vmg3925-b10b:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
  • cpe:2.3:o:zyxel:vmg3925-b10c_firmware:*:*:*:*:*:*:*:* Versions before 5.13\(aavf.16\)c Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:vmg3925-b10c:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
  • cpe:2.3:o:zyxel:vmg3927-b50a_firmware:*:*:*:*:*:*:*:* Versions before 5.15\(abmt.5\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:vmg3927-b50a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
  • cpe:2.3:o:zyxel:vmg3927-b60a_firmware:*:*:*:*:*:*:*:* Versions before 5.15\(abmt.5\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:vmg3927-b60a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
  • cpe:2.3:o:zyxel:vmg3927-b50b_firmware:*:*:*:*:*:*:*:* Versions before 5.13\(ably.6\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:vmg3927-b50b:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
  • cpe:2.3:o:zyxel:vmg3927-t50k_firmware:*:*:*:*:*:*:*:* Versions before 5.50\(abom.5\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:vmg3927-t50k:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
  • cpe:2.3:o:zyxel:vmg4005-b50b_firmware:*:*:*:*:*:*:*:* Versions before 5.13\(abrl.5\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:vmg4005-b50b:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
  • cpe:2.3:o:zyxel:vmg4927-b50a_firmware:*:*:*:*:*:*:*:* Versions before 5.13\(ably.6\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:vmg4927-b50a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
  • cpe:2.3:o:zyxel:vmg8623-t50b_firmware:*:*:*:*:*:*:*:* Versions before 5.50\(abpm.4\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:vmg8623-t50b:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
  • cpe:2.3:o:zyxel:vmg8825-b50a_firmware:*:*:*:*:*:*:*:* Versions before 5.15\(abmt.5\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:vmg8825-b50a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
  • cpe:2.3:o:zyxel:vmg8825-b60a_firmware:*:*:*:*:*:*:*:* Versions before 5.15\(abmt.5\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:vmg8825-b60a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
  • cpe:2.3:o:zyxel:vmg8825-bx0b_firmware:*:*:*:*:*:*:*:* Versions before 5.17\(abny.5\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:vmg8825-bx0b:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
  • cpe:2.3:o:zyxel:vmg8825-t50k_firmware:*:*:*:*:*:*:*:* Versions before 5.50\(abom.5\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:vmg8825-t50k:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
  • cpe:2.3:o:zyxel:vmg8924-b10d_firmware:*:*:*:*:*:*:*:* Versions before 5.13\(abgq.6\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:vmg8924-b10d:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
  • cpe:2.3:o:zyxel:xmg3927-b50a_firmware:*:*:*:*:*:*:*:* Versions before 5.15\(abmt.5\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:xmg3927-b50a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
  • cpe:2.3:o:zyxel:xmg8825-b50a_firmware:*:*:*:*:*:*:*:* Versions before 5.17\(abmt.5\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:xmg8825-b50a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel

Remediation

  • Fix · CNA VMG8825-T50K firmware (Zyxel) Fixed in V5.50(ABOM.5)C0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-7673
  2. 2026-10-03 Alias added: GHSA-r3pp-h225-m34v
  3. 2026-10-18 EPSS moved to the 50th–90th percentile

References

Advisory 1

  • TI-2025-12742 OS command injection in Zyxel EX3301-T0 firmware CVSS 3.1HIGH 8.8
  • TI-2025-07956 OS command injection in Zyxel DX3300-T0 firmware CVSS 3.1HIGH 8.8
  • TI-2022-21188 OS command injection in Zyxel NR7101 firmware CVSS 3.1HIGH 8.8
  • TI-2024-05028 Buffer overflow in Zyxel VMG8825-T50K firmware CVSS 3.1HIGH 7.5
  • TI-2025-05994 Uncontrolled resource consumption in Zyxel DX3301-T0 firmware CVSS 3.1HIGH 7.5
  • TI-2024-08115 Buffer overflow in Zyxel VMG8825-T50K firmware CVSS 3.1HIGH 7.5
See all 27 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences