PT-2025-29711 · Zyxel · Zyxel Vmg8825-T50K

Thomas Rinsma · Published 2025-07-16 · Updated 2025-07-22 · CVE-2025-7673

Positive Technologies (AI Summary)

CVSS v2.0

10

Critical

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Zyxel VMG8825-T50K firmware versions prior to V5.50(ABOM.5)C0

Description A buffer overflow exists in the URL parser of the zhttpd web server. This issue could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and potentially execute arbitrary code by sending a specially crafted HTTP request.

Recommendations Update Zyxel VMG8825-T50K firmware to version V5.50(ABOM.5)C0 or later.

Fix

DoS

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

BDU:2025-14361

CVE-2025-7673

Affected Products

Zyxel Vmg8825-T50K

References · 9

• https://osv.dev/vulnerability/CVE-2025-7673 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-7673 · Security Note
• https://zyxel.com/service-provider/global/en/zyxel-security-advisory-remote-code-execution-and-denial-service-vulnerabilities-cpe · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-14361 · Security Note
• https://twitter.com/CveFindCom/status/1945546662832640347 · Twitter Post
• https://twitter.com/CVEnew/status/1945389099374010866 · Twitter Post
• https://t.me/cvetracker/27935 · Telegram Post
• https://twitter.com/cracbot/status/1947250251376869777 · Twitter Post
• https://twitter.com/CCBalert/status/1947635518147027210 · Twitter Post