PT-2025-2603 · Zyxel · Zyxel Vmg4325-B10A

Published 2025-01-27 · Updated 2025-02-19 · CVE-2024-40890

Positive Technologies (AI Summary)

CVSS v2.0

10

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Zyxel VMG4325-B10A firmware version 1.00(AAFR.4)C0 20170615

Description A post-authentication command injection issue in the CGI program could allow an authenticated attacker to execute operating system commands on an affected device by sending a crafted HTTP POST request. The vulnerability exists due to the failure to neutralize special elements used in the operating system command. An attacker could exploit this vulnerability to execute arbitrary commands with "supervisor" or "zyuser" privileges by sending specially crafted network requests via the HTTP protocol.

Recommendations For Zyxel VMG4325-B10A firmware version 1.00(AAFR.4)C0 20170615, consider disabling the CGI program temporarily as a workaround until a patch is available. Restrict access to the CGI program to minimize the risk of exploitation. Avoid using the device until the issue is resolved or an update is applied. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

OS Command Injection

Weakness Enumeration

CWE-78

Related Identifiers

BDU:2025-01350

CVE-2024-40890

Affected Products

Zyxel Vmg4325-B10A

References · 29

• https://nvd.nist.gov/vuln/detail/CVE-2024-40890 · Security Note
• https://zyxel.com/service-provider/global/en/security-advisories/zyxel-security-advisory-command-injection-insecure-in-certain-legacy-dsl-cpe-02-04-2025 · Security Note
• https://bdu.fstec.ru/vul/2025-01350 · Security Note
• https://t.me/cvenotify/109837 · Telegram Post
• https://t.me/cvedetector/17181 · Telegram Post
• https://zyxel.com/fi/fi/products/dsl-cpe · Note
• https://darkreading.com/endpoint-security/unpatched-zyxel-cpe-zero-day-cyberattacker · Note
• https://reddit.com/r/VulnerabilityResearch/comments/1it2fhq/cisa_alert_february_1014 · Reddit Post
• https://cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-40890 · Note
• https://zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-command-injection-and-insecure-default-credentials-vulnerabilities-in-certain-legacy-dsl-cpe-02-04-2025 · Vendor Advisory, Security Note
• https://twitter.com/CveFindCom/status/1886716782376853970 · Twitter Post
• https://bleepingcomputer.com/news/security/hackers-exploit-critical-unpatched-flaw-in-zyxel-cpe-devices · Note
• https://twitter.com/CVEnew/status/1886720136834363556 · Twitter Post
• https://t.me/secharvester/18176 · Telegram Post
• https://securityaffairs.com/173589/hacking/zyxel-cpe-series-devices-cve-2024-40891-exploited.html · Note