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CVE-2024-40890: Zyxel DSL CPE OS Command Injection Vulnerability

criticalknown exploitedCVE-2024-40890
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Multiple Zyxel DSL CPE devices contain a post-authentication command injection vulnerability in the CGI program that could allow an authenticated attacker to execute OS commands via a crafted HTTP request.

CSIRTS triage

vendor: Zyxelproduct: DSL CPECode injectionOther
What
Zyxel DSL CPE devices have a post-authentication command injection vulnerability that could allow an authenticated attacker to execute OS commands.
Who is affected
Authenticated users of multiple Zyxel DSL CPE devices.
Urgency
Remediation is urgent as the vulnerability is actively exploited and poses a critical risk.
Action
Update the firmware of the affected Zyxel DSL CPE devices.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2025-02-11
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2024-40890

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2024-40890coverage & exploitation statusNVD · CVE.org

Recent advisories for Zyxel DSL CPE

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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