Zyxel EMG2926 Routers Command Injection Vulnerability
A command injection vulnerability was discovered on the Zyxel EMG2926 home router with firmware V1.00(AAQT.4)b8. The vulnerability is located in the diagnostic tools, specifically the nslookup function. A malicious user may exploit…
Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.
Exploitation probability EPSS · FIRST
Exploitation signals 4 / 5
- KEV catalog (CISA)18 Sept 2023
- Exploited in EUVD (ENISA)18 Sept 2023
- Used by ransomwareyes
- EPSS above 10 %33.0%
- No account, over the networkno
What to do
Fix
Apply the vendor’s fix as soon as it is available.
CISA guidance: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Meanwhile
Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.
Manufacturers (CRA)
Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained
Description ENISA EUVD
A command injection vulnerability was discovered on the Zyxel EMG2926 home router with firmware V1.00(AAQT.4)b8. The vulnerability is located in the diagnostic tools, specifically the nslookup function. A malicious user may exploit numerous vectors to execute arbitrary commands on the router, such as the ping_ip parameter to the expert/maintenance/diagnostic/nslookup URI.
Affected products
Open source packages OSV
Affected libraries according to OSV, with fixed versions.
Timeline
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Published
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Exploitation reported (ENISA)
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Added to the KEV catalog
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CISA remediation due date
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EPSS peak: 34.6%
References
Other exploited vulnerabilities from the same vendor
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- CVE-2024-40891Zyxel DSL CPE OS Command Injection Vulnerability6.0 · Background exploitation
- CVE-2024-40890Zyxel DSL CPE OS Command Injection Vulnerability5.9 · Background exploitation
- CVE-2024-11667Zyxel Multiple Firewalls Path Traversal Vulnerability5.5 · Background exploitation
- CVE-2017-18368Zyxel P660HN-T1A Routers Command Injection Vulnerability9.2 · Background exploitation
- CVE-2023-27992Zyxel Multiple NAS Devices Command Injection Vulnerability8.8 · Background exploitation