CVE-2023-28771Vulnerability
Zyxel Multiple Firewalls OS Command Injection Vulnerability
Exploited in the wildCISA added it to its Known Exploited Vulnerabilities list on .
Reported by 1 independent source · first reported by GreyNoise · last reported
Last reported 16 months ago
CISA KEVAdded 31 May 2023
Fix due 21 Jun 2023
Used by ransomware: not knownCISA KEV catalogue
Fix due 21 Jun 2023
Used by ransomware: not knownCISA KEV catalogue
EPSS99.3%
higher than 99% of CVEsFIRST EPSS, as of 14 Oct 2026
higher than 99% of CVEsFIRST EPSS, as of 14 Oct 2026
What the reports say
1 report, newest first · the exact sentence from each-
GreyNoise Observes Exploit Attempts Targeting Zyxel CVE-2023-28771“GreyNoise Observes Exploit Attempts Targeting Zyxel CVE-2023-28771”
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