CVE-2023-28461
Array Networks AG and vxAG ArrayOS Missing Authentication for Critical Function Vulnerability
Array Networks AG/vxAG ArrayOS
Array Networks Array AG Series and vxAG (9.4.0.481 and earlier) allow remote code execution. An attacker can browse the filesystem on the SSL VPN gateway using a flags attribute in an HTTP header without authentication. The product could then be exploited through a vulnerable URL. The 2023-03-09 vendor advisory stated "a new Array AG release with the fix will be available soon."
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 25 November 2024. US federal agencies were required to remediate it by 16 December 2024. CISA records this vulnerability as known to be used in ransomware campaigns.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 68.1%, which is higher than 99.3% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Frequently asked questions
Is CVE-2023-28461 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2023-28461.
What does CVE-2023-28461 affect?
CVE-2023-28461 affects Array Networks AG/vxAG ArrayOS. Array Networks Array AG Series and vxAG (9.4.0.481 and earlier) allow remote code execution. An attacker can browse the filesystem on the SSL VPN gateway using a flags attribute in an HTTP header without authentication. The product could then be exploited through a vulnerable URL. The 2023-03-09 vendor advisory stated "a new Array AG release with the fix will be available soon."
How severe is CVE-2023-28461?
CVE-2023-28461 is rated CRITICAL with a CVSS base score of 9.8. EPSS puts the probability of exploitation in the next 30 days at 68.1%, higher than 99.3% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 16 December 2024.
How should organisations respond to CVE-2023-28461?
Apply the vendor patch for Array Networks AG/vxAG ArrayOS as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.