Heap-based buffer overflow in Gaia - CVE-2026-48131
Published: May 28, 2026
Vulnerability identifier: #VU132664
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-48131
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a heap-based out-of-bounds write in VPND IKE fragment reassembly when processing an unexpected IKE fragment value with sequence number zero during the early stage of a connection attempt over UDP port 500. A remote attacker can send a specially crafted IKE packet to cause a denial of service.
Existing IPsec tunnels continue to function, and the affected VPN service is automatically restarted by the WatchDog service.
Affected software
Gaia
How to mitigate CVE-2026-48131
Install security update from vendor's website.
Gaia - addressed in versions R81.20 Take 141, R82 Take 103, R82.10 Take 19