CVE-2026-76674

This is a defect that can cause a gateway to mishandle specially crafted network traffic. It is like an intruder finding a way to turn a building's front-door intercom into the master key for the whole building.

This matters to you if your business runs EdgeConnect SD-WAN Gateways, including devices managed by an IT provider. The available information does not confirm whether the vulnerable service is exposed in the default setup, so prioritize gateways reachable from untrusted networks.

This is urgent because a successful network attack can give an attacker complete control of the gateway. There is no confirmed public exploitation or public exploit code in the available findings, but the severity and no-account attack path warrant immediate exposure reduction and vendor follow-up.

Confirm exposure by inventorying all EdgeConnect SD-WAN Gateways, recording their installed software versions, and determining which network interfaces accept traffic from untrusted networks. Check HPE support advisories or open a support case to establish whether each installed version is affected; the available findings provide no fixed version or supported release branch target.

No upgrade path or compatibility guidance is currently available. If patching is delayed, restrict inbound connectivity to trusted source networks and required business peers only, avoid exposing gateway management or unnecessary services to the internet, and have the device managed by the responsible network team.

CISA has not added CVE-2026-76674 to the Known Exploited Vulnerabilities catalog, so no CISA remediation due date is available. Monitor gateway and perimeter-network logs for unexpected inbound sessions, configuration changes, unusual command activity, and unexplained connectivity changes; preserve relevant logs and isolate affected devices if compromise is suspected.

CVE-2026-76674 is rated CVSS 9.8 Critical (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). It is a CWE-120 buffer overflow in the underlying operating system of EdgeConnect SD-WAN Gateways, reachable through network traffic and requiring neither authentication nor user interaction; successful exploitation permits arbitrary command execution and complete system compromise. CISA KEV does not list this CVE, no public exploit code is on record, and no clear dated reporting confirms exploitation in the wild. EPSS estimates a 1.1% likelihood (62nd percentile), with a flat trend; this is predictive rather than evidence of exploitation.