# CVE-2026-76699: HPE EdgeConnect SD-WAN Gateway buffer overflow in system service

Source: https://junglewise.ai/threats/cve-2026-76699-hpe-edgeconnect-sd-wan-gateway-buffer-overflow-in-system-service  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-15. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-76699 · Severity: medium · CVSS 6.4 · Published 2026-09-15

HPE EdgeConnect SD-WAN Gateways are networking appliances used to manage and secure wide-area network (WAN) traffic for enterprise branches. A buffer overflow vulnerability in the underlying operating system's system service could allow a nearby attacker to crash the gateway, temporarily disrupting network connectivity and business operations without needing to authenticate first.

Technologies: [Hpe EdgeConnect SD-WAN Gateway](https://junglewise.ai/threats/technologies/edgeconnect-sd-wan-gateway). Vendors: [Hpe](https://junglewise.ai/threats/vendors/hpe).

## Quick answers

**Is CVE-2026-76699 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-76699 being exploited in the wild.

**How severe is CVE-2026-76699?** Medium severity, with a CVSS score of 6.4, published 15 September 2026.

**Which products and versions are affected?** HPE EdgeConnect SD-WAN Gateway.

**Is there a fix for CVE-2026-76699?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-76699 attacked?** It is attacked from the adjacent network, in a network appliance.

**Am I affected by CVE-2026-76699?** Check whether you run Hpe EdgeConnect SD-WAN Gateway. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A buffer overflow vulnerability exists in a system service within the underlying operating system of HPE EdgeConnect SD-WAN Gateways. The vulnerability can be triggered by an unauthenticated adjacent attacker (no authentication required, but attacker must be on the same network segment). Successful exploitation allows an attacker to crash the affected service, causing a denial-of-service condition that temporarily disrupts network operations. The attack vector is adjacent network access, and the primary impact is availability degradation.

## Affected products

- HPE EdgeConnect SD-WAN Gateway

## Timeline

- 2026-09-15: disclosed

## References

- [https://support.hpe.com/hpesc/public/docDisplay?docId=hpesbnw05135en_us&docLocale=en_US](https://support.hpe.com/hpesc/public/docDisplay?docId=hpesbnw05135en_us&docLocale=en_US)

## Related threats

- [HPE EdgeConnect SD-WAN Gateway information disclosure via memory access](https://junglewise.ai/threats/cve-2026-76707-hpe-edgeconnect-sd-wan-gateway-information-disclosure-via-memory)
- [HPE EdgeConnect denial of service in operating system](https://junglewise.ai/threats/cve-2026-76702-hpe-edgeconnect-denial-of-service-in-operating-system)
- [HPE Networking EdgeConnect SD-WAN Gateway information disclosure in web management interface](https://junglewise.ai/threats/cve-2026-76697-hpe-networking-edgeconnect-sd-wan-gateway-information-disclosure)
- [HPE EdgeConnect SD-WAN Gateway denial of service](https://junglewise.ai/threats/cve-2026-76696-hpe-edgeconnect-sd-wan-gateway-denial-of-service)
- [HPE EdgeConnect SD-WAN Gateway buffer overflow in underlying OS](https://junglewise.ai/threats/cve-2026-76695-hpe-edgeconnect-sd-wan-gateway-buffer-overflow-in-underlying-os)