CVE-2026-76698 Overview
CVE-2026-76698 is a command injection vulnerability in the web-based management interface of HPE Networking EdgeConnect SD-WAN Gateways. An authenticated remote attacker with limited privileges can submit specially crafted input to the management interface. Successful exploitation can execute arbitrary commands with elevated privileges or trigger a denial-of-service condition on the affected appliance. The flaw requires low privileges and no user interaction, and it is exploitable over the network. HPE published a security bulletin addressing the issue.
Critical Impact
Authenticated attackers can execute arbitrary commands with elevated privileges or cause the SD-WAN gateway to enter a denial-of-service state, disrupting branch and WAN connectivity.
Affected Products
- HPE Networking EdgeConnect SD-WAN Gateways (web-based management interface)
- Refer to the HPE Security Bulletin for the full list of affected versions
- Deployments exposing the management interface to reachable network segments
Discovery Timeline
- 2026-09-15 - CVE-2026-76698 published to NVD
- 2026-09-16 - Last updated in NVD database
Technical Details for CVE-2026-76698
Vulnerability Analysis
The vulnerability resides in the web-based management interface of HPE Networking EdgeConnect SD-WAN Gateways. The interface accepts user-supplied input in one or more parameters and passes that input into a system command context without adequate sanitization. An authenticated attacker with limited access privileges can inject additional shell metacharacters or command sequences.
When the crafted input reaches the underlying command handler, the appliance interprets the injected content as part of the executed command. The result is arbitrary command execution with privileges higher than those held by the authenticated session. Under alternative conditions, the malformed input causes the affected process to fail, producing a denial-of-service condition on the gateway.
The EPSS score for this CVE is 4.107% (90.249 percentile as of 2026-09-16), indicating relatively elevated exploitation probability compared to the broader CVE population.
Root Cause
The root cause is improper neutralization of special elements used in an operating system command. The management interface constructs commands using attacker-controlled input without validating characters that terminate or chain commands. This maps to command injection weaknesses in networking appliance management planes.
Attack Vector
The attack vector is network-based via the management interface. The attacker requires valid credentials with limited privileges but no user interaction. Once authenticated, the attacker submits a crafted request to a vulnerable endpoint. The interface then executes the injected payload with elevated privileges on the appliance.
No public proof-of-concept exploit is available, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. Refer to the HPE Security Bulletin for technical details.
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Stop Exploit AttemptsDetection Methods for CVE-2026-76698
Indicators of Compromise
- Unexpected shell processes spawned by the web management service on EdgeConnect gateways.
- Management interface requests containing shell metacharacters such as ;, |, &, backticks, or $(...) in parameter values.
- Unexplained gateway service crashes, restarts, or degraded WAN performance following management-plane requests.
- Authenticated sessions from limited-privilege accounts issuing atypical configuration or diagnostic requests.
Detection Strategies
- Inspect HTTP/HTTPS traffic to the appliance management interface for parameter values containing command separators or subshell syntax.
- Correlate authentication events from low-privilege accounts with subsequent privileged command execution on the appliance.
- Alert on repeated management API errors or 5xx responses that coincide with input containing suspicious characters.
Monitoring Recommendations
- Forward EdgeConnect audit logs, web access logs, and system logs to a centralized SIEM for correlation.
- Baseline normal management interface usage per account and alert on deviations in endpoint access patterns.
- Monitor for gateway availability changes and process restarts that may indicate denial-of-service exploitation attempts.
How to Mitigate CVE-2026-76698
Immediate Actions Required
- Apply the fixed firmware version referenced in the HPE Security Bulletin as soon as maintenance windows allow.
- Restrict access to the EdgeConnect web management interface to trusted administrative networks only.
- Rotate credentials for all accounts with access to the management interface, especially limited-privilege accounts.
- Review recent audit logs for evidence of unexpected command execution or interface access.
Patch Information
HPE has released fixed firmware for EdgeConnect SD-WAN Gateways. Consult the HPE Security Bulletin for affected versions, patched releases, and upgrade guidance specific to your deployment.
Workarounds
- Block external access to the management interface using firewall access control lists.
- Require VPN or bastion-host access to reach the gateway management plane.
- Enforce least privilege for administrative accounts and remove unused low-privilege accounts.
- Enable multi-factor authentication for all management interface logins where supported.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
