CVE-2026-76677

Executive Summary

CVE-2026-76677 is a privilege escalation vulnerability in the API of Aruba EdgeConnect SD-WAN Gateways (EdgeConnect SD-WAN Orchestrator). An authenticated remote user with low privileges can abuse the web-management API to obtain administrative privileges on the web-management interface, resulting in complete system compromise. No public exploit, Nuclei template, or PoC code is currently available, and no patch has been published by any tracked source.

Technical Analysis

The vulnerability is classified under CWE-269 (Improper Privilege Management) and is present in the API exposed by EdgeConnect SD-WAN Gateways. The NVD description states that a remote low-privileged authenticated user can escalate to administrative privilege on the web-management interface. This indicates an authorization/access-control weakness in the web-management API layer rather than a memory-safety defect or injection flaw.

Because the vulnerable component is an API reachable through the web-management interface, the attack surface is network-exposed (CVSS AV:N) and requires only low privileges (PR:L) with no user interaction (UI:N). The attacker must possess valid credentials for a low-privileged account, which lowers the barrier for insider threats, compromised service accounts, or any party able to obtain a limited account. The CVSS vector shows Scope Unchanged (S:U) but High Confidentiality, Integrity, and Availability impact (C:H/I:H/A:H), consistent with a privilege escalation that yields full administrative control of the appliance without crossing a security authority boundary.

No specific function names, API endpoints, parameters, or code paths are provided in the available intelligence, so the exact implementation flaw (for example, missing server-side role validation, broken object/function-level authorization, or improper enforcement of privilege checks on privileged API actions) cannot be confirmed from the data provided. The vulnerability class is improper privilege management in an authenticated API context.

Exploitation Scenarios

No public PoC is available. The following attack chain is inferred strictly from the vulnerability class described in NVD.

1. Reconnaissance/Target identification: An adversary identifies an internet- or management-network-reachable EdgeConnect SD-WAN Gateway web-management interface. This is consistent with Shodan-style discovery of EdgeConnect management portals and is supported by the AV:N vector.

2. Triggering the flaw class: The attacker authenticates to the web-management interface with low-privileged credentials. Once authenticated, the attacker sends API requests intended for higher-privileged operations. Because the vulnerability is improper privilege management, the API does not adequately enforce the caller's role/privilege level, allowing the low-privileged user to invoke administrative functionality.

3. Payload/execution method: At the vulnerability-class level, the "payload" is a crafted, authenticated API request that performs an administrative action the low-privileged account should not be authorized to perform. No specific endpoint, HTTP method, or parameter can be named because none is provided in the source data, and none should be assumed.

4. Post-exploitation impact: Successful exploitation grants administrative privilege on the web-management interface. This yields complete system compromise of the gateway, with High Confidentiality, Integrity, and Availability impact, including potential access to SD-WAN configuration, network policy manipulation, and broader network foothold.

Note: The absence of public exploit code, PoC, or Nuclei template means there is currently no observed exploitation in the wild attributable to this CVE.

Impact Assessment

Business impact is high. A compromised EdgeConnect SD-WAN Gateway can expose network topology, credentials, routing and policy configuration, and can be used as a pivot point into managed networks. Administrative control of the web-management interface effectively grants control over the appliance and its security functions. The CVSS base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) reflects a remotely exploitable, low-complexity, low-privilege-required escalation with high impact across all three CIA properties. CISA KEV status is NO (not known to be exploited). EPSS is 0.00541 (43.3rd percentile), indicating low but non-zero predicted exploitation likelihood. Blast radius includes the gateway itself and any downstream network segments governed by SD-WAN policy.

Detection Guidance

Sigma Rule

title: Aruba EdgeConnect SD-WAN Privilege Escalation via Web-Management API
id: 8f3c2a91-7667-7e00-9c11-000000000001
status: experimental
description: Detects authenticated low-privileged users invoking administrative API actions on EdgeConnect SD-WAN Gateways (CVE-2026-76677).
references:
  - https://nvd.nist.gov/vuln/detail/CVE-2026-76677
author: valtersit.com
logsource:
  category: web
  product: aruba_edgeconnect
detection:
  selection_auth:
    cs-uri-stem|contains: '/api/'
    sc-status: 200
  selection_privilege:
    cs-username|exists: true
    cs-method:
      - 'POST'
      - 'PUT'
      - 'PATCH'
      - 'DELETE'
  condition: selection_auth and selection_privilege
falsepositives:
  - Legitimate administrative activity by authorized administrators
level: high

YARA Rule

rule CVE_2026_76677_EdgeConnect_PrivEsc
{
    meta:
        description = "Detects references to EdgeConnect web-management API privilege escalation targeting CVE-2026-76677"
        author = "valtersit.com"
        reference = "https://nvd.nist.gov/vuln/detail/CVE-2026-76677"
        date = "2026-01-01"
    strings:
        $cve = "CVE-2026-76677" ascii nocase
        $ec = "EdgeConnect" ascii nocase
        $api = "/api/" ascii
        $admin = "web-management" ascii nocase
    condition:
        ($cve and $ec) or ($ec and $api and $admin)
}

Suricata IDS Rule

alert http any any -> any any (msg:"CVE-2026-76677 Aruba EdgeConnect SD-WAN API Privilege Escalation Attempt"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/api/"; nocase; http.header; content:"Authorization"; nocase; reference:cve,CVE-2026-76677; classtype:attempted-admin; sid:2026766; rev:1;)

Elastic Detection

sequence by user.name with maxspan=5m
  [ network where event.action == "user_login" and url.path contains "/api/" ]
  [ network where event.action in ("admin_action", "config_change") and
    user.roles : "low_privilege" and url.path contains "/api/" ]

Splunk SPL Query

index=web OR index=proxy
(uri_path="/api/*" OR cs_uri_stem="/api/*")
(method=POST OR method=PUT OR method=PATCH OR method=DELETE)
status=200
| stats count min(_time) as firstTime max(_time) as lastTime by src_ip, user, uri_path, method, status
| where count > 0

Wazuh OSSEC Rule

<group name="aruba,edgeconnect,web,">
  <rule id="100766" level="12">
    <if_sid>31100</if_sid>
    <match>/api/</match>
    <regex>POST|PUT|PATCH|DELETE</regex>
    <description>CVE-2026-76677: Possible EdgeConnect SD-WAN API privilege escalation attempt</description>
    <mitre>
      <id>T1068</id>
    </mitre>
    <group>web,accesslog,privilege_escalation,</group>
  </rule>
</group>

Mitigation & Patch Guidance

Patch confidence: 0/4 — UNPATCHED. No patch evidence from any tracked source; vendor fix and workarounds are listed as N/A.

1. Immediate mitigations:

• Restrict access to the web-management interface using network segmentation and firewall rules; do not expose EdgeConnect management interfaces to untrusted networks.
• Enforce multi-factor authentication and least-privilege account provisioning; audit and minimize low-privileged accounts.
• Monitor authenticated API access for anomalous privileged calls and alert on escalation patterns.
• Apply vendor-provided configuration protections or role restrictions if and when Aruba publishes guidance.

2. Patch/upgrade steps:

• Monitor Aruba/HPE security advisories for the EdgeConnect SD-WAN Gateway/Orchestrator patched firmware or software release addressing CVE-2026-76677.
• Once a fixed version is available, schedule upgrades during maintenance windows and validate the applied version.

3. Long-term hardening:

• Implement strict server-side authorization checks and regular access-control testing for the web-management API.
• Adopt centralized logging and egress monitoring for management interfaces.
• Conduct periodic privilege reviews and network architecture reviews to eliminate direct internet exposure of management planes.

References

• NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-76677
• Aruba/HPE Product Security Advisories (vendor advisory portal; check for EdgeConnect SD-WAN entry)
• CWE-269: Improper Privilege Management — https://cwe.mitre.org/data/definitions/269.html
• CISA Known Exploited Vulnerabilities Catalog — https://www.cisa.gov/known-exploited-vulnerabilities-catalog (CVE-2026-76677 not listed as of report date)
• FIRST EPSS — https://www.first.org/epss (score 0.00541, ~43.3rd percentile)

No known threat actor campaigns or exploit-in-the-wild evidence are available for CVE-2026-76677 at this time.