CVE-2026-76716

Executive Summary

CVE-2026-76716 encompasses multiple vulnerabilities in Aruba Networks' Analytics and Location Engine (ALE) that may permit unauthorized access to sensitive information or induce a denial-of-service condition. The flaw is remotely exploitable without authentication or user interaction (CVSS 3.1 base score 5.3, vector AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L), affecting organizations that expose ALE management or data interfaces. Given EPSS of 0.00512 (41.3rd percentile) and public exploit availability, the immediate risk is elevated for internet-facing ALE deployments, though availability-only impact limits the severity ceiling.

Technical Analysis

The Analytics and Location Engine (ALE) is Aruba's platform for aggregating Wi-Fi location telemetry and delivering analytics to downstream consumers. CVE-2026-76716 is classified under CWE-770 (Allocation of Resources Without Limits or Throttling), which is the canonical weakness family for resource-exhaustion and uncontrolled-consumption defects. The NVD description states that "multiple vulnerabilities exist" and that successful exploitation could result in either a denial-of-service condition or unauthorized access to sensitive information, indicating a compound advisory rather than a single atomic defect.

The attack surface is network-reachable and requires no authentication (PR:N) and no user interaction (UI:N), meaning any host that can establish a TCP session with an exposed ALE service is a candidate attacker. The "specially crafted input" phrasing in the NVD entry, combined with the CWE-770 classification, points to inputs that drive unbounded allocation — e.g., requests that cause the service to allocate memory, spawn worker threads, or hold database connections proportional to attacker-controlled parameters. The "improper security configurations" phrasing indicates that part of the advisory also covers misconfiguration-driven exposure (weak defaults, permissive access controls, or reachable management endpoints).

Because the CVE is a multi-vulnerability advisory and the description does not enumerate discrete endpoints, function names, or parameters, the specific request shapes, URI paths, or JSON/XML field names cannot be stated with confidence. Analysts should treat any ALE ingress endpoint — REST APIs, telemetry ingestion listeners, or administrative interfaces — as in-scope until the vendor publishes a granular advisory. The impact subscore vector (C:N/I:N/A:L) indicates the primary demonstrated effect is low-impact availability degradation; the unauthorized-access component is described qualitatively but is not reflected in the CVSS confidentiality subscore, suggesting the access vector is either conditional or not yet demonstrated at full impact.

Affected version ranges were not supplied in the source intelligence and OSV package data is not applicable (ALE is a vendor appliance/VM product, not an ecosystem-managed package), so version-based scoping must be performed against Aruba's own advisory rather than a package registry.

Exploitation Scenarios

The following chain is described at the vulnerability-class level, since no public PoC details, endpoint names, or parameter names are available. No public PoC code was tracked (Exploit Code: NO), though a public proof-of-concept status is recorded — treat the chain below as inferred from the CWE-770 weakness class and the NVD narrative, not as a reproduced exploit.

1. Reconnaissance / target identification. An unauthenticated attacker enumerates internet-facing hosts via Shodan/Censys using the dorks listed in METADATA. ALE deployments often expose HTTPS management interfaces (port 443) and telemetry ingestion ports; certificate common names and HTTP titles containing "Aruba" or "Analytics and Location Engine" help fingerprint candidates.

2. Triggering the flaw class (resource exhaustion). Consistent with CWE-770, the attacker sends repeated or oversized requests to an exposed ALE service. The objective is to consume a bounded resource — memory, connection pool slots, thread workers, or file descriptors — without the server enforcing a per-client cap or throttling. No specific payload format can be asserted from the available data; the general mechanism is a high-volume or high-cardinality input that the service allocates against without limit.

3. Execution method. Requests are delivered over the network with no credentials and no user interaction. Because the impact subscore is low (A:L), a single request is unlikely to fully take down the service; the realistic pattern is sustained flooding or a small number of crafted requests that each hold a resource for an extended period.

4. Configuration-abuse path (unauthorized access). The advisory also references "improper security configurations." This suggests a subset of ALE deployments is reachable in a state where sensitive analytic or location data can be read without adequate access control. Attackers who identify such a deployment read data directly rather than exploiting a memory-safety flaw.

5. Post-exploitation impact. The availability outcome is service degradation or outage for ALE-dependent analytics consumers. The confidentiality outcome is disclosure of location/analytics data, which is sensitive in retail, healthcare, and campus contexts because it reveals device presence and movement patterns.

Impact Assessment

CVSS 3.1 base score is 5.3 (Medium): AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L. The vector confirms remote, low-complexity, unauthenticated exploitation with no scope change. Only the availability subscore is non-zero, so the scored impact is limited to partial service degradation. The NVD narrative additionally describes unauthorized access to sensitive information, which operational teams should weigh above the numeric score when ALE data includes personally identifiable location telemetry.

Blast radius is defined by deployment topology. ALE instances that aggregate telemetry from large wireless estates are high-value aggregation points: a single outage disrupts analytics dashboards, location-based services, and any downstream systems consuming ALE feeds. Because the vulnerability is unauthenticated, there is no requirement for an adversary to first obtain valid credentials, reducing the effort required for opportunistic scanning activity.

EPSS of 0.00512 places this at the 41.3rd percentile of scored CVEs — a moderate-priority signal, not an emergency. CISA KEV does not list this CVE, and no in-the-wild exploitation has been confirmed. Public proof-of-concept status is recorded, which historically correlates with an uptick in opportunistic scanning after disclosure.

Detection Guidance

Sigma Rule

title: Aruba ALE Unauthenticated Resource Exhaustion Attempt (CVE-2026-76716)
id: 8b2f4c1e-7d3a-4a9e-9c11-ale7671600001
status: experimental
description: Detects high-volume unauthenticated requests against Aruba Analytics and Location Engine (ALE) services consistent with CWE-770 resource exhaustion.
references:
  - https://nvd.nist.gov/vuln/detail/CVE-2026-76716
author: Threat Intelligence
date: 2026/01/01
logsource:
  category: webserver
detection:
  selection_uri:
    cs-uri-stem|contains:
      - '/ale/'
      - '/api/'
      - '/analytics'
  selection_status:
    sc-status:
      - 500
      - 502
      - 503
      - 504
  timeframe: 5m
  condition: selection_uri and selection_status | count() by src_ip > 100
fields:
  - c-ip
  - cs-uri-stem
  - sc-status
falsepositives:
  - Legitimate bulk analytics polling from authorized collectors
level: medium
tags:
  - attack.t1190
  - cve.2026.76716

YARA Rule

rule CVE_2026_76716_Aruba_ALE_Exploit_Artifact
{
    meta:
        description = "Detects exploit artifacts targeting CVE-2026-76716 in Aruba Analytics and Location Engine (ALE)"
        author = "Threat Intelligence"
        date = "2026-01-01"
        reference = "https://nvd.nist.gov/vuln/detail/CVE-2026-76716"
        cve = "CVE-2026-76716"

    strings:
        $ale1 = "Analytics and Location Engine" ascii nocase
        $ale2 = "ALE" ascii
        $path1 = "/ale/" ascii nocase
        $cve = "CVE-2026-76716" ascii

    condition:
        uint32(0) == 0x504B0304 or
        ($ale1 and $path1) or
        $cve
}

Suricata IDS Rule

alert tcp $EXTERNAL_NET any -> $HOME_NET [443,8443,80] (msg:"CVE-2026-76716 Aruba ALE Unauthenticated Resource Exhaustion Attempt"; flow:to_server,established; content:"/ale/"; http_uri; nocase; threshold: type both, track by_src, count 100, seconds 300; classtype:attempted-dos; reference:cve,2026-76716; reference:url,nvd.nist.gov/vuln/detail/CVE-2026-76716; sid:2026767160; rev:1;)

Elastic Detection

sequence by source.ip with maxspan=5m
  [ network where network.transport == "tcp" and destination.port in (80, 443, 8443) and
    url.path : ("/ale/*" or "*/analytics*") ]
  [ network where network.transport == "tcp" and destination.port in (80, 443, 8443) and
    http.response.status_code >= 500 ]

Splunk SPL Query

index=web OR index=proxy
| search (uri_path="/ale/*" OR uri_path="/*analytics*")
| stats count AS requests, dc(uri_path) AS unique_paths BY src_ip, dest_host
| where requests > 100
| eval severity=if(requests > 500, "high", "medium")
| table src_ip, dest_host, requests, unique_paths, severity
| sort - requests

Wazuh OSSEC Rule

<group name="aruba_ale,cve_2026_76716,">
  <rule id="2026767" level="10">
    <decoded_as>web-accesslog</decoded_as>
    <field name="url">/ale/|/analytics</field>
    <field name="id">^5\d\d$</field>
    <description>CVE-2026-76716: Possible Aruba ALE resource exhaustion attack from $(srcip)</description>
    <mitre>
      <id>T1190</id>
    </mitre>
    <group>attack,denial_of_service,</group>
  </rule>
</group>

Mitigation & Patch Guidance

Patch confidence: 0/4 — UNPATCHED. No patch evidence exists from any tracked source, no vendor fix version has been published, and no workaround has been officially documented.

1. Immediate mitigations.

   • Remove ALE management and telemetry interfaces from direct internet exposure. Place them behind a VPN, zero-trust proxy, or IP allowlist. This neutralizes the unauthenticated remote attack vector (AV:N/PR:N) at the network layer.
   • Apply rate limiting and connection caps at the reverse proxy or load balancer in front of ALE so that per-source resource consumption is bounded — a direct compensating control for CWE-770.
   • Review ALE configuration posture for the "improper security configurations" referenced in the advisory: confirm authentication is enforced on all exposed interfaces and that default or anonymous access is disabled.
   • Restrict outbound access from ALE hosts so that a compromised or degraded instance cannot be used as a pivot.

2. Patch / upgrade steps.

   • No patched version is currently identified. Monitor the Aruba Networks security advisory portal (https://www.arubanetworks.com/support-services/security-bulletins/) and HPESecurity advisories for an official fixed build.
   • Until a fix ships, treat version scoping as unresolvable and assume all deployed ALE instances are affected.
   • When a patch is released, validate the fixed build in a non-production environment before fleet-wide rollout, then re-verify that the exposure controls from step 1 remain in place.

3. Long-term hardening.

   • Adopt an asset inventory process that continuously identifies internet-facing ALE instances; Shodan/Censys monitoring of the dorks in METADATA provides early warning of accidental exposure.
   • Enforce resource quotas and request-size limits as a default engineering control for all telemetry-ingestion services, reducing the recurring risk of CWE-770-class defects.
   • Integrate ALE logs into the SIEM with the detections above so that resource-exhaustion attempts are correlated with availability incidents.
   • Where ALE data contains location telemetry about individuals, apply data-minimization and retention controls to reduce the confidentiality impact if unauthorized access occurs.

References

• NVD — CVE-2026-76716: https://nvd.nist.gov/vuln/detail/CVE-2026-76716
• CWE-770 — Allocation of Resources Without Limits or Throttling: https://cwe.mitre.org/data/definitions/770.html
• Aruba Networks Security Bulletins: https://www.arubanetworks.com/support-services/security-bulletins/
• CISA Known Exploited Vulnerabilities Catalog (CVE not listed as of this report): https://www.cisa.gov/known-exploited-vulnerabilities-catalog
• FIRST EPSS — CVE-2026-76716 scoring data: https://api.first.org/data/v1/epss?cve=CVE-2026-76716

No threat actor campaigns or confirmed exploit-in-the-wild activity have been associated with CVE-2026-76716 as of this report. Public proof-of-concept status is recorded, but no exploit code was tracked from the sources reviewed.