CVE-2026-76708

Executive Summary

CVE-2026-76708 is a critical (CVSS 9.8) default-credential vulnerability in Aruba Networks' Analytics and Location Engine (ALE), where the application and its underlying operating system ship with hard-coded credentials for multiple administrative and system accounts. Any unauthenticated remote attacker who can reach the management interface can attempt logins with publicly known default credentials, and success yields unauthorized access to both the application management plane and the host operating system. Given the network-reachable, no-authentication-required attack profile and the potential for full system compromise, this vulnerability represents an immediate existential risk to any internet- or laterally-exposed ALE deployment.

Technical Analysis

The root cause is classified as CWE-798: Use of Hard-coded Credentials. Per the NVD description, the Analytics and Location Engine (ALE) uses default, hard-coded credentials for "several administrative and system accounts" — meaning the weakness exists at two layers simultaneously:

1. Application layer — ALE's own management interface authenticates users against account credentials that are fixed at build/deployment time and are not uniquely generated per installation.
2. Operating system layer — The underlying OS hosting ALE likewise maintains default, hard-coded credentials for system-level accounts.

This dual-layer weakness is significant. A successful credential guess against the application does not merely grant access to a web console; because the OS accounts share the same defect class, the same or related credential sets may extend privileges to the host operating system itself. The NVD text explicitly notes that exploitation "could result in an attacker gaining unauthorized access to the application's management interface and the underlying operating system, potentially leading to full system compromise."

From an attack-surface perspective, the CVSS vector AV:N/AC:L/PR:N/UI:N indicates:

• AV:N (Network) — the management interface is reachable over the network, not restricted to local console access.
• AC:L (Low) — no special conditions, race windows, or memory layout constraints are required; the attack is a straightforward authentication attempt.
• PR:N (None) — the attacker needs no prior credentials or privileges.
• UI:N (None) — no victim interaction is needed.
• Scope Unchanged (S:U) — impact is confined to the vulnerable component's security authority, though that authority spans both the ALE application and its host OS.

No CVE description text identifies specific function names, endpoints, parameter names, file paths, or credential strings, and no public proof-of-concept, Nuclei template, or exploit code exists in tracked sources as of this writing. Accordingly, this report describes the attack at the vulnerability-class level (default/hard-coded credential authentication bypass) and does not fabricate implementation specifics. The ALE product is associated with Aruba's location-analytics and Wi-Fi presence ecosystem, and deployments in that ecosystem are frequently placed on management networks or exposed for telemetry ingestion — a configuration that materially raises exposure risk for a credential-based flaw of this class.

Exploitation Scenarios

The following attack chain is inferred strictly from the CVE description and the CWE-798 vulnerability class. No public PoC is available; details below remain at the class level.

1) Reconnaissance / target identification. An attacker scans for internet- or intranet-reachable ALE management interfaces. Because the CVSS vector is AV:N, the relevant exposure is any network path to the ALE management plane — including management VLANs reachable via compromised internal hosts and, in misconfigured cases, direct internet exposure. Fingerprinting relies on the product's identifiable management interface, TLS certificate metadata, or banner content; Shodan and similar passive-scan services can be queried for such exposures.

2) Triggering the flaw class. The vulnerability is triggered simply by submitting authentication attempts to the ALE management interface and/or the underlying OS login service using known default, hard-coded credentials. Because the credentials are "default" and "hard-coded," they are identical or near-identical across installations and therefore discoverable from vendor documentation, firmware images, or public credential lists. There is no injection, memory corruption, or crafted payload — the exploitation primitive is credential reuse against a fixed credential set. This corresponds to ATT&CK T1078.001 (Valid Accounts: Default Accounts).

3) Execution / payload method. At the vulnerability-class level, a successful attempt authenticates the attacker as one of the affected administrative or system accounts. No exploit payload is required; access is obtained through legitimate authentication functionality abused with illegitimate (default) secrets. If the affected account holds OS-level privileges, the attacker may then transition from application console access to host shell access using corresponding default OS credentials.

4) Post-exploitation impact. Per the NVD description, successful exploitation yields unauthorized access to both the ALE management interface and the underlying operating system, "potentially leading to full system compromise." In practical terms this means the attacker can read and modify ALE data and configuration, alter location analytics and telemetry handling, pivot to adjacent network segments reachable from the host, establish persistence at the OS layer, and potentially use the compromised appliance as a foothold for lateral movement. The C:H/I:H/A:H subscores reflect complete loss of confidentiality, integrity, and availability of the affected system.

Impact Assessment

With a CVSS 3.1 base score of 9.8 (Critical) and subscores of Confidentiality: High, Integrity: High, Availability: High, the blast radius of a single successful exploitation is the entire affected ALE host and everything it can reach. The EPSS score is 0.00594, placing the CVE at the 46.1st percentile of exploited CVEs — a low near-term exploitation likelihood estimate that reflects the current absence of public exploit code, not the severity of a successful attack. Default-credential flaws are, however, trivial to weaponize once credential values become widely known, and EPSS should be expected to rise if such values circulate.

Business impact:

• Analytics and location data integrity — ALE processes Wi-Fi presence and location analytics; tampering corrupts downstream business intelligence and client-tracking pipelines.
• Management-plane compromise — Control of the ALE management interface enables configuration manipulation and potentially impacts integration with other Aruba infrastructure.
• Host-level compromise (S:U but multi-layer) — OS access converts a single appliance into a persistent network foothold, enabling lateral movement, credential collection, and further compromise.
• Compliance exposure — Unauthorized access to systems processing location data may trigger regulatory notification obligations depending on jurisdiction.

CISA KEV status is NO, and no exploit-in-the-wild evidence is present in the provided data. Absence of KEV listing does not reduce remediation priority for internet- or partner-reachable ALE instances.

Detection Guidance

Detection must target two behaviors: (a) authentication attempts against ALE/OS administrative accounts, and (b) successful logins from anomalous sources. Because the flaw is credential-based rather than exploit-code-based, network content signatures are inherently weak; behavioral and log-based detection is primary.

Sigma Rule

title: Default Credential Authentication Attempts Against Aruba ALE Management Interface
id: 8f3b1a72-4c6e-4d2a-9b0f-2d6e7a1c9f04
status: experimental
description: Detects repeated failed-then-successful authentication attempts against ALE management or host OS accounts, consistent with default/hard-coded credential abuse (CVE-2026-76708, CWE-798).
references:
  - https://nvd.nist.gov/vuln/detail/CVE-2026-76708
author: valtersit.com
date: 2026/01/01
tags:
  - attack.initial_access
  - attack.t1078.001
  - cve.2026.76708
logsource:
  product: linux
  service: auth
detection:
  selection_attempts:
    message|contains:
      - 'authentication failure'
      - 'Failed password'
      - 'Invalid user'
  selection_default_accounts:
    user|contains:
      - 'admin'
      - 'administrator'
      - 'root'
      - 'support'
      - 'ale'
  timeframe: 5m
  condition: selection_attempts and selection_default_accounts | count() by src_ip > 5
falsepositives:
  - Legitimate administrative password resets or mistyped credentials
level: high

YARA Rule

rule CVE_2026_76708_Aruba_ALE_Default_Credentials
{
    meta:
        description = "Detects references to hard-coded/default credentials in ALE-related configuration, firmware, or advisory artifacts (CVE-2026-76708, CWE-798)"
        author = "valtersit.com"
        date = "2026-01-01"
        reference = "https://nvd.nist.gov/vuln/detail/CVE-2026-76708"
        severity = "critical"

    strings:
        $ale1 = "Analytics and Location Engine" ascii wide nocase
        $ale2 = "ale_management" ascii wide nocase
        $cred1 = "default password" ascii wide nocase
        $cred2 = "default credentials" ascii wide nocase
        $cred3 = "hard-coded credentials" ascii wide nocase
        $cred4 = "hardcoded credentials" ascii wide nocase

    condition:
        (uint16(0) == 0x5A4D or uint32(0) == 0x464C457F or true) and
        (any of ($ale*)) and (2 of ($cred*))
}

Suricata IDS Rule

alert http any any -> any any (msg:"CVE-2026-76708 Aruba ALE Excessive Authentication Attempts (Default Credential Abuse)"; flow:to_server,established; http.method; content:"POST"; http.uri; content:"login"; nocase; threshold:type both, track by_src, count 10, seconds 60; classtype:attempted-admin; reference:cve,2026-76708; reference:url,nvd.nist.gov/vuln/detail/CVE-2026-76708; sid:202676708; rev:1;)

alert tcp any any -> any 22 (msg:"CVE-2026-76708 Potential Default Credential SSH Login to ALE Host"; flow:to_server,established; content:"SSH-"; depth:4; threshold:type both, track by_src, count 8, seconds 60; classtype:attempted-admin; reference:cve,2026-76708; sid:202676709; rev:1;)

Note: The URI substring (login) and port 22 target generic authentication surfaces; exact ALE management endpoints are not enumerated in the provided CVE data. Tune URI matching to the observed ALE interface in your environment.

Elastic Detection

sequence by source.ip with maxspan=5m
  [ authentication where event.outcome == "failure" and user.name in ("admin","administrator","root","support","ale") ]
  [ authentication where event.outcome == "success" and user.name in ("admin","administrator","root","support","ale") ]

Splunk SPL Query

index=ale OR index=linux_secure (sourcetype=ale:auth OR sourcetype=linux_secure)
| search ("authentication failure" OR "Failed password" OR "Invalid user" OR "Accepted password")
| rex field=_raw "(?:user=|for user |Invalid user )(?<target_user>[A-Za-z0-9._-]+)"
| where lower(target_user) IN ("admin","administrator","root","support","ale")
| stats count(eval(searchmatch("Failed password") OR searchmatch("authentication failure"))) AS failures,
        count(eval(searchmatch("Accepted password"))) AS successes
        BY src_ip, target_user
| where failures >= 5 AND successes >= 1
| sort - failures

Wazuh OSSEC Rule

<group name="aruba_ale,cve_2026_76708,">
  <rule id="100767" level="5">
    <if_sid>5710</if_sid>
    <match>admin|administrator|root|support|ale</match>
    <description>CVE-2026-76708: Failed authentication attempt against ALE/OS default account</description>
  </rule>

  <rule id="100768" level="12" frequency="5" timeframe="300">
    <if_matched_sid>100767</if_matched_sid>
    <same_source_ip />
    <description>CVE-2026-76708: Repeated failed logins against ALE default accounts from same source - possible default credential attack</description>
    <mitre>
      <id>T1078.001</id>
    </mitre>
  </rule>
</group>

Mitigation & Patch Guidance

Patch confidence: 0/4 (UNPATCHED). No vendor fix, workaround, or affected-version range is available from any tracked source. The following actions reduce exposure until a vendor patch is published.

1) Immediate mitigations

• Change all default administrative and system account credentials on every ALE instance — at both the ALE application layer and the underlying operating system — to unique, high-entropy secrets. Verify no shared/duplicate credentials remain across appliances.
• Remove, disable, or rename unused default accounts (including OS-level service and support accounts) wherever the platform allows.
• Restrict network reachability of the ALE management interface and host OS login services to trusted administrative segments only; block exposure from the internet and from untrusted internal VLANs via firewall/ACL controls.
• Enforce multi-factor authentication on administrative access paths where ALE or a fronting access layer supports it.
• Rate-limit and alert on authentication attempts against management interfaces.

2) Patch / upgrade steps

• Monitor the Aruba Networks (HPE) security advisory portal and the NVD entry for CVE-2026-76708 for an official fixed release. No patched version identifier exists in tracked data as of this report.
• When a vendor release becomes available, validate the upgraded build, re-verify credential uniqueness post-upgrade (patches do not always rotate existing credentials), and confirm the change did not reintroduce default accounts.
• Because the flaw is hard-coded at build time, treat any vendor guidance that only documents credential rotation as a stopgap, not a full remediation.

3) Long-term hardening

• Adopt a secrets-management process that forbids static, shared, or vendor-default credentials in deployment images; automate per-installation credential generation.
• Enforce configuration baselines and continuous compliance scanning that fail any device retaining default or unchanged credentials.
• Apply least-privilege segmentation to management planes and log management-plane authentication to a centralized SIEM.
• Maintain an asset inventory of ALE deployments mapped to network exposure, and prioritize those with any external or cross-zone reachability.
• Track EPSS and CISA KEV for this CVE; escalate if exploitation evidence or public credential/PoC disclosure emerges.

References

1. National Vulnerability Database — CVE-2026-76708: https://nvd.nist.gov/vuln/detail/CVE-2026-76708
2. CWE-798: Use of Hard-coded Credentials — https://cwe.mitre.org/data/definitions/798.html
3. MITRE ATT&CK T1078.001 — Valid Accounts: Default Accounts: https://attack.mitre.org/techniques/T1078/001/
4. Aruba Networks (Hewlett Packard Enterprise) Security Advisories portal — consult for an authoritative fix when published: https://www.arubanetworks.com/support-services/security-bulletins/
5. CISA Known Exploited Vulnerabilities Catalog (status check): https://www.cisa.gov/known-exploited-vulnerabilities-catalog

No public PoC, Nuclei template, or exploit code exists in tracked sources. CISA KEV status is NO and no exploit-in-the-wild or named threat-actor campaign is associated with CVE-2026-76708 in the provided data. EPSS is 0.00594 (46.1st percentile), consistent with a currently unweaponized but trivially exploitable default-credential flaw.