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Sd WanApplication · Arubanetworks

CVE-2021-37721

HIGH · 7.2 CVSS v3.1 Published 2021-09-07
Fix available
A fix is available. Upgrade to 2.2.0.4 / 6.4.4.25 or later.
See remediation →
78/100
Remediation priority · High
Remotely reachable Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
A remote arbitrary command execution vulnerability was discovered in Aruba SD-WAN Software and Gateways; Aruba Operating System Software version(s): Prior to 8.6.0.4-2.2.0.4; Prior to 8.7.1.4, 8.6.0.9, 8.5.0.13, 8.3.0.16, 6.5.4.20, 6.4.4.25. Aruba has released patches for Aruba SD-WAN Software and Gateways and ArubaOS that address this security vulnerability.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

A remote arbitrary command execution vulnerability exists in Aruba SD-WAN Software and Gateways and ArubaOS. The vulnerability allows an unauthenticated attacker to execute arbitrary commands on affected devices due to insufficient input validation. This affects multiple version branches of ArubaOS prior to the patched releases (8.6.0.4-2.2.0.4, 8.7.1.4, 8.6.0.9, 8.5.0.13, 8.3.0.16, 6.5.4.20, 6.4.4.25).

MitigationApply the available patches from Aruba for the specific version branch in use. Organizations should upgrade to a patched version and verify the fix through penetration testing or vulnerability scanning.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Sd WanApplication
Affected:>= 2.2.0.0, < 2.2.0.4
ArubaosOperating system
Affected:>= 6.4.4.0, < 6.4.4.25>= 6.5.4.0, < 6.5.4.20>= 8.3.0.0, < 8.3.0.16>= 8.5.0.0, < 8.5.0.13>= 8.6.0.0, < 8.6.0.9>= 8.7.0.0, < 8.7.1.4
Scalance W1750d FirmwareOperating system
Affected:all versions

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify the product and version
    Access the device CLI or web interface and run 'show version' or check the firmware version in the web UI under Maintenance > Firmware or similar
    Affected if The device is Aruba SD-WAN, ArubaOS, or Siemens Scalance W1750d and the version falls within the affected ranges
  2. Compare ArubaOS version against affected ranges
    Check if ArubaOS version is: 6.4.4.0 to 6.4.4.24, 6.5.4.0 to 6.5.4.19, 8.3.0.0 to 8.3.0.15, 8.5.0.0 to 8.5.0.12, 8.6.0.0 to 8.6.0.8, or 8.7.0.0 to 8.7.1.3
    Affected if The installed ArubaOS version is within any of these unpatched ranges
  3. Compare Aruba SD-WAN version against affected ranges
    Check if SD-WAN software version is 2.2.0.0 to 2.2.0.3
    Affected if The installed SD-WAN version is within this unpatched range
  4. Confirm Siemens Scalance W1750d firmware
    Verify the device model is Siemens Scalance W1750d
    Affected if The device is a Siemens Scalance W1750d (all versions are affected)
  5. Check for unauthenticated management interface exposure
    Review network configuration to determine if the web management interface (ports 80/443) is accessible from untrusted networks
    Affected if The management interface is exposed to the internet or untrusted networks without VPN/IP allow-listing

A user is affected if they run any ArubaOS version listed in the affected ranges, Aruba SD-WAN 2.2.0.0-2.2.0.3, or any Siemens Scalance W1750d firmware, with the management interface accessible to attackers.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 2.2.0.4 / 6.4.4.25 / 6.5.4.20 or later
Fixed in 2.2.0.46.4.4.256.5.4.20
Interim mitigation

Apply the available patches from Aruba for the specific version branch in use. Organizations should upgrade to a patched version and verify the fix through penetration testing or vulnerability scanning.

Recommended fix High confidence

ArubaOS 6.4.4.25+, 6.5.4.20+, 8.3.0.16+, 8.5.0.13+, 8.6.0.9+, 8.7.1.4+ / SD-WAN 2.2.0.4+

  1. 1. Identify the exact Aruba product and current firmware version using 'show version' or the management interface.
  2. 2. For SD-WAN devices: Upgrade to version 2.2.0.4 or later (or 8.6.0.4-2.2.0.4 if using that release train).
  3. 3. For ArubaOS devices on 6.4.x branch: Upgrade to version 6.4.4.25 or later.
  4. 4. For ArubaOS devices on 6.5.x branch: Upgrade to version 6.5.4.20 or later.
  5. 5. For ArubaOS devices on 8.3.x branch: Upgrade to version 8.3.0.16 or later.
  6. 6. For ArubaOS devices on 8.5.x branch: Upgrade to version 8.5.0.13 or later.
  7. 7. For ArubaOS devices on 8.6.x branch: Upgrade to version 8.6.0.9 or later.
  8. 8. For ArubaOS devices on 8.7.x branch: Upgrade to version 8.7.1.4 or later.
Caveat Review Aruba upgrade instructions for any specific upgrade path requirements between major versions; some branches may require intermediate upgrades

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Sd Wan Scoped from the published advisory
  • Consultation3.0 h
  • Implementation4.0 h
  • Testing4.0 h
  • Review / QA2.0 h
13.0 hours of engineering $2,280
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2021-37721 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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  • No spam, self-promotion, credentials, or personal data