CVE-2021-25156

mediumpriority · track · 44EPSS 0.397 · 99 %ileexploit · PoCDEEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

39.6% (99th) EPSS

CVSS 4 · medium

Is it mine?

18 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-26

A remote arbitrary directory create vulnerability was discovered in some Aruba Instant Access Point (IAP) products in version(s): Aruba Instant 6.4.x: 6.4.4.8-4.2.4.17 and below; Aruba Instant 6.5.x: 6.5.4.18 and below; Aruba Instant 8.3.x: 8.3.0.14 and below; Aruba Instant 8.5.x: 8.5.0.11 and below; Aruba Instant 8.6.x: 8.6.0.6 and below; Aruba Instant 8.7.x: 8.7.1.0 and below. Aruba has released patches for Aruba Instant that address this security vulnerability.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedSCALANCE W1750Dsiemens_psirt
Update to V8.7.1.3 or later version
https://support.industry.siemens.com/cs/de/en/view/109802805/
FixedSCALANCE W1750Dcisa_csaf_ot
Update to V8.7.1.3 or later version
https://support.industry.siemens.com/cs/de/en/view/109802805/
MitigationSCALANCE W1750Dsiemens_psirt
Block access to the Aruba Instant Command Line Interface from all untrusted users
MitigationSCALANCE W1750Dcisa_csaf_ot
Block access to the Aruba Instant Command Line Interface from all untrusted users

cvss

Technical severity, 0–10. One row per scoring source.

4.9

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04mediumAV:N/AC:L/Au:S/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 8 · impact 2.9

v3.14.9mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:Nprimary · NVD / NIST USexploitability 1.2 · impact 3.6

v3.14.9mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N/E:P/RL:O/RC:Csecondary · CISA US

v3.14.9mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE

v3.14.9mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N/E:Hsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USCWE-20US

exploits (1)

Public proof-of-concept and weaponised exploit code.

EDB-50136Aruba Instant (IAP) - Remote Code ExecutionPoC · exploit_db

affected products (18)

Products and version ranges known to be affected.

SCALANCE W1750Dall versionscisa_csaf_otUS
Siemens SCALANCE W1750D< V8.7.0cisa_csaf_otUS
Siemens SCALANCE W1750DV8.7.0_and_ → V8.7.1.3cisa_csaf_otUS
n/a Aruba Instant Access Points≤ Aruba Instant 8.7.x: 8.7.1.0 and belowenisa_euvdEU
n/a Aruba Instant Access Points≤ Aruba Instant 6.5.x: 6.5.4.18 and belowenisa_euvdEU
n/a Aruba Instant Access Points≤ Aruba Instant 8.5.x: 8.5.0.11 and belowenisa_euvdEU
n/a Aruba Instant Access Points≤ Aruba Instant 8.3.x: 8.3.0.14 and belowenisa_euvdEU
n/a Aruba Instant Access Points≤ Aruba Instant 8.6.x: 8.6.0.6 and belowenisa_euvdEU
n/a Aruba Instant Access Points≤ Aruba Instant 6.4.x: 6.4.4.8-4.2.4.17 and belowenisa_euvdEU
arubanetworks instant6.4.0.0 → 6.4.4.8-4.2.4.18nvdUScpe:2.3:o:arubanetworks:instant:*:*:*:*:*:*:*:*
arubanetworks instant6.5.0.0 → 6.5.4.19nvdUScpe:2.3:o:arubanetworks:instant:*:*:*:*:*:*:*:*
arubanetworks instant8.3.0.0 → 8.3.0.15nvdUScpe:2.3:o:arubanetworks:instant:*:*:*:*:*:*:*:*
arubanetworks instant8.5.0.0 → 8.5.0.12nvdUScpe:2.3:o:arubanetworks:instant:*:*:*:*:*:*:*:*
arubanetworks instant8.6.0.0 → 8.6.0.7nvdUScpe:2.3:o:arubanetworks:instant:*:*:*:*:*:*:*:*
arubanetworks instant8.7.1.0 → 8.7.1.1nvdUScpe:2.3:o:arubanetworks:instant:*:*:*:*:*:*:*:*
siemens scalance w1750d firmware8.7.0 → 8.7.1.3nvdUScpe:2.3:o:siemens:scalance_w1750d_firmware:*:*:*:*:*:*:*:*
Siemens SCALANCE W1750D< V8.7.0siemens_psirtDE
Siemens SCALANCE W1750DV8.7.0 and → V8.7.1.3siemens_psirtDE

advisories (2)

Vendor and ecosystem advisories describing this.

SSA-723417SSA-723417: Multiple Vulnerabilities in SCALANCE W1750D2021-05-11csaf · siemens_psirtDE
The Scalance W1750D device contains multiple vulnerabilities that could allow an attacker to inject commands or trigger buffer overflows. Siemens has released updates for the affected products and recommends to update to the latest versions.
ICSA-21-131-14Siemens SCALANCE W1750D (Update B)2021-05-11icsa · cisa_csaf_otUS
The Scalance W1750D device contains multiple vulnerabilities that could allow an attacker to inject commands or trigger buffer overflows. Siemens has released updates for the affected products and recommends to update to the latest versions.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cisa_csaf_ot nvd siemens_psirt NVD CVE.org MITRE

published 2021-03-30modified 2026-06-17

references (12)

External citations — patches, advisories, analysis.

scry

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