CVE-2021-37735

mediumpriority · track · 21EPSS 0.013 · 70 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.29% (70th) EPSS

CVSS 5 · medium

Is it mine?

10 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-26

A remote denial of service vulnerability was discovered in Aruba Instant version(s): Aruba Instant 6.5.x.x: 6.5.4.18 and below; Aruba Instant 8.5.x.x: 8.5.0.10 and below; Aruba Instant 8.6.x.x: 8.6.0.4 and below. Aruba has released patches for Aruba Instant (IAP) 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/ww/en/view/109802805/
FixedSCALANCE W1750Dcisa_csaf_ot
Update to V8.7.1.3 or later version
https://support.industry.siemens.com/cs/ww/en/view/109802805/
WorkaroundSCALANCE W1750Dsiemens_psirt
Block access for Aruba Instant device on port UDP/8211 from all untrusted users
WorkaroundSCALANCE W1750Dcisa_csaf_ot
Block access for Aruba Instant device on port UDP/8211 from all untrusted users

cvss

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

5.3

010

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

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lprimary · NVD / NIST USexploitability 3.9 · impact 1.4

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

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

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-134USprimaryCWE-400USCWE-400US

affected products (10)

Products and version ranges known to be affected.

SCALANCE W1750Dall versionscisa_csaf_otUS
Siemens SCALANCE W1750D< V8.7.1.3cisa_csaf_otUS
n/a HPE Aruba Instant (IAP)≤ Aruba Instant 8.6.x.x: 8.6.0.4 and belowenisa_euvdEU
n/a HPE Aruba Instant (IAP)≤ Aruba Instant 6.5.x.x: 6.5.4.18 and belowenisa_euvdEU
n/a HPE Aruba Instant (IAP)≤ Aruba Instant 8.5.x.x: 8.5.0.10 and belowenisa_euvdEU
arubanetworks aruba instant6.5.4.0 → 6.5.4.18nvdUScpe:2.3:a:arubanetworks:aruba_instant:*:*:*:*:*:*:*:*
arubanetworks aruba instant8.5.0.0 → 8.5.0.11nvdUScpe:2.3:a:arubanetworks:aruba_instant:*:*:*:*:*:*:*:*
arubanetworks aruba instant8.6.0.0 → 8.6.0.5nvdUScpe:2.3:a:arubanetworks:aruba_instant:*:*:*:*:*:*:*:*
siemens scalance w1750d firmware< 8.7.1.3nvdUScpe:2.3:o:siemens:scalance_w1750d_firmware:*:*:*:*:*:*:*:*
Siemens SCALANCE W1750D< V8.7.1.3siemens_psirtDE

advisories (2)

Vendor and ecosystem advisories describing this.

SSA-917476SSA-917476: Multiple Vulnerabilities in SCALANCE W1750D2021-11-09csaf · siemens_psirtDE
The Scalance W1750D device contains multiple vulnerabilities that could allow an attacker to execute code on the affected device(s), read arbitrary files, or create a denial-of-service condition. Siemens has released updates for the affected products and recommends to update to the latest versions.
ICSA-21-315-06Siemens SCALANCE W1750D2021-11-09icsa · cisa_csaf_otUS
The Scalance W1750D device contains multiple vulnerabilities that could allow an attacker to execute code on the affected device(s), read arbitrary files, or create a denial-of-service condition. 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 2021-10-12modified 2026-06-17

related (781)

Related entries.

ID	severity	EPSS	exploitable	published
CVE-2024-23113US	critical9.8OT critical	61.7% (99th)	KEV	2024-02-15
A use of externally-controlled format string in Fortinet FortiOS versions 7.4.0 through 7.4.2, 7.2.0 through 7.2.6, 7.0.0 through 7.0.13, FortiProxy versions 7.4.0 through 7.4.2, 7…
CVE-2021-25489US	medium5.5OT critical	0.53% (45th)	KEV	2021-10-06
Assuming radio permission is gained, missing input validation in modem interface driver prior to SMR Oct-2021 Release 1 results in format string bug leading to kernel panic.
CVE-2020-3118US	high8.8OT critical	11.7% (96th)	KEV	2020-02-05
A vulnerability in the Cisco Discovery Protocol implementation for Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to execute arbitrary code or cause a relo…
CVE-2019-1579US	high8.1OT critical	44.2% (99th)	KEV	2019-07-19
Remote Code Execution in PAN-OS 7.1.18 and earlier, PAN-OS 8.0.11-h1 and earlier, and PAN-OS 8.1.2 and earlier with GlobalProtect Portal or GlobalProtect Gateway Interface enabled…
CVE-2018-0175US	high8.0OT critical	3.48% (89th)	KEV	2018-03-28
Format String vulnerability in the Link Layer Discovery Protocol (LLDP) subsystem of Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software could allow an unauthentic…

+776 more

references (10)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan