CVE-2021-25666

MEDIUM
4.3
CVSS Score
Published: February 9, 2021 at 03:38 PM UTC
Updated: June 17, 2026 at 03:42 AM UTC
4 products affected across 1 vendorScalance W780 FirmwareScalance W740 FirmwareSCALANCE W740

Using SCALANCE W780 and W740 (IEEE 802.11n) family by Siemens?

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.7%

Description

A vulnerability has been identified in SCALANCE W780 and W740 (IEEE 802.11n) family (All versions < V6.3). Sending specially crafted packets through the ARP protocol to an affected device could cause a partial denial-of-service, preventing the device to operate normally for a short period of time.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 6.3
Affected range stops below 6.3, so it looks safe — our inference, not a vendor statement
siemens-scalance-w740 (same device)
v < 6.3
Affected range stops below 6.3, so it looks safe — our inference, not a vendor statement
siemens-scalance-w780 (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (2)

CVSS

Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-770

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