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CVE-2021-25676

HIGH
7.5
CVSS Score
Published: March 15, 2021 at 05:03 PM UTC
Updated: June 17, 2026 at 03:42 AM UTC
8 products affected across 1 vendorScalance S615 FirmwareScalance M 800 FirmwareRUGGEDCOM RM1224 Firmware

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Severity
HIGH7.5
Exploit prediction
EPSS 1%

Description

A vulnerability has been identified in RUGGEDCOM RM1224 (V6.3), SCALANCE M-800 (V6.3), SCALANCE S615 (V6.3), SCALANCE SC-600 (All Versions >= V2.1 and < V2.1.3). Multiple failed SSH authentication attempts could trigger a temporary Denial-of-Service under certain conditions. When triggered, the device will reboot automatically.

Affected

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

RUGGEDCOM RM1224 Firmware· Siemens
95%
6.3
Scalance M 800 Firmware· Siemens
95%
6.3
siemens-scalance-m-800 (same device)
Scalance S615 Firmware· Siemens
95%
6.3
Scalance Sc 600 Firmware· Siemens
95%
2.1 ≤ v < 2.1.3
Affected range stops below 2.1.3, so it looks safe — our inference, not a vendor statement
siemens-scalance-sc-600 (same device)
SCALANCE M-800· Siemens
60%
6.3
SCALANCE SC-600· Siemens
60%
All Versions >= V2.1 and < V2.1.3
Ruggedcom Rm1224· Siemensdevice
80%
All versions
Scalance S615· Siemensdevice
80%
All versions

Remediation

No guide yet

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

Patch and advisory references

References (2)

x_refsource_MISCVendor Advisory
Source: [email protected]
https://cert-portal.siemens.com/productcert/pdf/ssa-296266.pdf
x_refsource_CONFIRMThird Party AdvisoryUS Government Resource
Source: [email protected]
https://us-cert.cisa.gov/ics/advisories/icsa-21-068-02

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-307

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