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Fencer Vulns
medium 6.5

CVE-2021-25667 json

A vulnerability has been identified in RUGGEDCOM RM1224 (All versions >= V4.3 and < V6.4), SCALANCE M-800 (All versions >= V4.3 and < V6.4)…

published 2021-03-15 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-12559

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 61%
public exploits
0
none known

Summary

A vulnerability has been identified in RUGGEDCOM RM1224 (All versions >= V4.3 and < V6.4), SCALANCE M-800 (All versions >= V4.3 and < V6.4), SCALANCE S615 (All versions >= V4.3 and < V6.4), SCALANCE SC-600 Family (All versions >= V2.0 and < V2.1.3), SCALANCE XB-200 (All versions < V4.1), SCALANCE XC-200 (All versions < V4.1), SCALANCE XF-200BA (All versions < V4.1), SCALANCE XM400 (All versions < V6.2), SCALANCE XP-200 (All versions < V4.1), SCALANCE XR-300WG (All versions < V4.1), SCALANCE XR500 (All versions < V6.2). Affected devices contain a stack-based buffer overflow vulnerability in the handling of STP BPDU frames that could allow a remote attacker to trigger a denial-of-service condition or potentially remote code execution. Successful exploitation requires the passive listening feature of the device to be active.

Patch / fix

  • siemens ruggedcom_rm1224_firmware 6.4
  • siemens scalance_m-800_firmware 6.4
  • siemens scalance_s615_firmware 6.4
  • siemens scalance_x300wg_firmware 4.1
  • siemens scalance_xm400_firmware 6.2
  • siemens scalance_xr500_firmware 6.2
  • siemens scalance_sc622-2c_firmware 2.1.3
  • siemens scalance_sc632-2c_firmware 2.1.3
  • siemens scalance_sc636-2c_firmware 2.1.3
  • siemens scalance_sc642-2c_firmware 2.1.3
  • siemens scalance_sc646-2c_firmware 2.1.3
  • siemens scalance_xb-200_firmware 4.1
  • siemens scalance_xc-200_firmware 4.1
  • siemens scalance_xf-200ba_firmware 4.1
  • siemens scalance_xp-200_firmware 4.1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-21-068-03 updated cvss 8.8

Siemens SCALANCE and RUGGEDCOM Devices (Update A)

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
5 mo ago

Exploit prediction

0.95% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 6.5 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 8.8 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 6.5 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.8 AV:A/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • Siemens RUGGEDCOM RM1224
  • Siemens SCALANCE M-800
  • Siemens SCALANCE S615
  • Siemens SCALANCE SC-600 Family
  • Siemens SCALANCE XB-200
  • Siemens SCALANCE XC-200
  • Siemens SCALANCE XF-200BA
  • Siemens SCALANCE XM400
  • Siemens SCALANCE XP-200
  • Siemens SCALANCE XR-300WG
  • Siemens SCALANCE XR500

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.