CVE-2021-25668

CRITICAL

Siemens Scalance X200-4p Irt Firmware < 5.5.1 - Out-of-Bounds Write

Title source: rule
STIX 2.1

Description

A vulnerability has been identified in SCALANCE X200-4P IRT (All versions < 5.5.1), SCALANCE X201-3P IRT (All versions < 5.5.1), SCALANCE X201-3P IRT PRO (All versions < 5.5.1), SCALANCE X202-2 IRT (All versions < 5.5.1), SCALANCE X202-2P IRT (incl. SIPLUS NET variant) (All versions < 5.5.1), SCALANCE X202-2P IRT PRO (All versions < 5.5.1), SCALANCE X204 IRT (All versions < 5.5.1), SCALANCE X204 IRT PRO (All versions < 5.5.1), SCALANCE X204-2 (incl. SIPLUS NET variant) (All versions < V5.2.5), SCALANCE X204-2FM (All versions < V5.2.5), SCALANCE X204-2LD (incl. SIPLUS NET variant) (All versions < V5.2.5), SCALANCE X204-2LD TS (All versions < V5.2.5), SCALANCE X204-2TS (All versions < V5.2.5), SCALANCE X206-1 (All versions < V5.2.5), SCALANCE X206-1LD (All versions < V5.2.5), SCALANCE X208 (incl. SIPLUS NET variant) (All versions < V5.2.5), SCALANCE X208PRO (All versions < V5.2.5), SCALANCE X212-2 (incl. SIPLUS NET variant) (All versions < V5.2.5), SCALANCE X212-2LD (All versions < V5.2.5), SCALANCE X216 (All versions < V5.2.5), SCALANCE X224 (All versions < V5.2.5), SCALANCE XF201-3P IRT (All versions < 5.5.1), SCALANCE XF202-2P IRT (All versions < 5.5.1), SCALANCE XF204 (All versions < V5.2.5), SCALANCE XF204 IRT (All versions < 5.5.1), SCALANCE XF204-2 (incl. SIPLUS NET variant) (All versions < V5.2.5), SCALANCE XF204-2BA IRT (All versions < 5.5.1), SCALANCE XF206-1 (All versions < V5.2.5), SCALANCE XF208 (All versions < V5.2.5). Incorrect processing of POST requests in the webserver may result in write out of bounds in heap. An attacker might leverage this to cause denial-of-service on the device and potentially remotely execute code.

References (1)

Core 1
Core References
Patch, Vendor Advisory x_refsource_misc
https://cert-portal.siemens.com/productcert/pdf/ssa-187092.pdf

Scores

CVSS v3 9.8
EPSS 0.0128
EPSS Percentile 79.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-122 CWE-787
Status published
Products (29)
siemens/scalance_x200-4p_irt_firmware < 5.5.1
siemens/scalance_x201-3p_irt_firmware < 5.5.1
siemens/scalance_x201-3p_irt_pro_firmware < 5.5.1
siemens/scalance_x202-2_irt_firmware < 5.5.1
siemens/scalance_x202-2p_irt_firmware < 5.5.1
siemens/scalance_x202-2p_irt_pro_firmware < 5.5.1
siemens/scalance_x204-2_firmware < 5.2.5
siemens/scalance_x204-2fm_firmware < 5.2.5
siemens/scalance_x204-2ld_firmware < 5.2.5
siemens/scalance_x204-2ld_ts_firmware < 5.2.5
... and 19 more
Published Apr 22, 2021
Tracked Since Feb 18, 2026