CVE-2022-26647: Siemens Scalance x200-4p Irt Firmware

High severity, CVSS 8.8. EPSS: 1.2% chance of exploitation in the next 30 days.

A vulnerability has been identified in SCALANCE X200-4P IRT (All versions < V5.5.2), SCALANCE X201-3P IRT (All versions < V5.5.2), SCALANCE X201-3P IRT PRO (All versions < V5.5.2), SCALANCE X202-2IRT (All versions < V5.5.2), SCALANCE X202-2IRT (All versions < V5.5.2), SCALANCE X202-2P IRT (All versions < V5.5.2), SCALANCE X202-2P IRT PRO (All versions < V5.5.2), SCALANCE X204-2 (All versions < V5.2.6), SCALANCE X204-2FM (All versions < V5.2.6), SCALANCE X204-2LD (All versions < V5.2.6), SCALANCE X204-2LD TS (All versions < V5.2.6), SCALANCE X204-2TS (All versions < V5.2.6), SCALANCE X204IRT (All versions < V5.5.2), SCALANCE X204IRT (All versions < V5.5.2), SCALANCE X204IRT PRO (All versions < V5.5.2), SCALANCE X206-1 (All versions < V5.2.6), SCALANCE X206-1LD (All versions < V5.2.6), SCALANCE X208 (All versions < V5.2.6), SCALANCE X208PRO (All versions < V5.2.6), SCALANCE X212-2 (All versions < V5.2.6), SCALANCE X212-2LD (All versions < V5.2.6), SCALANCE X216 (All versions < V5.2.6), SCALANCE X224 (All versions < V5.2.6), SCALANCE XF201-3P IRT (All versions < V5.5.2), SCALANCE XF202-2P IRT (All versions < V5.5.2), SCALANCE XF204 (All versions < V5.2.6), SCALANCE XF204-2 (All versions < V5.2.6), SCALANCE XF204-2BA IRT (All versions < V5.5.2), SCALANCE XF204IRT (All versions < V5.5.2), SCALANCE XF206-1 (All versions < V5.2.6), SCALANCE XF208 (All versions < V5.2.6). The webserver of affected devices calculates session ids and nonces in an insecure manner. This could allow an unauthenticated remote attacker to brute-force session ids and hijack existing sessions.

Affected products

Siemens Scalance x200-4p Irt Firmware: any version
Siemens Scalance x201-3p Irt Firmware: any version
Siemens Scalance x201-3p Irt Pro Firmware: any version
Siemens Scalance x202-2irt Firmware: any version
Siemens Scalance x202-2p Irt Firmware: any version
Siemens Scalance x202-2p Irt Pro Firmware: any version
Siemens Scalance x204-2 Firmware: before 5.2.6 (fixed in 5.2.6)
Siemens Scalance x204-2fm Firmware: before 5.2.6 (fixed in 5.2.6)
Siemens Scalance x204-2ld Firmware: before 5.2.6 (fixed in 5.2.6)
Siemens Scalance x204-2ld Ts Firmware: before 5.2.6 (fixed in 5.2.6)
Siemens Scalance x204-2ts Firmware: before 5.2.6 (fixed in 5.2.6)
Siemens Scalance x204irt Firmware: any version
Siemens Scalance x204irt Pro Firmware: any version
Siemens Scalance x206-1 Firmware: before 5.2.6 (fixed in 5.2.6)
Siemens Scalance x206-1ld Firmware: before 5.2.6 (fixed in 5.2.6)
Siemens Scalance x208 Firmware: before 5.2.6 (fixed in 5.2.6)
Siemens Scalance x208 Pro Firmware: before 5.2.6 (fixed in 5.2.6)
Siemens Scalance x212-2 Firmware: before 5.2.6 (fixed in 5.2.6)
Siemens Scalance x212-2ld Firmware: before 5.2.6 (fixed in 5.2.6)
Siemens Scalance x216 Firmware: before 5.2.6 (fixed in 5.2.6)
Siemens Scalance x224 Firmware: before 5.2.6 (fixed in 5.2.6)
Siemens Scalance XF201-3p Irt Firmware: any version
Siemens Scalance XF202-2p Irt Firmware: any version
Siemens Scalance XF204-2 Firmware: before 5.2.6 (fixed in 5.2.6)
Siemens Scalance XF204-2ba Irt Firmware: any version
and 4 more

Published 2022-07-12. Last modified 2026-06-17.