CVE-2022-26647

Severity: high (CVSS 7.5 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-07-12 · updated 2026-06-17
Weakness: CWE-330

Description

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: all versions
Siemens Scalance X201-3P Irt Firmware: all versions
Siemens Scalance X201-3P Irt Pro Firmware: all versions
Siemens Scalance X202-2Irt Firmware: all versions
Siemens Scalance X202-2P Irt Firmware: all versions
Siemens Scalance X202-2P Irt Pro Firmware: all versions
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: all versions
Siemens Scalance X204Irt Pro Firmware: all versions
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: all versions
Siemens Scalance Xf202-2P Irt Firmware: all versions
Siemens Scalance Xf204-2 Firmware: before 5.2.6 — fixed in 5.2.6
Siemens Scalance Xf204-2Ba Irt Firmware: all versions
Siemens Scalance Xf204 Firmware: before 5.2.6 — fixed in 5.2.6
Siemens Scalance Xf204Irt Firmware: all versions
Siemens Scalance Xf206-1 Firmware: before 5.2.6 — fixed in 5.2.6
Siemens Scalance Xf208 Firmware: before 5.2.6 — fixed in 5.2.6

How to fix

Upgrade to a fixed version: Siemens Scalance X204-2 Firmware 5.2.6; Siemens Scalance X204-2Fm Firmware 5.2.6; Siemens Scalance X204-2Ld Firmware 5.2.6; Siemens Scalance X204-2Ld Ts Firmware 5.2.6; Siemens Scalance X204-2Ts Firmware 5.2.6; Siemens Scalance X206-1 Firmware 5.2.6; Siemens Scalance X206-1Ld Firmware 5.2.6; Siemens Scalance X208 Firmware 5.2.6; Siemens Scalance X208 Pro Firmware 5.2.6; Siemens Scalance X212-2 Firmware 5.2.6; Siemens Scalance X212-2Ld Firmware 5.2.6; Siemens Scalance X216 Firmware 5.2.6. Check the vendor advisory for mitigations.

References

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