CVE-2022-25622

HIGH
7.5
CVSS Score
Published: April 12, 2022 at 12:00 AM UTC
Updated: June 17, 2026 at 04:33 AM UTC
85 products affected across 1 vendorSIMATIC S7-1500 CPU FirmwareSIMATIC S7-300 CPU FirmwareSIMATIC S7-400 Pn /dp V7 Firmware

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Severity
HIGH7.5
Exploit prediction
EPSS 0.9%
SSVC
No known exploit

Description

The PROFINET (PNIO) stack, when integrated with the Interniche IP stack, improperly handles internal resources for TCP segments where the minimum TCP-Header length is less than defined. This could allow an attacker to create a denial of service condition for TCP services on affected devices by sending specially crafted TCP segments.

Affected

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

v < 2.0.0
Affected range stops below 2.0.0, so it looks safe — our inference, not a vendor statement
siemens-simatic-s7-1500-cpu (same device)
All versions
siemens-simatic-s7-300-cpu (same device)
All versions
siemens-simatic-s7-400-pn-dp-v7 (same device)
All versions
siemens-simatic-s7-400h-v6 (same device)
All versions
siemens-simatic-s7-410-v10 (same device)
All versions
siemens-simatic-s7-410-v8 (same device)
All versions
siemens-simatic-winac-rtx (same device)

Remediation

No guide yet

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

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-400

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