Security readout for executives and security teams
Plain-English summary
Certain Siemens SCALANCE devices can be crashed by unauthenticated HTTP GET requests because they do not properly validate request URIs. For organizations using these devices in operational networks, the business risk is loss of network availability. The provided sources do not confirm active exploitation.
Executive priority
Treat as high-priority for OT and plant networks using affected Siemens SCALANCE devices. The main concern is preventable network disruption, especially where device management is reachable beyond a tightly controlled admin segment.
Technical view
CVE-2022-26649 affects multiple Siemens SCALANCE X200/XF200 models below V5.5.2 or V5.2.6, depending on model. The issue is improper URI validation for incoming HTTP GET requests, mapped to CWE-120. CVSS 3.1 is 9.6 with adjacent-network attack vector and no privileges or user interaction required.
Likely exposure
Exposure is most likely where affected SCALANCE devices have HTTP management reachable from adjacent or operational network segments. Internet exposure is not stated in the provided sources. Asset inventory and firmware validation are needed to determine real exposure.
Exploitation context
The CVE record lists exploit maturity as proof-of-concept, but the source bundle marks CISA KEV as false. No cited source in the bundle states active exploitation in the wild.
Researcher notes
The supplied description supports a denial-of-service interpretation, while the CVSS vector also scores confidentiality and integrity high. Do not infer data theft or command execution from the provided evidence alone. The source bundle does not include exploit details or active exploitation confirmation.
Mitigation direction
- Identify affected SCALANCE models and firmware versions in production networks.
- Upgrade affected V5.5.x-family devices to V5.5.2 or later where applicable.
- Upgrade affected V5.2.x-family devices to V5.2.6 or later where applicable.
- Restrict HTTP management access to trusted administrative networks.
- Review Siemens SSA-310038 for model-specific guidance before maintenance windows.
Validation and detection
- Compare device model and firmware against the affected version ranges.
- Confirm HTTP management interfaces are not broadly reachable.
- Check monitoring for unexplained SCALANCE device crashes or reboots.
- Verify upgraded devices report fixed firmware versions after maintenance.
- Document compensating controls for devices that cannot be upgraded immediately.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-120: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2022-26649 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.6 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C2.86Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.6CriticalVector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- https://cert-portal.siemens.com/productcert/pdf/ssa-310038.pdfCVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.