Security readout for executives and security teams
Plain-English summary
Several Siemens SCALANCE industrial Ethernet switches can be crashed through an HTTP request parameter validation flaw. For executives, the main risk is loss of availability in operational networks, potentially disrupting plant, process, or automation communications. The affected firmware is older than V5.5.2 or V5.2.6, depending on model.
Executive priority
Prioritize remediation where affected switches support production, safety, or remote operations. This is primarily an availability risk, but industrial network outages can create disproportionate business impact.
Technical view
CVE-2022-26648 is improper validation of the HTTP GET parameter XNo on listed Siemens SCALANCE devices. The source maps it to CWE-120 and CVSS 3.1 score 8.2. The stated impact is device crash, with high availability impact and limited confidentiality/integrity impact in the CVSS vector.
Likely exposure
Exposure is likely in industrial or OT environments using affected Siemens SCALANCE X200/XF200-family switches with HTTP management reachable from untrusted or weakly segmented networks. Internet exposure is not evidenced in the bundle.
Exploitation context
The bundle does not show CISA KEV listing or confirmed active exploitation. Siemens states an unauthenticated remote attacker could crash affected devices, but the CVSS vector lists adjacent attack complexity context and PR:L, so validate against the Siemens advisory.
Researcher notes
Evidence is limited to the CVE data and Siemens advisory reference. The affected list is broad and duplicated in places. Treat product/version matching carefully and avoid assuming exploitability beyond reachable HTTP management on listed firmware.
Mitigation direction
- Upgrade affected IRT models to V5.5.2 or later.
- Upgrade affected non-IRT listed models to V5.2.6 or later.
- Review Siemens SSA-310038 for model-specific guidance.
- Restrict HTTP management access to trusted administration networks.
- Segment OT networks to limit access to switch management interfaces.
- Monitor affected switches for unexpected resets or availability loss.
Validation and detection
- Inventory Siemens SCALANCE X200 and XF200-family switches.
- Record exact model names and firmware versions.
- Compare firmware against V5.5.2 or V5.2.6 thresholds.
- Confirm HTTP management is not reachable from untrusted networks.
- Check whether devices appear in remote-access or vendor-maintenance paths.
- Track Siemens advisory updates for corrected guidance.
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-2022-26648 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
- High
- CVSS
- 8.2 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:L/I:L/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:L/UI:N/S:C/C:L/I:L/A:H/E:P/RL:O/RC:C2.35.3Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.2HighVector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:L/I:L/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.