Security readout for executives and security teams
Plain-English summary
CVE-2025-40897 lets a low-privileged, authenticated Threat Intelligence user do actions that should require administrative rights. In business terms, someone granted view-only access could change threat intelligence rules or disrupt their availability, weakening monitoring integrity in Guardian or CMC environments before 26.0.0.
Executive priority
Treat this as a high-priority access control issue for OT security monitoring platforms. It can let a low-privileged authenticated user weaken detection rules or disrupt their availability, but the bundle does not show active exploitation.
Technical view
This is CWE-863 incorrect authorization in Nozomi Networks Guardian and CMC Threat Intelligence before 26.0.0. The CVSS 3.1 score is 8.1, with network access, low privileges, no user interaction, high integrity impact, and high availability impact. The bundle reports no confidentiality impact.
Likely exposure
Exposure is most likely where Guardian or CMC deployments use Threat Intelligence and grant view-only access to authenticated users. The source bundle does not establish internet exposure, default enablement, or exact affected build ranges beyond before 26.0.0.
Exploitation context
The provided bundle does not cite active exploitation, and KEV status is false. Exploitation requires an authenticated user with view-only Threat Intelligence privileges, so insider misuse, compromised accounts, or overbroad access are the main practical concerns.
Researcher notes
The record’s affected product entries are sparse, while the title states Guardian/CMC before 26.0.0. Validate exact product builds against vendor advisories before scoping. Avoid assuming broader Nozomi products, unauthenticated access, or exploit availability from this bundle.
Mitigation direction
- Identify Guardian and CMC deployments below 26.0.0.
- Follow Nozomi and Siemens advisory guidance for fixed versions or mitigations.
- Review Threat Intelligence view-only role assignments immediately.
- Restrict Threat Intelligence access to trusted administrators until remediated.
- Monitor for unauthorized rule configuration or availability changes.
Validation and detection
- Inventory Guardian and CMC versions across production and OT environments.
- Confirm whether Threat Intelligence is enabled and used.
- List users with view-only Threat Intelligence privileges.
- Review audit logs for unexpected Threat Intelligence administrative actions.
- Verify remediation status against the vendor advisories.
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-863: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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-2025-40897 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
- 8.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
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.
SSVC decision data
CVSS vector scores
2 official scoresWe 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:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H2.85.2NozomiCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N——NozomiVulnerability scoring details
Base CVSS 4.0 score
7.2HighVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
Base CVSS 3.1 score
8.1HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://security.nozominetworks.com/NN-2026:1-01CVE reference, Nozomi
- https://cert-portal.siemens.com/productcert/html/ssa-827968.htmlCVE reference, siemens-SADP
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.
Incorrect Authorization
Incorrect Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.