Security readout for executives and security teams
Plain-English summary
A logged-in, low-privilege user could upload a malicious Arc archive to vulnerable Nozomi Guardian or CMC systems and write files outside the intended location. This could change device configuration or disrupt availability. The vulnerability is rated high severity at CVSS 8.1.
Executive priority
Prioritize remediation for vulnerable systems where non-administrative users can import archives, especially operationally critical deployments. The main business risks are unauthorized configuration changes and device outages. Accelerate investigation if unusual imports, configuration drift, or unexplained instability are present.
Technical view
CVE-2025-40898 is a CWE-22 path traversal flaw in Arc archive import validation before version 25.5.0. It is network-accessible, low complexity, requires limited privileges, and needs no user interaction. Successful exploitation can cause high integrity and availability impact; the supplied CVSS vector indicates no confidentiality impact.
Likely exposure
Exposure applies to Guardian or CMC deployments before 25.5.0 where authenticated limited-privilege users can access Arc archive import functionality. Internet exposure is not required, but network access and valid credentials are. The bundle’s structured affected-version entries are inconsistent with its title, so confirm applicability against vendor guidance.
Exploitation context
The supplied evidence does not establish active exploitation, and the CVE is not listed as KEV in the bundle. Exploitation requires authentication and a specially crafted Arc archive, reducing opportunistic risk. Compromised or untrusted low-privilege accounts remain a credible path to configuration tampering or service disruption.
Researcher notes
The weakness is improper archive-path validation consistent with CWE-22. Defensive review should focus on whether extracted member paths can escape the intended directory and whether overwrite protections exist. The provided structured version data contains placeholder-like entries conflicting with the title’s before-25.5.0 boundary; use the vendor advisory as the applicability authority.
Mitigation direction
- Upgrade affected Guardian and CMC installations to version 25.5.0 or later, following vendor guidance.
- Restrict Arc archive import access to trusted administrators until upgrades are complete.
- Review and reduce limited-privilege accounts that can reach the import function.
- Limit management-interface network access to authorized administrative networks.
Validation and detection
- Inventory Guardian and CMC versions and identify installations earlier than 25.5.0.
- Confirm which roles and accounts can use Arc archive import functionality.
- Review import activity for unexpected archives, users, or timing.
- Inspect affected devices for unexplained file, configuration, or availability changes.
- Confirm upgraded systems report version 25.5.0 or later.
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-22: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. 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 lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2025-40898 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-2025:15-01CVE 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.
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.