Security readout for executives and security teams
Plain-English summary
NCH Software ExpressZip 11.29 may run attacker-chosen code when a user downloads and executes a crafted archive. Successful exploitation could expose data, modify system contents, or disrupt operations. User interaction is required, and the supplied evidence does not confirm attacks in the wild.
Executive priority
Treat this as a high-priority endpoint risk where ExpressZip 11.29 handles external files. Prioritize inventory and exposure reduction promptly. It is not supported as an emergency active-exploitation event because user interaction is required and the supplied sources provide no exploitation evidence.
Technical view
The record assigns CVSS 3.1 score 8.8 with AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H and CWE-693. It describes remote, low-complexity exploitation requiring no privileges but requiring user action, with potentially high confidentiality, integrity, and availability impact. The underlying defect, platforms, and execution context are unspecified.
Likely exposure
Endpoints running NCH Software ExpressZip 11.29 that process untrusted archive files are the clearest exposed population. Structured affected-product fields contain no usable vendor, product, CPE, or broader version data, so exposure beyond the specifically named release cannot be established.
Exploitation context
The bundle marks this CVE as absent from KEV and provides no evidence of active exploitation. Exploitation requires downloading and executing a crafted archive. A public technical reference is listed, but the supplied material does not establish proof-of-concept availability, attack prevalence, or observed targeting.
Researcher notes
The sources do not identify the vulnerable parser, archive formats, affected operating systems, root cause, fix status, or complete version range. CWE-693 is too broad to infer those details. Treat version 11.29 as specifically identified, without assuming earlier or later releases are affected or safe.
Mitigation direction
- Inventory ExpressZip installations and prioritize systems running version 11.29.
- Prevent version 11.29 from handling untrusted archives until authoritative vendor guidance is reviewed.
- Restrict or quarantine unexpected archive downloads using existing email, web, and endpoint controls.
- Check NCH Software guidance for confirmed fixed versions or mitigations; none are named in the supplied sources.
Validation and detection
- Query software inventory for NCH Software ExpressZip version 11.29.
- Identify endpoints where ExpressZip processes internet-delivered or externally supplied archives.
- Review endpoint telemetry for ExpressZip activity followed by unexpected child processes or security alerts.
- Verify any upgrade or mitigation against current vendor guidance before closing findings.
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-693: 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2025-44089 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
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/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
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:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H2.85.9CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/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://github.com/OV-0-VO/Public-references/blob/main/CVE-2025-44089.mdCVE reference, mitre
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.
Protection Mechanism Failure
Protection Mechanism Failure represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.