Security readout for executives and security teams
Plain-English summary
CVE-2026-1139 is a critical buffer overflow in UTT 进取 520W firmware 1.7.7-180627. A remote authenticated attacker may be able to compromise confidentiality, integrity, and availability. Public exploit information exists, but the provided sources do not show confirmed active exploitation.
Executive priority
Prioritize this for rapid exposure reduction if affected devices exist. The combination of critical impact, remote reachability, and public exploit disclosure creates meaningful business risk, even without confirmed active exploitation. Focus first on internet-facing or shared-network administrative access.
Technical view
The issue affects strcpy handling in /goform/ConfigExceptMSN on UTT 进取 520W 1.7.7-180627. VulDB maps it to CWE-119 and CWE-120 with CVSS 2.0 score 9.0: network accessible, low complexity, single authentication required, and complete CIA impact. Vendor response and remediation are not documented in the sources.
Likely exposure
Organizations using UTT 进取 520W running firmware 1.7.7-180627 are potentially exposed, especially where the device administration interface is reachable from untrusted networks. Exposure appears to require authenticated access based on the CVSS vector and VulDB CTI reference.
Exploitation context
The vulnerability can be initiated remotely and public exploit material is referenced. However, CISA KEV is false in the provided data, and no cited source confirms in-the-wild exploitation. Treat internet-reachable or broadly accessible management interfaces as urgent risk.
Researcher notes
Evidence is mainly from VulDB, CVE records, and a public GitHub reference. The vendor reportedly did not respond, and no official patch is named. Avoid assuming other UTT models or firmware versions are affected unless separately confirmed.
Mitigation direction
- Check UTT or reseller guidance for updated firmware or official mitigation.
- Restrict device management access to trusted administrative networks only.
- Disable external access to the management interface where possible.
- Review and limit administrator accounts on affected devices.
- Consider replacement or isolation if no vendor fix is available.
Validation and detection
- Inventory UTT 进取 520W devices and record firmware versions.
- Confirm whether firmware 1.7.7-180627 is present.
- Verify management interfaces are not exposed to the internet.
- Review logs for unusual access to /goform/ConfigExceptMSN.
- Monitor vendor, CVE, and VulDB entries for remediation updates.
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-119: 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 lookupCWE-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-2026-1139 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 (2.0)
- Known Exploited
- No
- Published
Vector: AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR
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.
AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR810Primary CVE scoreVulnerability scoring details
Base CVSS 2.0 score
9CriticalVector: AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR
Source materials
- CVE List V5 sourceCVE List V5
- VDB-341730 | UTT 进取 520W ConfigExceptMSN strcpy buffer overflowCVE reference · vdb-entry, technical-description
- VDB-341730 | CTI Indicators (IOB, IOC, IOA)CVE reference · signature, permissions-required
- Submit #735299 | UTT 进取 520W v3v1.7.7-180627 Buffer OverflowCVE reference · third-party-advisory
- https://github.com/cymiao1978/cve/blob/main/new/34.mdCVE reference · exploit
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 Restriction of Operations within the Bounds of a Memory Buffer
Improper Restriction of Operations within the Bounds of a Memory Buffer represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
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.