Security readout for executives and security teams
Plain-English summary
CVE-2026-1140 is a critical buffer overflow in UTT 进取 520W firmware 1.7.7-180627. A remote attacker with required authentication may be able to compromise confidentiality, integrity, and availability. Public exploit material is referenced, but the provided sources do not show confirmed active exploitation.
Executive priority
Prioritize identification and isolation of affected devices. The combination of critical impact, remote reachability, and public exploit reference creates material operational risk, even without confirmed active exploitation. If devices support business-critical connectivity, plan controlled maintenance and replacement options if no vendor fix becomes available.
Technical view
The issue affects strcpy handling in /goform/ConfigExceptAli on UTT 进取 520W 1.7.7-180627, causing a buffer overflow classified as CWE-119/CWE-120. CVSS v2 is 9.0 with network access, low complexity, and single authentication. VulDB states vendor contact received no response.
Likely exposure
Exposure is limited to organizations running UTT 进取 520W version 1.7.7-180627, especially if device management interfaces are reachable over untrusted networks. The CVSS vector indicates authentication is required, but risk remains high where credentials are weak, shared, or exposed.
Exploitation context
The vulnerability is remotely reachable and public exploit material is linked in the references. CISA KEV status is not indicated, and the provided sources do not confirm exploitation in the wild. Treat internet-facing or broadly reachable devices as urgent due to critical impact and public proof-of-concept availability.
Researcher notes
Evidence is mainly from CVE/VulDB records and a linked public proof-of-concept reference. No official vendor advisory, patch, or workaround is cited. Avoid assuming other UTT models or firmware versions are affected unless separately confirmed.
Mitigation direction
- Inventory UTT 进取 520W devices and identify firmware version 1.7.7-180627.
- Restrict management interface access to trusted administrative networks only.
- Review vendor or distributor channels for firmware updates or official mitigation guidance.
- Rotate administrative credentials where exposure is possible.
- Monitor device logs and network traffic for suspicious management-interface activity.
Validation and detection
- Confirm model and firmware version on each UTT 进取 520W device.
- Verify /goform/ConfigExceptAli is not reachable from untrusted networks.
- Check firewall, VPN, and ACL controls around device administration interfaces.
- Review authentication logs for unusual or failed access attempts.
- Track CVE and VulDB references for vendor response or updated remediation details.
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-2026-1140 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-341731 | UTT 进取 520W ConfigExceptAli strcpy buffer overflowCVE reference · vdb-entry, technical-description
- VDB-341731 | CTI Indicators (IOB, IOC, IOA)CVE reference · signature, permissions-required
- Submit #735300 | UTT 进取 520W v3v1.7.7-180627 Buffer OverflowCVE reference · third-party-advisory
- https://github.com/cymiao1978/cve/blob/main/new/35.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.