Security readout for executives and security teams
Plain-English summary
A remotely reachable flaw in the UTT HiPER 1250GW can corrupt memory when a crafted cipher value reaches its 5 GHz security configuration handler. Successful exploitation could compromise confidentiality, integrity, and availability. The reported CVSS v2 score is 9.0, and public proof-of-concept material exists.
Executive priority
Treat as an urgent gateway-management risk. Inventory affected devices immediately, remove untrusted management exposure, and pursue vendor-supported remediation or replacement. Public proof-of-concept availability raises urgency, although active exploitation is not established by the supplied evidence.
Technical view
CVE-2026-18895 is a stack-based buffer overflow in strcpy within /goform/APSecurity_5g. Manipulating the cipher argument can exceed the destination buffer. The supplied CVSS v2 vector indicates network access, low complexity, and single authentication. UTT HiPER 1250GW firmware through 3.2.7-210907-180535 is reported affected.
Likely exposure
Highest risk applies to affected gateways whose management interface is reachable from untrusted networks or compromised internal accounts. The supplied evidence indicates authentication is required. Actual exposure depends on deployed firmware, interface reachability, access controls, and whether the vulnerable handler is enabled.
Exploitation context
Public exploit material is referenced, increasing near-term misuse risk. However, the supplied sources do not establish observed attacks, and the CVE is not listed as CISA KEV. Treat exploitation as technically plausible and publicly documented, not confirmed active exploitation.
Researcher notes
The record maps the issue to CWE-119 and CWE-121. Evidence identifies the vulnerable handler, function, and cipher parameter but provides no vendor confirmation, patched version, or official mitigation. UTT reportedly did not respond to disclosure. Avoid equating public proof-of-concept availability with confirmed exploitation in the wild.
Mitigation direction
- Identify and prioritize UTT HiPER 1250GW devices running the reported firmware.
- Block internet access to management interfaces and restrict administration to trusted networks.
- Apply strict network segmentation and allowlist authorized management hosts.
- Check UTT guidance for fixed firmware or an approved workaround.
- If no fix exists, consider replacing exposed or business-critical devices.
Validation and detection
- Confirm model and installed firmware using trusted inventory or administrative records.
- Verify management interfaces are unreachable from the internet and untrusted network segments.
- Review access controls for accounts permitted to modify 5 GHz security settings.
- Inspect logs for unusual configuration requests, crashes, restarts, or unexplained changes.
- After remediation, revalidate firmware versions and management-interface restrictions.
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-121: 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-2026-18895 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.
SSVC decision data
CVSS vector scores
4 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.
AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR810VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R2.85.9VulDBCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R2.85.9VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P——VulDBVulnerability scoring details
Base CVSS 4.0 score
8.7HighVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
Base CVSS 3.0 score
8.8HighVector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
Base CVSS 2.0 score
9CriticalVector: AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- Source timelineVulDB
Advisory disclosed
- Source timelineVulDB
VulDB entry created
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- Source timelineVulDB
VulDB entry last update
- 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
- VDB-385930 | UTT HiPER 1250GW APSecurity_5g strcpy stack-based overflowCVE reference, VulDB · vdb-entry, technical-description
- VDB-385930 | CTI Indicators (IOB, IOC, IOA)CVE reference, VulDB · signature, permissions-required
- CVE-2026-18895 | CVE Analysis and ReportCVE reference, VulDB · third-party-advisory
- Submit #858607 | UTT HiPER 1250GW <=v3.2.7-210907-180535 Buffer OverflowCVE reference, VulDB · third-party-advisory
- https://github.com/7wkajk/CVE-VUL/blob/main/101.mdCVE reference, VulDB · 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.
Stack-based Buffer Overflow
Stack-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.