Security readout for executives and security teams
Plain-English summary
A remotely reachable flaw in the Tenda HG10 wireless configuration interface can corrupt device memory when processing the SSID field. A public proof of concept exists. The supplied evidence most directly demonstrates denial of service; it does not establish active exploitation or confirmed code execution.
Executive priority
Prioritize immediate exposure reduction and vendor follow-up. Public proof-of-concept availability, remote reachability, and critical scoring justify urgent action for affected devices. Do not assume compromise solely from this disclosure; investigate suspicious restarts or configuration activity and plan isolation or replacement if no supported fix exists.
Technical view
CVE-2026-85110 affects formWlanSetup at /boaform/formWlanSetup in Tenda HG10 version 300001138. Manipulating the ssid argument triggers a CWE-119/CWE-120 buffer overflow. The CVSS 2.0 vector indicates network access, low complexity, and single authentication. Its impact rating is broad, although the submitted evidence specifically identifies denial of service.
Likely exposure
Exposure is likely where Tenda HG10 devices running version 300001138 permit untrusted users to reach the Boa management interface. Authentication appears required. Internet-facing or broadly reachable administration significantly increases risk; the bundle provides no deployment prevalence data.
Exploitation context
A public proof of concept is referenced, making reproduction more accessible. The source bundle says remote exploitation is possible, but KEV is false and no cited evidence confirms exploitation in the wild. Treat public exploit availability as elevated risk, not proof of active attacks.
Researcher notes
The evidence identifies an ssid-triggered buffer overflow in a specific Boa handler. CVSS claims complete confidentiality, integrity, and availability impact, but the referenced submission describes denial of service. Authentication is indicated by Au:S and the CTI reference tag. No vendor advisory, fixed release, or reliable in-the-wild exploitation evidence is supplied.
Mitigation direction
- Identify and restrict HG10 management access to trusted administrative networks.
- Prevent internet access to the Boa administration interface.
- Check Tenda guidance for patched firmware or vendor-approved mitigation.
- Use strong, unique administrator credentials while authentication remains a required control.
- Replace or isolate affected devices if no supported remediation is available.
Validation and detection
- Inventory Tenda HG10 devices and confirm their installed firmware versions.
- Verify whether /boaform/formWlanSetup is reachable from untrusted networks without sending malicious input.
- Confirm management access requires authentication and is limited to authorized administrators.
- Review device logs for unexpected restarts, configuration changes, or suspicious management access.
- Recheck Tenda guidance and the CVE record 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-2026-85110 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-398316 | Tenda HG10 Boa Web Server formWlanSetup buffer overflowCVE reference, VulDB · vdb-entry, technical-description
- VDB-398316 | CTI Indicators (IOB, IOC, IOA)CVE reference, VulDB · signature, permissions-required
- CVE-2026-85110 | CVE Analysis and ReportCVE reference, VulDB · third-party-advisory
- Submit #891995 | Tenda HG10 HG7_HG9_HG10re_300001138 Denial of ServiceCVE reference, VulDB · third-party-advisory
- https://github.com/SunnyYANGyaya/cuicuishark-sheep-fishIOT/blob/main/Tenda/HG10/bof-formWlanSetup-ssid.mdCVE reference, VulDB · exploit
- https://www.tenda.com.cn/CVE reference, VulDB · product
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.