Security readout for executives and security teams
Plain-English summary
CVE-2026-10191 is a critical buffer overflow in Tenda W12 firmware 3.0.0.7(4763). A remote attacker with required authentication could potentially take full control of the device. Public exploit material is referenced, but the bundle does not show confirmed active exploitation or a vendor patch.
Executive priority
Prioritize discovery and exposure reduction immediately. The affected product is narrow, but the impact is critical and public exploit material exists. Do not wait for confirmed exploitation before limiting access and checking vendor remediation status.
Technical view
The issue affects /bin/httpd, specifically cgiWifiMacFilterSet. Manipulating wifiMacFilterSet.macList.mac can trigger a stack-based buffer overflow, mapped to CWE-119 and CWE-121. CVSS v2 is 9.0 with network access, low complexity, single authentication, and complete confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to Tenda W12 devices running firmware 3.0.0.7(4763), especially where the management interface is reachable over a network. The CVSS vector indicates authentication is required, but compromise could still be severe if credentials are weak, shared, or already exposed.
Exploitation context
The source bundle states the exploit has been publicly disclosed and may be used. KEV is false, and no cited source in the bundle confirms active exploitation in the wild. Treat this as high-risk because public proof-of-concept availability lowers the barrier for follow-on abuse.
Researcher notes
Evidence comes mainly from VulDB and CVE references. The bundle names the vulnerable function, parameter path, affected firmware, and public exploit disclosure, but does not provide vendor-confirmed remediation or in-the-wild exploitation evidence.
Mitigation direction
- Identify Tenda W12 devices and confirm firmware version 3.0.0.7(4763).
- Check Tenda guidance for fixed firmware or official mitigation before applying changes.
- Restrict management access to trusted administrative networks only.
- Disable internet-facing administration where present.
- Use strong unique admin credentials and remove unused accounts.
- Monitor for unexpected configuration changes or management access attempts.
Validation and detection
- Inventory network devices for Tenda W12 model and firmware 3.0.0.7(4763).
- Confirm whether the web management interface is reachable from untrusted networks.
- Review authentication logs for unusual administrative access patterns.
- Check IDS or CTI coverage for the VulDB indicators if available.
- Track CVE and vendor pages for patch or mitigation 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-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-2026-10191 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-367472 | Tenda W12 httpd cgiWifiMacFilterSet stack-based overflowCVE reference, VulDB · vdb-entry, technical-description
- VDB-367472 | CTI Indicators (IOB, IOC, IOA)CVE reference, VulDB · signature, permissions-required
- CVE-2026-10191 | CVE Analysis and ReportCVE reference, VulDB · third-party-advisory
- Submit #820023 | Tenda W12 V3.0.0.7(4763) Stack-based Buffer OverflowCVE reference, VulDB · third-party-advisory
- 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.
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.