Security readout for executives and security teams
Plain-English summary
CVE-2026-3273 is a critical buffer overflow in Tenda F453 firmware 1.0.0.3. A remote attacker with required access could potentially compromise the router through its web management service. Public exploit material is referenced, but the sources do not show confirmed active exploitation.
Executive priority
Treat as urgent for environments using Tenda F453 routers. Prioritize reducing management-interface exposure immediately, then confirm vendor remediation. Business risk is highest for small offices, branches, or unmanaged networks where routers are internet-accessible.
Technical view
The issue affects httpd in /goform/AdvSetWrlsafeset, specifically function formWrlsafeset. Manipulation of the mit_ssid_index argument can trigger a buffer overflow. The CVSS v2 vector indicates network access, low complexity, single authentication, and complete confidentiality, integrity, and availability impact.
Likely exposure
Organizations using Tenda F453 devices running firmware 1.0.0.3 are potentially exposed, especially if the web administration interface is reachable from untrusted networks. Exposure is lower where management access is restricted and strong authentication is enforced.
Exploitation context
VulDB states remote exploitation is possible and that exploit code is publicly available. The CVSS vector indicates authentication is required. The provided sources do not include CISA KEV listing or other evidence of active exploitation in the wild.
Researcher notes
Evidence is primarily from VulDB and the linked public repository. The record names CWE-119 and CWE-120. No vendor patch details are provided in the source bundle. Avoid assuming unauthenticated exploitation; the supplied CVSS vector lists Au:S.
Mitigation direction
- Identify Tenda F453 devices and firmware versions in the environment.
- Restrict router web management access to trusted administrative networks only.
- Disable internet-facing management interfaces where possible.
- Check Tenda guidance for firmware updates or official remediation.
- Replace unsupported or unpatchable affected devices if no fix is available.
- Monitor logs for unusual authenticated changes to wireless safety settings.
Validation and detection
- Inventory devices for Tenda F453 firmware version 1.0.0.3.
- Confirm whether httpd web management is reachable from untrusted networks.
- Review access controls for router administration interfaces.
- Check vendor resources for an updated advisory or firmware release.
- Assess whether public exploit indicators from VulDB apply to monitoring.
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-2026-3273 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-347997 | Tenda F453 httpd AdvSetWrlsafeset formWrlsafeset buffer overflowCVE reference · vdb-entry, technical-description
- VDB-347997 | CTI Indicators (IOB, IOC, IOA)CVE reference · signature, permissions-required
- Submit #759606 | Tenda F453 v1.0.0.3 Buffer Access Using Size of Source BufferCVE reference · third-party-advisory
- https://github.com/Litengzheng/vul_db/blob/main/F453/vul_73/README.mdCVE reference · exploit
- https://www.tenda.com.cn/CVE reference · 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.