Security readout for executives and security teams
Plain-English summary
CVE-2026-3271 is a critical buffer overflow in Tenda F453 firmware 1.0.0.3. A remote attacker with required access to the affected web interface could potentially gain full control of the device. Public proof-of-concept material is referenced, but CISA KEV is not indicated in the provided sources.
Executive priority
Prioritize discovery and isolation this week if Tenda F453 devices are used. The risk is highest for devices reachable from untrusted networks. Because no vendor fix is identified in the provided sources, risk reduction may require access restrictions or replacement planning.
Technical view
The issue affects Tenda F453 httpd, specifically fromP2pListFilter in /goform/P2pListFilterof. Manipulating the page argument can trigger a buffer overflow, mapped to CWE-119 and CWE-120. The provided CVSS v2 vector is 9.0: AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR.
Likely exposure
Exposure is limited to Tenda F453 devices running firmware 1.0.0.3, especially where the httpd management interface is reachable by untrusted networks. The CVSS vector indicates network reachability and required authentication, but the source bundle does not clarify default exposure conditions.
Exploitation context
The source bundle states the exploit has been made public and could be used. It does not show CISA KEV listing or confirmed active exploitation. Treat reachable affected devices as high-risk because routers are often internet-adjacent and difficult to monitor.
Researcher notes
Key unknowns include vendor patch status, authentication details, and real-world exploitation. Public PoC material is referenced, so avoid assuming obscurity. Validate only in authorized lab environments and focus on asset exposure, firmware confirmation, and vendor remediation tracking.
Mitigation direction
- Identify any Tenda F453 devices and confirm firmware version 1.0.0.3 exposure.
- Check Tenda guidance for firmware updates, advisories, or replacement recommendations.
- Restrict management interface access to trusted administrative networks only.
- Disable remote administration if not required by business operations.
- Consider replacing unsupported or unpatched affected devices.
Validation and detection
- Inventory network devices for Tenda F453 model identifiers.
- Verify firmware version through approved administrative interfaces.
- Review whether httpd management is reachable from WAN or untrusted segments.
- Check logs for unusual administrative access where logging exists.
- Track vendor and CVE sources for updated remediation information.
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-2026-3271 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-347995 | Tenda F453 httpd P2pListFilterof fromP2pListFilter buffer overflowCVE reference · vdb-entry, technical-description
- VDB-347995 | CTI Indicators (IOB, IOC, IOA)CVE reference · signature, permissions-required
- Submit #759601 | 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_70/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.
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.