Analyst readout for executives and security teams
Plain-English summary
CVE-2026-9430 is a critical flaw in Tenda F1202 firmware 1.2.0.20(408). A remote, likely authenticated attacker could trigger a memory corruption bug that may compromise the device. Public exploit information is referenced, but the provided sources do not show known active exploitation or a named vendor patch.
Executive priority
Treat this as urgent for any exposed Tenda F1202 device. The flaw is critical, remotely reachable, and has public exploit material, but evidence provided does not show active exploitation or a vendor-confirmed fix.
Technical view
The issue is a stack-based buffer overflow in formGstDhcpSetSer within /goform/GstDhcpSetSerof. Manipulating the dips argument can overflow stack memory. The CVSS v2 vector is AV:N/AC:L/Au:S/C:C/I:C/A:C, indicating network reachability, low complexity, required authentication, and full confidentiality, integrity, and availability impact.
Likely exposure
Exposure appears limited to Tenda F1202 devices running firmware 1.2.0.20(408), especially where the web management interface is reachable from untrusted networks. The sources do not establish impact to other Tenda models or firmware versions.
Exploitation context
VulDB states the exploit has been publicly disclosed and may be used, and the source bundle includes a GitHub reference tagged as exploit. CISA KEV status is false, and no cited source confirms active exploitation in the wild.
Researcher notes
Key uncertainty is remediation status. The source bundle identifies the vulnerable function, endpoint path, parameter, firmware version, and weakness classes CWE-119/CWE-121, but does not provide vendor advisory details, patch version, or confirmed exploitation telemetry.
Mitigation direction
- Check Tenda guidance and firmware downloads for a fixed release; sources do not name a patch.
- Restrict F1202 management access to trusted administrative networks only.
- Remove internet exposure for affected device administration interfaces.
- Monitor using VulDB CTI indicators where available.
- Replace or isolate affected devices if no supported fixed firmware exists.
Validation and detection
- Inventory Tenda F1202 devices and record firmware versions.
- Confirm whether firmware 1.2.0.20(408) is present.
- Review exposure of the web management interface to untrusted networks.
- Check logs and network telemetry against published CTI indicators.
- Track CVE, VulDB, and Tenda pages for updated remediation guidance.
Public sources used
Based on public source material and reviewed before publication.
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-2026-9430 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
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:UR 8 10 VulDB 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 2.8 5.9 VulDB 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 2.8 5.9 VulDB 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 — — VulDB Vulnerability scoring details
Base CVSS 4.0 score
8.7 HighVector: 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
8.8 HighVector: 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
8.8 HighVector: 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
9 CriticalVector: 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 timeline VulDB
Advisory disclosed
- Source timeline VulDB
VulDB entry created
- CVE reserved CVE Program
The CVE ID was reserved by the assigning CNA.
- Source timeline VulDB
VulDB entry last update
- CVE published CVE Program
The CVE record was published.
- CVE updated CVE Program
The CVE record metadata indicates this as the latest update time.
Source materials
- CVE List V5 source CVE List V5
- VDB-365411 | Tenda F1202 GstDhcpSetSerof formGstDhcpSetSer stack-based overflow CVE reference, VulDB · vdb-entry, technical-description
- VDB-365411 | CTI Indicators (IOB, IOC, IOA) CVE reference, VulDB · signature, permissions-required
- Submit #813915 | Tenda F1202 V1.2.0.20(408) Stack-based Buffer Overflow CVE reference, VulDB · third-party-advisory
- https://github.com/Litengzheng/vuldb_new2/blob/main/F1202/vul_32/README.md CVE 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.
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.