EUVD-2026-31633
GHSA-rf9r-xx56-f4rm
Severity by source
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
2DescriptionCVE.org
A vulnerability was determined in Tenda F1202 1.2.0.20(408). Affected by this issue is the function formGstDhcpSetSer of the file /goform/GstDhcpSetSerof. Executing a manipulation of the argument dips can lead to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been publicly disclosed and may be utilized.
AnalysisAI
Stack-based buffer overflow in the Tenda F1202 router (firmware 1.2.0.20(408)) allows remote attackers to corrupt memory by sending a crafted 'dips' parameter to the formGstDhcpSetSer handler at /goform/GstDhcpSetSer. Publicly available exploit code exists (published via VulDB/GitHub), though EPSS rates real-world exploitation probability very low at 0.05%, and the issue is not listed in CISA KEV.
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires network reachability to the F1202's HTTP management interface (typically TCP/80 on the LAN, or WAN if remote management is enabled) and low-privilege authenticated access to that interface (CVSS PR:L), meaning the attacker must possess valid - even unprivileged - admin-panel credentials before triggering the formGstDhcpSetSer handler at /goform/GstDhcpSetSer with a manipulated 'dips' argument. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H, E:P) produces a 7.4 base score reflecting network reach, low complexity, and high impact across confidentiality, integrity, and availability - but importantly PR:L indicates the attacker must hold at least low-level privileges (likely an authenticated session to the router admin interface). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has obtained low-privilege credentials to the F1202 web interface (e.g., via phishing, default credentials, or LAN foothold) sends a crafted HTTP POST to /goform/GstDhcpSetSer with an oversized 'dips' parameter, overflowing the stack buffer in formGstDhcpSetSer and overwriting the saved return address to redirect execution to attacker-controlled shellcode. Publicly available exploit code on GitHub (Litengzheng/vuldb_new2) lowers the barrier significantly, enabling reliable crash-to-code-execution and ultimately full router takeover for pivoting, traffic interception, or DNS hijacking. |
| Remediation | No vendor-released patch identified at time of analysis - Tenda has not published a fixed firmware build in the referenced advisories (VulDB 365411 and NVD), so administrators should monitor https://www.tenda.com.cn/ for an updated firmware release for the F1202. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
24 HOURS: Inventory all Tenda F1202 routers; identify firmware version 1.2.0.20(408); isolate or disconnect affected units from critical network segments. …
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External POC / Exploit Code
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