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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "1.0.0.3"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "F453", "source": "cna", "vendor": "Tenda"}, "product": "f453", "vendor": "tenda"}], "analysis": {"en": {"generated_at": "2026-03-29T05:21:22.890810+00:00", "value": {"mitigation_remediation": ["Upgrade the Tenda F453 to the latest firmware release that contains a fix for the stack-based buffer overflow in the PPTPUserSetting endpoint.", "If a firmware upgrade cannot be performed immediately, block or limit external access to the /goform/PPTPUserSetting page using firewall rules or access\u2011control lists to prevent unauthenticated exploitation.", "After applying the update or restriction, verify successful remediation by confirming the removal of the vulnerable endpoint or by testing with the known exploit to ensure it no longer succeeds."], "summary": {"action": "Patch Immediately", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "Affects only the Tenda F453 router running firmware 1.0.0.3. No other product variants are listed as affected.", "description_and_impact": "The vulnerability resides in the Tenda F453 firmware version 1.0.0.3, specifically within the httpd component\u2019s fromPPTPUserSetting function in /goform/PPTPUserSetting. A crafted value for the delno argument triggers a stack-based buffer overflow, allowing an attacker to overwrite the return address and execute arbitrary code. This flaw can be exploited remotely without authentication, leading to full control over the device.", "risk_and_exploitability": "The CVSS score of 8.7 indicates a high severity, and published exploits confirm the vulnerability can be abused from outside the network. No EPSS score is available, and the flaw is not currently listed in the CISA KEV catalog, but the lack of authentication requirement and remote reach make it a significant risk."}}}}, "created": "2026-03-29T20:31:51.355102+00:00", "updated": "2026-03-30T06:58:43.706078+00:00", "vendors": ["tenda", "tenda$PRODUCT$f453"]}