A vulnerability was identified in Tenda F1202 1.2.0.20(408). This affects the function fromPptpUserAdd of the file /goform/PptpUserAdd. The manipulation of the argument opttype leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit is publicly available and might be used.
Casky was already ahead
This CVE exploits attack patterns that Casky's 255matched skills already investigate — long before this vulnerability was disclosed. Claude's reasoning model maps these techniques to MITRE ATT&CK, so practitioners who ran these skills have already seen the threat behaviour in their findings.
CVE-2026-9431 is a stack-based buffer overflow vulnerability affecting Tenda F1202 wireless routers running firmware version 1.2.0.20(408). The vulnerability exists in the PPTP user addition function (/goform/PptpUserAdd), where insufficient input validation on the opttype parameter allows attackers to overflow the stack and potentially execute arbitrary code. This is particularly critical because Tenda routers are widely deployed in small office and home office (SOHO) environments, making them attractive targets for botnet recruitment, lateral network movement, and credential harvesting. With a CVSS score of 8.8 and publicly available exploits, this vulnerability represents an immediate threat to thousands of devices lacking prompt patch management.
Casky's 255 mapped skills leverage Claude's extended reasoning to detect exploitation attempts associated with TA0002 (Execution) and TA0003 (Persistence) attack tactics. When analyzing network traffic and device logs, practitioners would identify suspicious patterns including malformed HTTP POST requests to /goform/PptpUserAdd with oversized opttype parameters, stack canary violations, or unexpected process behavior following the attack. The platform's skills enable detection of the initial exploitation phase (TA0002) through abnormal buffer manipulation signatures, and would flag indicators of TA0003 persistence mechanisms—such as new PPTP user accounts, modified system configurations, or scheduled tasks—that attackers establish post-exploitation. By correlating these technique-specific detections across your network infrastructure, Casky helps security teams identify compromise chains before attackers achieve their objectives.
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These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-9431.
Casky has 255 skills that investigate the attack patterns behind CVE-2026-9431. Run one and get CVSS-scored findings in 3 minutes.
Run the skill that detects this →analyzing-browser-forensics-with-hindsight
digital forensics · low
analyzing-cobalt-strike-beacon-configuration
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analyzing-dns-logs-for-exfiltration
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analyzing-linux-system-artifacts
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correlating-security-events-in-qradar
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deobfuscating-javascript-malware
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detecting-container-escape-attempts
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detecting-container-escape-with-falco-rules
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detecting-dcsync-attack-in-active-directory
threat hunting · low
detecting-dll-sideloading-attacks
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detecting-email-forwarding-rules-attack
threat hunting · low
detecting-evasion-techniques-in-endpoint-logs
endpoint security · low
detecting-fileless-attacks-on-endpoints
endpoint security · low
detecting-fileless-malware-techniques
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detecting-kerberoasting-attacks
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detecting-lateral-movement-with-splunk
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detecting-malicious-scheduled-tasks-with-sysmon
threat hunting · low
detecting-mimikatz-execution-patterns
threat hunting · low
detecting-ntlm-relay-with-event-correlation
threat hunting · low
detecting-pass-the-hash-attacks
threat hunting · low
detecting-privilege-escalation-attempts
threat hunting · low
detecting-privilege-escalation-in-kubernetes-pods
container security · low
detecting-process-hollowing-technique
threat hunting · low
detecting-process-injection-techniques
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detecting-rootkit-activity
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threat hunting · low
detecting-t1548-abuse-elevation-control-mechanism
threat hunting · low
detecting-wmi-persistence
threat hunting · low
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red teaming · high
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red teaming · high
exploiting-nopac-cve-2021-42278-42287
red teaming · high
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red teaming · high
extracting-browser-history-artifacts
digital forensics · low
extracting-config-from-agent-tesla-rat
malware analysis · medium
extracting-credentials-from-memory-dump
digital forensics · low
extracting-iocs-from-malware-samples
malware analysis · medium
extracting-windows-event-logs-artifacts
digital forensics · low
hardening-docker-containers-for-production
container security · low
hardening-docker-daemon-configuration
container security · low
hardening-linux-endpoint-with-cis-benchmark
endpoint security · low
hardening-windows-endpoint-with-cis-benchmark
endpoint security · low
hunting-for-anomalous-powershell-execution
threat hunting · low
hunting-for-beaconing-with-frequency-analysis
threat hunting · low
hunting-for-cobalt-strike-beacons
threat hunting · low
hunting-for-command-and-control-beaconing
threat hunting · low
hunting-for-data-exfiltration-indicators
threat hunting · low
hunting-for-data-staging-before-exfiltration
threat hunting · low
hunting-for-dcom-lateral-movement
threat hunting · low
hunting-for-dcsync-attacks
threat hunting · low
hunting-for-defense-evasion-via-timestomping
threat hunting · low
hunting-for-dns-based-persistence
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hunting-for-dns-tunneling-with-zeek
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hunting-for-domain-fronting-c2-traffic
threat hunting · low
hunting-for-lateral-movement-via-wmi
threat hunting · low
hunting-for-living-off-the-cloud-techniques
threat hunting · low
hunting-for-living-off-the-land-binaries
threat hunting · low
hunting-for-lolbins-execution-in-endpoint-logs
threat hunting · low
hunting-for-ntlm-relay-attacks
threat hunting · low
hunting-for-persistence-mechanisms-in-windows
threat hunting · low
hunting-for-persistence-via-wmi-subscriptions
threat hunting · low
hunting-for-process-injection-techniques
threat hunting · low
hunting-for-registry-persistence-mechanisms
threat hunting · low
hunting-for-registry-run-key-persistence
threat hunting · low
hunting-for-scheduled-task-persistence
threat hunting · low
hunting-for-shadow-copy-deletion
threat hunting · low
hunting-for-spearphishing-indicators
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hunting-for-startup-folder-persistence
threat hunting · low
hunting-for-supply-chain-compromise
threat hunting · low
hunting-for-suspicious-scheduled-tasks
threat hunting · low
hunting-for-t1098-account-manipulation
threat hunting · low
hunting-for-unusual-network-connections
threat hunting · low
hunting-for-unusual-service-installations
threat hunting · low
hunting-for-webshell-activity
threat hunting · low
implementing-alert-fatigue-reduction
soc operations · low
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implementing-endpoint-dlp-controls
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implementing-kubernetes-pod-security-standards
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implementing-memory-protection-with-dep-aslr
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implementing-mitre-attack-coverage-mapping
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implementing-network-policies-for-kubernetes
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implementing-opa-gatekeeper-for-policy-enforcement
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implementing-pod-security-admission-controller
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implementing-rbac-hardening-for-kubernetes
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implementing-runtime-security-with-tetragon
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implementing-siem-use-cases-for-detection
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implementing-soar-automation-with-phantom
soc operations · low
implementing-soar-playbook-with-palo-alto-xsoar
soc operations · low
implementing-supply-chain-security-with-in-toto
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implementing-threat-modeling-with-mitre-attack
soc operations · low
implementing-ticketing-system-for-incidents
soc operations · low
implementing-usb-device-control-policy
endpoint security · low
investigating-insider-threat-indicators
soc operations · low
investigating-phishing-email-incident
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investigating-ransomware-attack-artifacts
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performing-active-directory-bloodhound-analysis
red teaming · high
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performing-container-escape-detection
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performing-container-security-scanning-with-trivy
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performing-credential-access-with-lazagne
red teaming · high
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soc operations · low
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container security · low
performing-dynamic-analysis-with-any-run
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performing-endpoint-forensics-investigation
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performing-endpoint-vulnerability-remediation
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performing-initial-access-with-evilginx3
red teaming · high
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performing-iot-security-assessment
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performing-kerberoasting-attack
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performing-kubernetes-cis-benchmark-with-kube-bench
container security · low
performing-kubernetes-etcd-security-assessment
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performing-kubernetes-penetration-testing
container security · low
performing-lateral-movement-detection
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performing-lateral-movement-with-wmiexec
red teaming · high
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performing-log-analysis-for-forensic-investigation
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performing-malware-persistence-investigation
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performing-malware-triage-with-yara
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performing-memory-forensics-with-volatility3
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performing-mobile-device-forensics-with-cellebrite
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performing-network-forensics-with-wireshark
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performing-network-packet-capture-analysis
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performing-threat-hunting-with-yara-rules
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performing-timeline-reconstruction-with-plaso
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performing-vulnerability-scanning-with-nessus
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malware analysis · medium
recovering-deleted-files-with-photorec
digital forensics · low
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reverse-engineering-dotnet-malware-with-dnspy
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reverse-engineering-malware-with-ghidra
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reverse-engineering-ransomware-encryption-routine
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scanning-container-images-with-grype
container security · low
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container security · low
scanning-kubernetes-manifests-with-kubesec
container security · low
securing-container-registry-with-harbor
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securing-helm-chart-deployments
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triaging-security-alerts-in-splunk
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