Local code execution via Register buffer overflow
Published Jan 30, 2026 · Updated Jan 30, 2026
Buffer overflow in the Register feature of Port Forwarding Wizard 4.8.0 allows local users to execute arbitrary code on Windows. The feature copies an overlong request without checking its size, allowing an egg-tag payload to overwrite the SEH chain and redirect execution to shellcode. Exploitation requires local access to submit the crafted request through the Register feature; successful SEH control executes code in the application's security context.
Summary
What happened
Buffer overflow in the Register feature of Port Forwarding Wizard 4.8.0 allows local users to execute arbitrary code on Windows. The feature copies an overlong request without checking its size, allowing an egg-tag payload to overwrite the SEH chain and redirect execution to shellcode. Exploitation requires local access to submit the crafted request through the Register feature; successful SEH control executes code in the application's security context.
The record
- CVE
- CVE-2020-37025
- Published
- Jan 30, 2026
- Updated
- Jan 30, 2026
- Vendor
- iForwarder and upRedSun Technologies, LLC.
- Product
- Port Forwarding Wizard
- Classifications
- CWE-120, T1203
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 30, 2026CVE publishedPublication date reported by the CVE source.
- Jan 30, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=4.8.0
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Port Forwarding Wizard 4.8.0 Buffer Overflow (SEH)functional · validated
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Technologies
Your stack
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Your stack
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