Application crash via oversized proxy password
Published Apr 26, 2026 · Updated Apr 26, 2026
Buffer overflow in the PrimeNet connection dialog in Mersenne Research, Inc. Prime95 29.4b7 allows local users to crash the application. The dialog copies an optional proxy password into a fixed-size buffer without enforcing its length, and a 6,000-byte value overruns the destination. Local access to the dialog is required; processing the crafted connection settings terminates Prime95 without reported data disclosure or modification.
Summary
What happened
Buffer overflow in the PrimeNet connection dialog in Mersenne Research, Inc. Prime95 29.4b7 allows local users to crash the application. The dialog copies an optional proxy password into a fixed-size buffer without enforcing its length, and a 6,000-byte value overruns the destination. Local access to the dialog is required; processing the crafted connection settings terminates Prime95 without reported data disclosure or modification.
The record
- CVE
- CVE-2018-25293
- Published
- Apr 26, 2026
- Updated
- Apr 26, 2026
- Vendor
- Mersenne Research, Inc.
- Product
- Prime95
- Classifications
- CWE-120
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 26, 2026CVE publishedPublication date reported by the CVE source.
- Apr 26, 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=29.4b7
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
- Prime95 29.4b7 Proxy Password Denial of Serviceproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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