Security readout for executives and security teams
Plain-English summary
Prime95 29.4b8 has a local memory corruption flaw that can allow arbitrary code execution through the PrimeNet proxy hostname setting. This is not described as a remote internet attack, but a compromised or malicious local user/process could use it to take over the application context.
Executive priority
Treat as a targeted endpoint risk, not an emergency internet-facing exposure. Prioritize environments where Prime95 is installed on shared, high-value, or research systems.
Technical view
The issue is a CWE-120 buffer overflow in Prime95 29.4b8 involving structured exception handling. The CVE assigns CVSS 4.0 score 8.6 with local attack vector. Public ExploitDB material exists, but the provided sources do not show CISA KEV listing or confirmed in-the-wild exploitation.
Likely exposure
Exposure appears limited to systems running Prime95 29.4b8. Risk is most relevant on workstations, lab machines, or compute systems where Prime95 is installed and local configuration can be influenced.
Exploitation context
The attack is local per CVSS. Sources describe malicious input through the optional proxy hostname field in PrimeNet connection settings. Public exploit information is referenced, but no cited source confirms active exploitation.
Researcher notes
Evidence supports affected product/version and exploit availability, but remediation details are not named in the provided sources. Avoid assuming other Prime95 versions are affected without vendor or advisory confirmation.
Mitigation direction
- Identify and remove Prime95 29.4b8 where it is not business-required.
- Check Mersenne guidance and downloads for a safer current release.
- Restrict who can modify Prime95 configuration on shared systems.
- Monitor endpoints running Prime95 for unusual process behavior.
Validation and detection
- Check software inventory for Prime95 version 29.4b8.
- Confirm whether Prime95 is installed on managed endpoints or compute hosts.
- Review whether PrimeNet proxy settings are configured or user-writable.
- Document remediation status against affected installations.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-120: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2018-25299 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.6 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
8.6HighVector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-44649CVE reference · exploit
- Official Product HomepageCVE reference · product
- Product ReferenceCVE reference · product
- VulnCheck Advisory: Prime95 29.4b8 Local Buffer Overflow via SEHCVE reference · third-party-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.