What’s Vulnerable › Vulnerabilities

CVE-2018-0683

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-11-15 · updated 2026-06-17
• Weakness: CWE-119

Description

Buffer overflow in Denbun by NEOJAPAN Inc. (Denbun POP version V3.3P R4.0 and earlier, Denbun IMAP version V3.3I R4.0 and earlier) allows remote attackers to execute arbitrary code or cause a denial-of-service (DoS) condition via Cookie data.

Affected products

• Neo Debun Imap: through 3.3i_r4.0
• NEOJAPAN Inc. Denbun POP version V3.3P R4.0 and earlier: through 3.3p_r4.0

References

• http://jvn.jp/en/jp/JVN00344155/index.html
• https://www.denbun.com/en/imap/support/security/181003.html
• https://www.denbun.com/en/pop/support/security/181003.html
• http://jvn.jp/en/jp/JVN00344155/index.html
• https://www.denbun.com/en/imap/support/security/181003.html
• https://www.denbun.com/en/pop/support/security/181003.html

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