CVE-2018-0680
(Denbun POP version V3.3P R4.0 and earlier, Denbun IMAP version V3.3I R4.0 and earlier) uses hard-coded credentials, which may allow remote attackers to read/send mail or change the configuration.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.67%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Denbun by NEOJAPAN Inc. (Denbun POP version V3.3P R4.0 and earlier, Denbun IMAP version V3.3I R4.0 and earlier) uses hard-coded credentials, which may allow remote attackers to read/send mail or change the configuration.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.67% probability · 77th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-798
- Affected
- neo/debun imap · neo/debun pop
- Source
- vultures@jpcert.or.jp
EPSS 1.7% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://jvn.jp/en/jp/JVN00344155/index.htmlThird Party Advisory
- https://www.denbun.com/en/imap/support/security/181003.htmlVendor Advisory
- https://www.denbun.com/en/pop/support/security/181003.htmlVendor Advisory
- http://jvn.jp/en/jp/JVN00344155/index.htmlThird Party Advisory
- https://www.denbun.com/en/imap/support/security/181003.htmlVendor Advisory
- https://www.denbun.com/en/pop/support/security/181003.htmlVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.