CVE-2018-0681
(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 login to the Management page and 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 login to the Management page and 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.