Buffer overflow in Serv-U FTP Voyager
CVE-2018-25252
FTP Voyager 16.2.0 contains a denial of service vulnerability that allows local attackers to crash the application by injecting oversized buffer data into the site profile IP field. Attackers can create a malicious site profile containing 500 bytes of repeated characters and paste it into the IP field to trigger a buffer overflow that crashes the FTP Voyager process.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.003 (20.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 20.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Serv-U FTP Voyager — versions 16.2.0
- Solarwinds FTP Voyager
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/45527 (Exploit, VDB Entry, Third Party Advisory, exploit)
- www.serv-u.com/ (Product, product)
- www.serv-u.com/ftp-voyager (Product, product)
- www.vulncheck.com/advisories/ftp-voyager-denial-of-service-via-malformed-site-p… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2018-25252?
- CVE-2018-25252 is a medium-severity vulnerability in Serv-U FTP Voyager, classified under Out-of-bounds Write. CVSS score: 6.2/10. Published 2026-04-04.
- How severe is CVE-2018-25252?
- Medium severity. CVSS v3 base score is 6.2 out of 10.