PatchTheCVECVE-2019-25321: FTP Navigator 8.03 contains a stack overflow vulnerability that allows attackers to execute arbitrary code by
CVE-2019-25321 is a critical-severity flaw (CVSS 9.8) affecting ftp navigator. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
FTP Navigator 8.03 contains a stack overflow vulnerability that allows attackers to execute arbitrary code by overwriting Structured Exception Handler (SEH) registers. Attackers can craft a malicious payload that triggers a buffer overflow when pasted into the Custom Command textbox, enabling remote code execution and launching the calculator as proof of concept.
Why this priority
- Critical severity
- Public exploit reference
- CISA SSVC: automatable with total technical impact
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.8 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.8% (top 44%) |
| CISA exploited list | No |
| Weakness | CWE-121 |
| Published | 2026-02-12 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Exact fixes by distribution
Public exploits and detection
Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.
- Write-up: www.exploit-db.com/exploits/47794
- Write-up: www.exploit-db.com/exploits/47812
- Write-up: www.vulncheck.com/advisories/ftp-navigator-stack-overflow-seh
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2019-25321?
ftp navigator: upgrade to newer than 8.03. Exact commands for each OS are on this page.
Is CVE-2019-25321 being exploited?
CVE-2019-25321 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2019-25321 affect?
CVE-2019-25321 affects ftp navigator. Severity is critical (CVSS 9.8). FTP Navigator 8.03 contains a stack overflow vulnerability that allows attackers to execute arbitrary code by overwriting Structured Exception Handler (SEH) registers. Attackers can craft a malicious payload that triggers a buffer overflow
How urgent is CVE-2019-25321?
Priority 61/100. Critical severity; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action
Related CVEs
- CVE-2019-25329 HIGH 7.5 UPGRADE FTP Navigator 8.03 contains a denial of service vulnerability that allows attackers to crash the application b