An issue was discovered in the web server in Flexense SyncBreeze Enterprise 10.6.24.

published 2018-03-12 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-19747

cvss: 7.5; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 75.9%; EPSS 75.9% chance of exploitation in 30 days, percentile 99.5%
public exploits: 2; Metasploit, Exploit-DB

An issue was discovered in the web server in Flexense SyncBreeze Enterprise 10.6.24. There is a user mode write access violation on the syncbrs.exe memory region that can be triggered by rapidly sending a variety of HTTP requests with long HTTP header values or long URIs.

Patch / fix

links 1

github.com/rapid7/metasploit-framework#9701 pull request

Timeline

2018-03-09 First public exploit (Metasploit auxiliary/dos/http/flexense_http_server_dos)
2018-03-12 Published

Exploit prediction

75.88% chance of exploitation in the next 30 days, higher than 99.5% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

Metasploit auxiliary/dos/http/flexense_http_server_dos Flexense HTTP Server Denial Of Service metasploit auxiliary, normal rank, 2018-03-09
EDB-51493 Flexense HTTP Server 10.6.24 - Buffer Overflow (DoS) (Metasploit) remote, 2023-05-31

CVSS scores

assigned by	version	score	vector
NVD	3.0	7.5	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness

CWE-20 Improper Input Validation

References

github.com /rapid7/metasploit-framework/pull/9701
issue-tracking, third-party-advisory
github.com /EgeBalci/Sync_Breeze_Enterprise_10_6_24_-DOS
third-party-advisory
packetstormsecurity.com /files/172676/Flexense-HTTP-Server-10.6.24-Buffer-Overflow-Denial-Of-Service.html

Sources

CVE List CVE-2018-8065
NVD CVE-2018-8065

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary