HOMEVULNERABILITIESCVE-2019-11868
HIGH

CVE-2019-11868

CWE-787Published: July 29, 2019· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official Description

See.sys, up to version 4.25, in SoftEther VPN Server versions 4.29 or older, allows a user to call an IOCTL specifying any kernel address to which arbitrary bytes are written to.

NVD Source

Technical Analysis

CVE-2019-11868 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

softether1 product(s)
see.sys
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://downwithup.github.io/CVEPosts
ADVISORYhttps://github.com/SoftEtherVPN/SoftEtherVPN/tree/master/src/See
ADVISORYhttps://www.softether.org/9-about/News/900-SEVPN201901
ADVISORYhttps://downwithup.github.io/CVEPosts
ADVISORYhttps://github.com/SoftEtherVPN/SoftEtherVPN/tree/master/src/See
ADVISORYhttps://www.softether.org/9-about/News/900-SEVPN201901

All References (6)

→
https://downwithup.github.io/CVEPostsThird Party Advisory
→
https://github.com/SoftEtherVPN/SoftEtherVPN/tree/master/src/SeeThird Party Advisory
→
https://www.softether.org/9-about/News/900-SEVPN201901Vendor Advisory
→
https://downwithup.github.io/CVEPostsThird Party Advisory
→
https://github.com/SoftEtherVPN/SoftEtherVPN/tree/master/src/SeeThird Party Advisory
→
https://www.softether.org/9-about/News/900-SEVPN201901Vendor Advisory

Quick Facts

CVE IDCVE-2019-11868
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-787
CISA KEVNo
Affected1 vendor(s)
PublishedJul 29, 2019

Related CVEs (CWE-787)

CVE-2009-2466
10.0
CVE-2004-0978
10.0
CVE-2018-6692
10.0
CVE-2011-1807
10.0
CVE-2015-5098
10.0
CVE-2018-2913
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-11868 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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