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CVE-2018-6916

30
FAUCET Score

CVE-2018-6916 is a critical vulnerability affecting FreeBSD versions before 11.1-STABLE, 11.1-RELEASE-p7, 10.4-STABLE, 10.4-RELEASE-p7, and 10.3-RELEASE-p28. It involves improper validation of IPsec packets from trusted hosts and a use-after-free flaw in the IPsec AH handling code. With a CVSS score of 9.8 (CRITICAL), this network-exploitable vulnerability requires no user interaction and could lead to a complete compromise of confidentiality, integrity, and availability, including system crashes. Despite its severity, there is no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 11.0, < 11.1CPE matchmatch criteria
cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
10.3CPE matchmatch criteria
cpe:2.3:o:freebsd:freebsd:10.3:p28:*:*:*:*:*:*
10.4CPE matchmatch criteria
cpe:2.3:o:freebsd:freebsd:10.4:*:*:*:*:*:*:*
10.4CPE matchmatch criteria
cpe:2.3:o:freebsd:freebsd:10.4:p7:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.13%
Probability of exploitation in next 30 days
EPSS Percentile
80.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0213 is in the 69th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

freebsd.org / security/advisories/FreeBSD-SA-18:01.ipsec.asc
PatchVendor Advisory
securitytracker.com / id/1040460
Third Party AdvisoryVDB Entry