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CVE-2018-8929

24
FAUCET Score

CVE-2018-8929 describes an improper restriction of communication channel vulnerability in the HTTP daemon of Synology SSL VPN Client versions prior to 1.2.4-0224, allowing remote attackers to perform man-in-the-middle (MitM) attacks through crafted payloads. This vulnerability is rated as HIGH severity (CVSS 8.1), indicating a high potential for impact on confidentiality, integrity, and availability, with a network attack vector and high attack complexity. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage for this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.2.4-0224CPE matchmatch criteria
cpe:2.3:a:synology:ssl_vpn_client:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.3HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
3.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.75%
Probability of exploitation in next 30 days
EPSS Percentile
51.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0075 is in the 20th percentile among its peer group of 8,914 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

synology.com / en-global/support/security/Synology_SA_18_19
Vendor Advisory