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CVE-2022-43931

32
FAUCET Score

CVE-2022-43931 is a critical out-of-bounds write vulnerability in the Remote Desktop Functionality of Synology VPN Plus Server, affecting versions prior to 1.4.3-0534 and 1.4.4-0635. This flaw allows unauthenticated remote attackers to execute arbitrary commands with maximum impact on confidentiality, integrity, and availability. With a CVSS score of 10.0, it represents a severe risk. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion and media coverage, indicating high awareness. Synology has released patches to address this critical issue.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.4.3-0534CPE matchmatch criteria
cpe:2.3:a:synology:vpn_plus_server:*:*:*:*:*:*:*:*
< 1.4.4-0635CPE matchmatch criteria
cpe:2.3:a:synology:vpn_plus_server:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

10.0CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
16.84%
Probability of exploitation in next 30 days
EPSS Percentile
96.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.1684 is in the 93rd percentile among its peer group of 36,862 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

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

synology.com / en-global/security/advisory/Synology_SA_22_26
Vendor Advisory