CVE-2023-32634
Softether Vpn 4.41-9782 … 5.01.9674
Raw vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2023-32634 is a high-severity Channel Accessible by Non-Endpoint (CWE-300) vulnerability in Softether Vpn. Its CVSS base score is 7.8 (High).
Operationally, ranked at the 35th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-36877
Vulnerability Data
An authentication bypass vulnerability exists in the CiRpcServerThread() functionality of SoftEther VPN 5.01.9674 and 4.41-9782-beta. An attacker can perform a local man-in-the-middle attack to trigger this vulnerability.
- CWE(s)
Related Threats
CVEs Like This One
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Ensures only authenticated endpoints can access the communication channel, blocking unauthorized non-endpoint access.
Physically restricts transmission channels so they cannot be accessed or tapped by non-endpoint actors within facilities.
Periodic TSCM surveys identify unauthorized access points or taps that make communication channels reachable by non-endpoint adversaries.
Explicitly isolates the communications path so it cannot be accessed or intercepted by non-endpoint entities during security functions.
Restrictions and channel controls reduce the chance that VoIP media or signaling streams remain accessible to non-participants.
Directly prevents non-endpoint access or interception of the session communication path.
An out-of-band channel is inaccessible to non-endpoints that can observe or interfere with the primary communication channel.
The control restricts an inherently broadcast wireless channel to only intended endpoints, mitigating accessibility by non-endpoints.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
A.5.14 mandates rules/procedures/agreements (incl. recipient auth, crypto per 8.24, stronger auth on public nets, anti-interception/unauth-access controls) that stop non-endpoint actors from accessing/influencing the channel for most transfer forms; remainder (e.g. some verbal transfer, misrouting not caught by auth) is nameable.
Network security controls directly address channel integrity and endpoint authentication.
Security of network services includes measures to verify endpoints and protect channel integrity.
Cryptography provides channel integrity and can support endpoint authentication.
Secure authentication mechanisms verify actor identity at both ends of the channel.
Hardening callouts derived
DISA STIG baselines are authored against specific weaknesses. Where this CVE cites a broad weakness class, the mapping is not asserted at that abstraction (owner ruling, 2026-09-25: grade only at Base and below), so no rule is shown here rather than a rule shown against the wrong grain.
- No fine-grained STIG row for CWE-300, a class-level weakness, and none of its children carries one either.