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6 vulnerabilities found for Synology SSL VPN Client by Synology
CVE-2021-47961 (GCVE-0-2021-47961)
Vulnerability from nvd – Published: 2026-04-10 09:22 – Updated: 2026-04-10 12:42
VLAI
Summary
A plaintext storage of a password vulnerability in Synology SSL VPN Client before 1.4.5-0684 allows remote attackers to access or influence the user's PIN code due to insecure storage. This may lead to unauthorized VPN configuration and potential interception of subsequent VPN traffic when combined with user interaction.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-256 - Plaintext Storage of a Password
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.synology.com/en-global/security/advis… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Synology | Synology SSL VPN Client |
Affected:
* , < 1.4.5-0684
(semver)
|
Credits
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CVE-2021-47960 (GCVE-0-2021-47960)
Vulnerability from nvd – Published: 2026-04-10 09:21 – Updated: 2026-04-10 12:43
VLAI
Summary
A files or directories accessible to external parties vulnerability in Synology SSL VPN Client before 1.4.5-0684 allows remote attackers to access files within the installation directory via a local HTTP server bound to the loopback interface. By leveraging user interaction with a crafted web page, attackers may retrieve sensitive files such as configuration files, certificates, and logs, leading to information disclosure.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-552 - Files or Directories Accessible to External Parties
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.synology.com/en-global/security/advis… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Synology | Synology SSL VPN Client |
Affected:
* , < 1.4.5-0684
(semver)
|
Credits
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CVE-2023-5748 (GCVE-0-2023-5748)
Vulnerability from nvd – Published: 2023-10-24 10:26 – Updated: 2024-09-17 14:18
VLAI
Summary
Buffer copy without checking size of input ('Classic Buffer Overflow') vulnerability in cgi component in Synology SSL VPN Client before 1.4.7-0687 allows local users to conduct denial-of-service attacks via unspecified vectors.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.synology.com/en-global/security/advis… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Synology | Synology SSL VPN Client |
Affected:
* , < 1.4.7-0687
(semver)
|
Credits
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CVE-2021-47961 (GCVE-0-2021-47961)
Vulnerability from cvelistv5 – Published: 2026-04-10 09:22 – Updated: 2026-04-10 12:42
VLAI
Summary
A plaintext storage of a password vulnerability in Synology SSL VPN Client before 1.4.5-0684 allows remote attackers to access or influence the user's PIN code due to insecure storage. This may lead to unauthorized VPN configuration and potential interception of subsequent VPN traffic when combined with user interaction.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-256 - Plaintext Storage of a Password
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.synology.com/en-global/security/advis… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Synology | Synology SSL VPN Client |
Affected:
* , < 1.4.5-0684
(semver)
|
Credits
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CVE-2021-47960 (GCVE-0-2021-47960)
Vulnerability from cvelistv5 – Published: 2026-04-10 09:21 – Updated: 2026-04-10 12:43
VLAI
Summary
A files or directories accessible to external parties vulnerability in Synology SSL VPN Client before 1.4.5-0684 allows remote attackers to access files within the installation directory via a local HTTP server bound to the loopback interface. By leveraging user interaction with a crafted web page, attackers may retrieve sensitive files such as configuration files, certificates, and logs, leading to information disclosure.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-552 - Files or Directories Accessible to External Parties
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.synology.com/en-global/security/advis… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Synology | Synology SSL VPN Client |
Affected:
* , < 1.4.5-0684
(semver)
|
Credits
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CVE-2023-5748 (GCVE-0-2023-5748)
Vulnerability from cvelistv5 – Published: 2023-10-24 10:26 – Updated: 2024-09-17 14:18
VLAI
Summary
Buffer copy without checking size of input ('Classic Buffer Overflow') vulnerability in cgi component in Synology SSL VPN Client before 1.4.7-0687 allows local users to conduct denial-of-service attacks via unspecified vectors.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.synology.com/en-global/security/advis… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Synology | Synology SSL VPN Client |
Affected:
* , < 1.4.7-0687
(semver)
|
Credits
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