CVE-2017-6720
A vulnerability in the Secure Shell (SSH) subsystem of Cisco Small Business Managed Switches...
A vulnerability in the Secure Shell (SSH) subsystem of Cisco Small Business Managed Switches software could allow an authenticated, remote attacker to cause a reload of the affected switch, resulting in a denial of service (DoS) condition. The vulnerability is due to improper processing of SSH connections. An attacker could exploit this vulnerability by logging in to an affected switch via SSH and sending a malicious SSH message. This vulnerability affects the following Cisco products when SSH is enabled: Small Business 300 Series Managed Switches, Small Business 500 Series Stackable Managed Switches, 350 Series Managed Switches, 350X Series Stackable Managed Switches, 550X Series Stackable Managed Switches, ESW2 Series Advanced Switches. Cisco Bug IDs: CSCvb48377.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
6.5
A vulnerability in the Secure Shell (SSH) subsystem of Cisco Small Business Managed Switches software could allow an authenticated, remote attacker to cause a reload of the affected switch, resulting in a denial of service (DoS) condition. The vulnerability is due to improper processing of SSH connections. An attacker could exploit this vulnerability by logging in to an affected switch via SSH and sending a malicious SSH message. This vulnerability affects the following Cisco products when SSH is enabled: Small Business 300 Series Managed Switches, Small Business 500 Series Stackable Managed Switches, 350 Series Managed Switches, 350X Series Stackable Managed Switches, 550X Series Stackable Managed Switches, ESW2 Series Advanced Switches. Cisco Bug IDs: CSCvb48377.
- Record
CVE-2017-6720- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 6.8 Medium
AV:N/AC:L/Au:S/C:N/I:N/A:C - Weakness
- CWE-119
- Updated
- 2026-11-02
CVE List No score
A vulnerability in the Secure Shell (SSH) subsystem of Cisco Small Business Managed Switches software could allow an authenticated, remote attacker to cause a reload of the affected switch, resulting in a denial of service (DoS) condition. The vulnerability is due to improper processing of SSH connections. An attacker could exploit this vulnerability by logging in to an affected switch via SSH and sending a malicious SSH message. This vulnerability affects the following Cisco products when SSH is enabled: Small Business 300 Series Managed Switches, Small Business 500 Series Stackable Managed Switches, 350 Series Managed Switches, 350X Series Stackable Managed Switches, 550X Series Stackable Managed Switches, ESW2 Series Advanced Switches. Cisco Bug IDs: CSCvb48377.
- Record
CVE-2017-6720- Weakness
- CWE-119
- Updated
- 2026-11-02
EUVDEUVD-2017-15774 No score
A vulnerability in the Secure Shell (SSH) subsystem of Cisco Small Business Managed Switches software could allow an authenticated, remote attacker to cause a reload of the affected switch, resulting in a denial of service (DoS) condition. The vulnerability is due to improper processing of SSH connections. An attacker could exploit this vulnerability by logging in to an affected switch via SSH and sending a malicious SSH message. This vulnerability affects the following Cisco products when SSH is enabled: Small Business 300 Series Managed Switches, Small Business 500 Series Stackable Managed Switches, 350 Series Managed Switches, 350X Series Stackable Managed Switches, 550X Series Stackable Managed Switches, ESW2 Series Advanced Switches. Cisco Bug IDs: CSCvb48377.
- Record
EUVD-2017-15774- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-vgpr-hxgc-qpwh
6.5
A vulnerability in the Secure Shell (SSH) subsystem of Cisco Small Business Managed Switches...
A vulnerability in the Secure Shell (SSH) subsystem of Cisco Small Business Managed Switches software could allow an authenticated, remote attacker to cause a reload of the affected switch, resulting in a denial of service (DoS) condition. The vulnerability is due to improper processing of SSH connections. An attacker could exploit this vulnerability by logging in to an affected switch via SSH and sending a malicious SSH message. This vulnerability affects the following Cisco products when SSH is enabled: Small Business 300 Series Managed Switches, Small Business 500 Series Stackable Managed Switches, 350 Series Managed Switches, 350X Series Stackable Managed Switches, 550X Series Stackable Managed Switches, ESW2 Series Advanced Switches. Cisco Bug IDs: CSCvb48377.
- Record
GHSA-vgpr-hxgc-qpwh- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-119
- Updated
- 2026-11-02
Affected products
- cisco esw2-350g-52 firmware
- cisco esw2-350g-52dc firmware
- cisco esw2-550x-48 firmware
- cisco esw2-550x-48dc firmware
- cisco sf300-08 firmware
- cisco sf300-24 firmware
- cisco sf300-24mp firmware
- cisco sf300-24p firmware
- cisco sf300-24pp firmware
- cisco sf300-48 firmware
- cisco sf300-48p firmware
- cisco sf300-48pp firmware
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- cisco sf302-08 firmware
- cisco sf302-08mp firmware
- cisco sf302-08mpp firmware
- cisco sf302-08p firmware
- cisco sf302-08pp firmware
- cisco sf350-48 firmware
- cisco sf350-48mp firmware
- cisco sf350-48p firmware
- cisco sf500-24 firmware
- cisco sf500-24p firmware
- cisco sf500-48 firmware
- cisco sf500-48p firmware
- cisco sf550x-24 firmware
- cisco sf550x-24mp firmware
- cisco sf550x-24p firmware
- cisco sf550x-48 firmware
- cisco sf550x-48mp firmware
- cisco sf550x-48p firmware
- cisco sg300-10 firmware
- cisco sg300-10mp firmware
- cisco sg300-10mpp firmware
- cisco sg300-10p firmware
- cisco sg300-10pp firmware
- cisco sg300-10sfp firmware
- cisco sg300-20 firmware
- cisco sg300-28 firmware
- cisco sg300-28mp firmware
- cisco sg300-28p firmware
- cisco sg300-28pp firmware
- cisco sg300-52 firmware
- cisco sg300-52mp firmware
- cisco sg300-52p firmware
- cisco sg350-10 firmware
- cisco sg350-10mp firmware
- cisco sg350-10p firmware
- cisco sg350-28 firmware
- cisco sg350-28mp firmware
- cisco sg350-28p firmware
- cisco sg350x-24 firmware
- cisco sg350x-24mp firmware
- cisco sg350x-24p firmware
- cisco sg350x-48 firmware
- cisco sg350x-48mp firmware
- cisco sg350x-48p firmware
- cisco sg350xg-24f firmware
- cisco sg350xg-24t firmware
- cisco sg350xg-2f10 firmware
- cisco sg350xg-48t firmware
- cisco sg355-10p firmware
- cisco sg500-28 firmware
- cisco sg500-28mpp firmware
- cisco sg500-28p firmware
- cisco sg500-52 firmware
- cisco sg500-52mp firmware
- cisco sg500-52p firmware
- cisco sg500x-24 firmware
- cisco sg500x-24p firmware
- cisco sg500x-48 firmware
- cisco sg500x-48p firmware
- cisco sg500xg-8f8t firmware
- cisco sg550x-24 firmware
- cisco sg550x-24mp firmware
- cisco sg550x-24mpp firmware
- cisco sg550x-24p firmware
- cisco sg550x-48 firmware
- cisco sg550x-48mp firmware
- cisco sg550x-48p firmware
- cisco sx550x-12f firmware
- cisco sx550x-16ft firmware
- cisco sx550x-24 firmware
- cisco sx550x-24f firmware
- cisco sx550x-24ft firmware
- cisco sx550x-52 firmware
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2017-6720 is a medium vulnerability (CVSS 6.5) in Cisco Esw2-350g-52 Firmware, published September 21, 2017. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.40%, the 72nd percentile. No source names a fixed version.