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CVE-2017-6720

18
FAUCET Score

CVE-2017-6720 is a denial-of-service vulnerability in the SSH subsystem of various Cisco Small Business Managed Switches. An authenticated, remote attacker can exploit improper SSH connection processing by sending a malicious SSH message, causing the switch to reload. This vulnerability has a CVSS score of 6.5 (Medium), indicating a network-based attack with low complexity and high impact on availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.4.8.06CPE matchmatch criteria
cpe:2.3:o:cisco:sf302-08pp_firmware:*:*:*:*:*:*:*:*
< 1.4.8.06CPE matchmatch criteria
cpe:2.3:o:cisco:sf302-08mpp_firmware:*:*:*:*:*:*:*:*
< 1.4.8.06CPE matchmatch criteria
cpe:2.3:o:cisco:sg300-10pp_firmware:*:*:*:*:*:*:*:*
< 1.4.8.06CPE matchmatch criteria
cpe:2.3:o:cisco:sg300-10mpp_firmware:*:*:*:*:*:*:*:*
< 1.4.8.06CPE matchmatch criteria
cpe:2.3:o:cisco:sf300-24pp_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.40%
Probability of exploitation in next 30 days
EPSS Percentile
69.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0140 is in the 83rd percentile among its peer group of 21,958 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-20170920-sbms
Vendor Advisory
securityfocus.com / bid/100933
Third Party AdvisoryVDB Entry