A vulnerability in the Secure Shell (SSH) subsystem of Cisco Small Business Managed Switches software could allow an authenticated, remote a
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.
- Published
- Sep 21, 2017
- Updated
- Jun 16, 2026
- EPSS
- 1.4% · 71th percentile
- CWE
- CWE-119
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Report tools
Action score
26
Monitor
Low priority for now.
- CVSS
- 26 / 40 · 6.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 1.4%
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| cisco | sf302-08pp firmware | cpe:2.3:o:cisco:sf302-08pp_firmware |
| cisco | sf302-08pp | cpe:2.3:h:cisco:sf302-08pp |
| cisco | sf302-08mpp firmware | cpe:2.3:o:cisco:sf302-08mpp_firmware |
| cisco | sf302-08mpp | cpe:2.3:h:cisco:sf302-08mpp |
| cisco | sg300-10pp firmware | cpe:2.3:o:cisco:sg300-10pp_firmware |
| cisco | sg300-10pp | cpe:2.3:h:cisco:sg300-10pp |
| cisco | sg300-10mpp firmware | cpe:2.3:o:cisco:sg300-10mpp_firmware |
| cisco | sg300-10mpp | cpe:2.3:h:cisco:sg300-10mpp |
| cisco | sf300-24pp firmware | cpe:2.3:o:cisco:sf300-24pp_firmware |
| cisco | sf300-24pp | cpe:2.3:h:cisco:sf300-24pp |
| cisco | sf300-48pp firmware | cpe:2.3:o:cisco:sf300-48pp_firmware |
| cisco | sf300-48pp | cpe:2.3:h:cisco:sf300-48pp |
and 158 more
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- cisco esw2-350g-52 firmwarebefore 1.4.8.06
- cisco esw2-350g-52dc firmwarebefore 1.4.8.06
- cisco esw2-550x-48 firmwarebefore 1.4.8.06
- cisco esw2-550x-48dc firmwarebefore 1.4.8.06
- cisco sf300-08 firmwarebefore 1.4.8.06
- cisco sf300-24 firmwarebefore 1.4.8.06
- cisco sf300-24mp firmwarebefore 1.4.8.06
- cisco sf300-24p firmwarebefore 1.4.8.06
- cisco sf300-24pp firmwarebefore 1.4.8.06
- cisco sf300-48 firmwarebefore 1.4.8.06
- cisco sf300-48p firmwarebefore 1.4.8.06
- cisco sf300-48pp firmwarebefore 1.4.8.06
- cisco sf302-08 firmwarebefore 1.4.8.06
- cisco sf302-08mp firmwarebefore 1.4.8.06
- cisco sf302-08mpp firmwarebefore 1.4.8.06
- cisco sf302-08p firmwarebefore 1.4.8.06
- cisco sf302-08pp firmwarebefore 1.4.8.06
- cisco sf350-48 firmwarebefore 2.3.0.130
- cisco sf350-48mp firmwarebefore 2.3.0.130
- cisco sf350-48p firmwarebefore 2.3.0.130
Versions reported by the vendor
Affected version ranges reported by the assigning authority (cisco). Independent of NVD's CPE analysis and usually ahead of it.
n/a Cisco Small Business Managed Switches
- Cisco Small Business Managed Switchesaffected
Same product
cisco: all recordsOther highest-scoring records for the same primary product.
- CVE-2019-1814Cisco Small Business 300 Series Managed Switches DHCP Denial of Service Vulnerability35Monitor
- CVE-2018-0465Cisco Small Business 300 Series Managed Switches Cross-Site Scripting Vulnerability24Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory BufferCVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Buffer Overflow via Environment VariablesCAPEC-10likelihood: High · High
- Overflow BuffersCAPEC-100likelihood: High · Very High
- Buffer ManipulationCAPEC-123likelihood: High · Very High
- Client-side Injection-induced Buffer OverflowCAPEC-14likelihood: Medium · High
- Filter Failure through Buffer OverflowCAPEC-24likelihood: High · High
- MIME ConversionCAPEC-42likelihood: High · High
- Overflow Binary Resource FileCAPEC-44likelihood: High · Very High
- Buffer Overflow via Symbolic LinksCAPEC-45likelihood: High · High
ATT&CK techniques
—
Change log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
- www.securityfocus.com/bid/100933
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170920-sbms
Vendor advisories and official records. Exploit/PoC links are deliberately left out.