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CVE-2019-1943· NVD / CVE Program· CNA cisco

Cisco Small Business Series Switches Open Redirect Vulnerability

A vulnerability in the web interface of Cisco Small Business 200, 300, and 500 Series Switches software could allow an unauthenticated, remote attacker to redirect a user to a malicious web page. The vulnerability is due to improper input validation of the parameters of an HTTP request. An attacker could exploit this vulnerability by intercepting a user's HTTP request and modifying it into a request that causes the web interface to redirect the user to a specific malicious URL. This type of vulnerability is known as an open redirect attack and is used in phishing attacks that get users to unknowingly visit malicious sites.

MediumCVSS 6.1 · v3.0—Proof of concept No fix recorded
Published
Jul 17, 2019
Updated
Jun 16, 2026
EPSS
9.7% · 95th percentile
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Action score

27

Monitor

Low priority for now.

CVSS
24 / 40 · 6.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
3 / 30 · 9.7%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
6.1
CNA · cisco
4.7
1.4 point gap

CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

VendorProduct
ciscosg200-50 firmware
ciscosg200-50
ciscosg200-50p firmware
ciscosg200-50p
ciscosg200-50fp firmware
ciscosg200-50fp
ciscosg200-26 firmware
ciscosg200-26
ciscosg200-26p firmware
ciscosg200-26p
ciscosg200-26fp firmware
ciscosg200-26fp

and 102 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • cisco sf200-24 firmwareall versions
  • cisco sf200-24fp firmwareall versions
  • cisco sf200-24p firmwareall versions
  • cisco sf200-48 firmwareall versions
  • cisco sf200-48p firmwareall versions
  • cisco sf300-08 firmware1.3.7.18
  • cisco sf300-24 firmware1.3.7.18
  • cisco sf300-24mp firmware1.3.7.18
  • cisco sf300-24p firmware1.3.7.18
  • cisco sf300-24pp firmware1.3.7.18
  • cisco sf300-48 firmware1.3.7.18
  • cisco sf300-48p firmware1.3.7.18
  • cisco sf300-48pp firmware1.3.7.18
  • cisco sf302-08 firmware1.3.7.18
  • cisco sf302-08mp firmware1.3.7.18
  • cisco sf302-08mpp firmware1.3.7.18
  • cisco sf302-08p firmware1.3.7.18
  • cisco sf302-08pp firmware1.3.7.18
  • cisco sf500-24 firmwareall versions
  • cisco sf500-24p firmwareall versions

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.

  • Cisco Cisco Small Business 300 Series Managed Switches

    • 1.3.7.18affected

Same product

cisco: all records

Other highest-scoring records for the same primary product.

  • CVE-2018-15439Cisco Small Business Switches Privileged Access Vulnerability
    54Plan
  • CVE-2020-3147Cisco Small Business Switches Denial of Service Vulnerability
    31Monitor
  • CVE-2019-1859Cisco Small Business Switches Secure Shell Certificate Authentication Bypass Vulnerability
    28Monitor
  • CVE-2020-3496Cisco Small Business Smart and Managed Switches Denial of Service Vulnerability
    22Monitor

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

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Exploit-DB entry ×1
  • Nuclei detection template ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Exploit-DB entrywebapps2019-07-15
Nuclei detection templateNuclei template CVE-2019-1943 —

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.

  1. First PoC-3 d
  2. Published
  3. TodaySep 30, 2026+2632 d
EPSS, last 120 days

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 researchers

Finders, 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.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
low · data can be read
Integrity
low · data or configuration can be modified
Availability
none

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Changed
Confidentiality impact
Low
Integrity impact
Low
Availability impact
None

Weakness class (CWE)

CWE-601 · URL Redirection to Untrusted Site ('Open Redirect')

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

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.

ATT&CK techniques

—

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; 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 help

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records