What is CVE-2016-1303?

CVE-2016-1303 is a high-severity vulnerability in Cisco 500 Series Switch Firmware, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2016-01-30.

How severe is CVE-2016-1303?

High severity. CVSS v3 base score is 7.5 out of 10.

Improper input validation in Cisco 500 Series Switch Firmware

CVE-2016-1303

The web GUI on Cisco Small Business 500 devices 1.2.0.92 allows remote attackers to cause a denial of service via a crafted HTTP request, aka Bug ID CSCul65330.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2016-01-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.013 (70.4th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 70.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Cisco 500 Series Switch Firmware — versions 1.2.0.92
Cisco Sf500-24
Cisco Sf500-24p
Cisco Sf500-48
Cisco Sf500-48p
Cisco Sg500-28
Cisco Sg500-28mpp
Cisco Sg500-28p
Cisco Sg500-52
Cisco Sg500-52mp

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160128… (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2016-1303?: CVE-2016-1303 is a high-severity vulnerability in Cisco 500 Series Switch Firmware, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2016-01-30.
How severe is CVE-2016-1303?: High severity. CVSS v3 base score is 7.5 out of 10.