# CVE-2026-76437 — Cisco License On-Prem

> As of 2026-10-07, CVE-2026-76437 is a MEDIUM-severity vulnerability in Cisco License On-Prem, CVSS v3.1 4.9, EPSS 0.5% (42.3th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-76437, most recently “Cisco October 2026 Security Advisories: Critical Flaws in Meraki, License (SSM) On-Prem, NX-OS, APIC and Finesse (CVE-2026-76464, CVE-2026-20328, CVE-2026-76485 and others)”.

**Last updated:** 2026-10-07

## What is CVE-2026-76437?

A vulnerability in the web-based user interface of Cisco License On-Prem, formerly Cisco Smart Software Manager On-Prem (SSM On-Prem), could allow an authenticated, remote attacker to execute arbitrary commands on the underlying operating system. This vulnerability is due to improper validation of user-supplied content within configurations that are submitted to the web-based management interface. An attacker could exploit this vulnerability by updating configurations within the web-based management interface. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system with root privileges. To exploit this vulnerability, the attacker must have valid administrative credentials. Because only an attacker who already holds system administrator privileges can exploit the vulnerability, the only additional privileges gained include the ability to turn off the system, which an administrative user could not normally do.

The record classifies CVE-2026-76437 under weakness class [CWE-78](https://intel.threadlinqs.com/cwe/CWE-78). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs high-privilege credentials, needs no user interaction, and has high impact on availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 3 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 4.9 — MEDIUM (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H`)
- **EPSS (FIRST):** 0.5% probability of exploitation in the next 30 days, higher than 42.3% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 4.1/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-10-07

## Is CVE-2026-76437 being exploited?

It currently carries a trending score of 45 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [Cisco](https://intel.threadlinqs.com/vendors/cisco): License On-Prem

## How to fix CVE-2026-76437

No vendor patch reference has been recorded for CVE-2026-76437 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-76437

1 tracked threat in the Threadlinqs corpus references CVE-2026-76437, either in the campaign’s CVE list or as an indicator on the campaign record.

- [Cisco October 2026 Security Advisories: Critical Flaws in Meraki, License (SSM) On-Prem, NX-OS, APIC and Finesse (CVE-2026-76464, CVE-2026-20328, CVE-2026-76485 and others)](https://intel.threadlinqs.com/threat/TL-2026-3108) — CRITICAL · 2026-10-09

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-10-10. This product uses the NVD API but is not endorsed or certified by the NVD.

**Other references**

- [sec.cloudapps.cisco.com](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ssm-access-nttb2dhE)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-76437
Full detection coverage and IOCs for threats exploiting CVE-2026-76437 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp