Exploited vulnerabilities / CVE-2026-20316
Confirmed exploited · privilege escalation · Cisco Secure Firewall Management Center (FMC)CVE-2026-20316
Cisco Secure Firewall Management Center (FMC) privilege escalation, confirmed exploited in the wild.
Cisco Secure Firewall Management Center (FMC) formerly known as Firepower Management Center contains a use of hard-coded password vulnerability that could allow an unauthenticated, remote attacker to log in to an affected device using a low-privileged account to access sensitive data within the impacted systems.
| CISA's name for it | Cisco Secure Firewall Management Center Use of Hard-coded Password Vulnerability |
|---|---|
| Vendor and product | Cisco · Secure Firewall Management Center (FMC) |
| Type | privilege escalation · CWE-259 |
| Exploited | Confirmed by CISA listed 29 July 2026 |
| Likelihood | one of the most likely to be exploited of every vulnerability tracked |
| Deadline | 1 August 2026 · already passed |
| Used in ransomware | Yes: CISA reports it used in ransomware campaigns |
| Advisories | sec.cloudapps.cisco.com ↗ · www.cisa.gov ↗ · www.cisa.gov ↗ · nvd.nist.gov ↗ |
Three steps, in this order
Install the update on every affected system, servers and workstations alike.
Escalation bugs are chained after a first foothold: check for other exposures an attacker could start from.
Review who holds administrative rights, and alert on new ones.
| CISA's required action | Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines. |
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Know before someone else finds it
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CVE-2026-20316 in short
Is CVE-2026-20316 being exploited?
Yes. CISA added CVE-2026-20316 to its Known Exploited Vulnerabilities catalogue on 29 July 2026, which it does only on evidence of exploitation in the wild.
What is the CISA deadline for CVE-2026-20316?
US federal agencies must remediate it by 1 August 2026. Everyone else should treat that date as the latest safe point to patch an internet-facing system.
How likely is CVE-2026-20316 to be exploited in the next 30 days?
FIRST's Exploit Prediction Scoring System gives it 35%, the 98th percentile of every CVE it scores.
How do I fix CVE-2026-20316?
Install the update on every affected system, servers and workstations alike. Escalation bugs are chained after a first foothold: check for other exposures an attacker could start from. Review who holds administrative rights, and alert on new ones.
Other Cisco vulnerabilities being exploited
| CVE | Product | Type | Listed |
|---|---|---|---|
| CVE-2026-20320 | BroadWorks | exploited vulnerability | 10 November 2026 |
| CVE-2026-76418 | Secure Firewall ASA Software and Cisco Secure FTD Software | denial of service | 29 October 2026 |
| CVE-2026-76519 | Secure Email Gateway | path traversal | 14 October 2026 |
| CVE-2026-76504 | Catalyst SD-WAN Manager | privilege escalation | 30 September 2026 |
| CVE-2026-76460 | Identity Services Engine | privilege escalation | 16 September 2026 |
| CVE-2026-76461 | Secure Email Gateway | SQL injection | 14 September 2026 |
Sources: CISA Known Exploited Vulnerabilities catalogue (released 10 November 2026) and FIRST EPSS. Page compiled automatically by SAK T.L.M, the threat-intelligence tool of SAK T.E.C, on 13 November 2026.