CVE-2026-20316: Cisco Secure Firewall Management Center Use of Hard-coded Password Vulnerability

Patch now

MEDIUM 5.3EXPLOITEDREMOTEUPGRADE

CVE-2026-20316 is a medium-severity flaw (CVSS 5.3) affecting secure firewall management center, reported as exploited in the wild. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability in the web interface of Cisco Secure Firewall Management Center (FMC) Software 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. This vulnerability is due to the presence of static user credentials for a low-privileged account. An attacker could exploit this vulnerability by using the account to log in to an a

Why this priority

EPSS top 2%: very likely to be exploited
Exploited in the wild (CISA KEV)
Used in ransomware campaigns
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	35.1% (top 2%)
CISA exploited list	Yes, fix due 2026-08-01, used in ransomware
Weakness	CWE-259
Published	2026-07-29
Last modified	2026-10-24

Publisher (CNA): Cisco Systems, Inc. · Vendor: cisco

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-29Exploited Added to the CISA Known Exploited Vulnerabilities list
2026-07-29 17:16 UTCPublished CVE record published
2026-08-01Deadline CISA due date for US federal agencies to patch
2026-10-24 13:10 UTCUpdated Record last modified

cisco secure firewall management center UPGRADE

Affected: >= 7.0.0 and <= 7.0.9 · >= 7.2.0 and <= 7.2.11 · >= 7.3.0 and <= 7.3.1.2 · >= 7.4.0 and <= 7.4.7 · >= 7.6.0 and <= 7.6.5 · >= 7.7.0 and <= 7.7.12 · >= 10.0.0 and <= 10.0.1

Fixed in: newer than 10.0.1

Safe to downgrade to: a release before 7.0.0

1. Check installed version

apt-cache policy secure-firewall-management-center || rpm -q secure-firewall-management-center || secure-firewall-management-center --version

2. UPGRADE to newer than 10.0.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade secure-firewall-management-center

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade secure-firewall-management-center

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 7.0.0 (Debian / Ubuntu)

apt-cache madison secure-firewall-management-center sudo apt install secure-firewall-management-center=<VERSION_BEFORE_7.0.0> sudo apt-mark hold secure-firewall-management-center

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list secure-firewall-management-center sudo dnf downgrade secure-firewall-management-center-<VERSION_BEFORE_7.0.0> sudo dnf versionlock add secure-firewall-management-center

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

Fedora 46 · gnome-shell-extension-tiling-assistant · FIXED · 56-1.fc46 · FEDORA-2026-ebf66a5321 · source

sudo dnf upgrade --advisory=FEDORA-2026-ebf66a5321

Verify at the official source NVD · CVE Program · CISA KEV catalog · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-20316?

secure firewall management center: upgrade to newer than 10.0.1. Exact commands for each OS are on this page.

Is CVE-2026-20316 being exploited?

Yes. CVE-2026-20316 is on the CISA Known Exploited Vulnerabilities list, so treat it as patch-now.

What does CVE-2026-20316 affect?

CVE-2026-20316 affects secure firewall management center. Severity is medium (CVSS 5.3). A vulnerability in the web interface of Cisco Secure Firewall Management Center (FMC) Software could allow an unauthenticated, remote attacker to log in to an affected device using a low-privileged account to access sensitive data within th

How urgent is CVE-2026-20316?

Priority 78/100. EPSS top 2%: very likely to be exploited; Exploited in the wild (CISA KEV); Used in ransomware campaigns; Remotely exploitable, no login, no user action

Software pages

Cisco vulnerabilities

Related CVEs

CVE-2026-20079 CRITICAL 10.0 EXPLOITED DOWNGRADE Cisco Firewall Management Center Authentication Bypass Using an Alternate Path or Channel Vulnerability

References

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