PatchTheCVECVE-2026-4113: An observable response discrepancy vulnerability in the SonicWall SMA1000 series appliances allows a remote at
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Routine
HIGH 7.2UPGRADEUPGRADEUPGRADE
CVE-2026-4113 is a high-severity flaw (CVSS 7.2) affecting sma6210 firmware, sma8200v, sma7200 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
An observable response discrepancy vulnerability in the SonicWall SMA1000 series appliances allows a remote attacker to enumerate SSL VPN user credentials.
Why this priority
- High severity
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.2 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | High |
| User interaction | None |
| EPSS exploit chance | 0.4% (top 70%) |
| CISA exploited list | No |
| Weakness | CWE-204 |
| Published | 2026-04-09 |
| Last modified | 2026-10-26 |
Publisher (CNA): SonicWALL, Inc. · Vendor: sonicwall
Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
sonicwall sma6210 firmware UPGRADE
Affected: < 12.4.3-03387 · >= 12.5.0 and < 12.5.0-02624
Fixed in: 12.4.3-03387, 12.5.0-02624
Safe to downgrade to: a release before 12.5.0
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
sonicwall sma8200v UPGRADE
Affected: < 12.4.3-03387 · >= 12.5.0 and < 12.5.0-02624
Fixed in: 12.4.3-03387, 12.5.0-02624
Safe to downgrade to: a release before 12.5.0
1. Check installed version
apt-cache policy sma8200v || rpm -q sma8200v || sma8200v --version
2. UPGRADE to 12.4.3-03387 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade sma8200v
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade sma8200v
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 12.5.0 (Debian / Ubuntu)
apt-cache madison sma8200v
sudo apt install sma8200v=<VERSION_BEFORE_12.5.0>
sudo apt-mark hold sma8200v
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list sma8200v
sudo dnf downgrade sma8200v-<VERSION_BEFORE_12.5.0>
sudo dnf versionlock add sma8200v
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.
sonicwall sma7200 firmware UPGRADE
Affected: < 12.4.3-03387 · >= 12.5.0 and < 12.5.0-02624
Fixed in: 12.4.3-03387, 12.5.0-02624
Safe to downgrade to: a release before 12.5.0
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
sonicwall sma7210 firmware UPGRADE
Affected: < 12.4.3-03387 · >= 12.5.0 and < 12.5.0-02624
Fixed in: 12.4.3-03387, 12.5.0-02624
Safe to downgrade to: a release before 12.5.0
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
sonicwall sma6200 firmware UPGRADE
Affected: < 12.4.3-03387 · >= 12.5.0 and < 12.5.0-02624
Fixed in: 12.4.3-03387, 12.5.0-02624
Safe to downgrade to: a release before 12.5.0
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
Verify at the official source NVD · CVE Program · 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.
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-2026-4113?
sma6210 firmware: upgrade to 12.4.3-03387, 12.5.0-02624; sma8200v: upgrade to 12.4.3-03387, 12.5.0-02624; sma7200 firmware: upgrade to 12.4.3-03387, 12.5.0-02624. Exact commands for each OS are on this page.
Is CVE-2026-4113 being exploited?
CVE-2026-4113 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-4113 affect?
CVE-2026-4113 affects sma6210 firmware, sma8200v, sma7200 firmware. Severity is high (CVSS 7.2). An observable response discrepancy vulnerability in the SonicWall SMA1000 series appliances allows a remote attacker to enumerate SSL VPN user credentials.
How urgent is CVE-2026-4113?
Priority 33/100. High severity
Software pages
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