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NVD / CVE Program· CNA sonicwall

CVE-2026-4116: Improper handling of Unicode encoding in SonicWall SMA1000 series appliances allows a remote authenticated SSLVPN user to bypass Workplace/C

Noroxi assessment

Priority: Monitor (action score 28/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.41% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. Administrator privileges are required. No user action is required. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Improper handling of Unicode encoding in SonicWall SMA1000 series appliances allows a remote authenticated SSLVPN user to bypass Workplace/Connect Tunnel TOTP authentication.

HighCVSS 7.2 · v3.1—No exploit No fix recorded
Published
Apr 9, 2026
Updated
Oct 26, 2026
EPSS
0.4% · 35th percentile

Report tools

JSON

Action score

28

Monitor

Low priority for now.

CVSS
28 / 40 · 7.2 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-4116

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
sonicwallsma6210 firmware
sonicwallsma6210
sonicwallsma6200 firmware
sonicwallsma6200
sonicwallsma7200 firmware
sonicwallsma7200
sonicwallsma7210 firmware
sonicwallsma7210
sonicwallsma8200v

Using sma6210 firmware? Add it to your stack and be the first to know about CVEs like this one. (VPN gateway)

Watch new CVEs for sma6210 firmware

When you'll hear from us

  • when a new CVE affecting this product is published
  • when a record in your stack enters KEV or gets exploit code

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every Monday

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • sonicwall sma6200 firmwarebefore 12.4.3-03387
  • sonicwall sma6200 firmware12.5.0 and later · before 12.5.0-02624
  • sonicwall sma6210 firmware12.5.0 and later · before 12.5.0-02624
  • sonicwall sma6210 firmwarebefore 12.4.3-03387
  • sonicwall sma7200 firmware12.5.0 and later · before 12.5.0-02624
  • sonicwall sma7200 firmwarebefore 12.4.3-03387
  • sonicwall sma7210 firmwarebefore 12.4.3-03387
  • sonicwall sma7210 firmware12.5.0 and later · before 12.5.0-02624
  • sonicwall sma8200vbefore 12.4.3-03387
  • sonicwall sma8200v12.5.0 and later · before 12.5.0-02624

Versions reported by the vendor

Affected version ranges reported by the assigning authority (sonicwall). Independent of NVD's CPE analysis and usually ahead of it.

  • SonicWall SMA1000

    • 12.4.3-03245 (platform-hotfix) and earlier versions., 12.5.0-02283 (platform-hotfix) and earlier versions.affected

Same product

sonicwall: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-15409A Server-side request forgery (SSRF) vulnerability has been identified in the SMA1000 Appliance Work Place interface.KEV
    72This week
  • CVE-2026-15410Post-authentication improper control of generation of code ('Code Injection') vulnerability has been identified in the SMA1000 Appliance ManKEV
    62This week
  • CVE-2026-4113An observable response discrepancy vulnerability in the SonicWall SMA1000 series appliances allows a remote attacker to enumerate SSL VPN us
    28Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2026-4112Apr 9, 2026 · Improper neutralization of special elements used in an SQL command (“SQL Injection”) in SonicWall SMA1000 series appliances allows a remote
    28Monitor
  • ← EarlierCVE-2026-4114Apr 9, 2026 · Improper handling of Unicode encoding in SonicWall SMA1000 series appliances allows a remote authenticated SSLVPN admin to bypass AMC TOTP a
    26Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-41140 days apartImproper handling of Unicode encoding in SonicWall SMA1000 series appliances allows a remote authenticated SSLVPN admin to bypass AMC TOTP a
    26Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • Administrator privileges are required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-176 · Improper Handling of Unicode Encoding

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records