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SonicWall SMA1000 EUVDEUVD-2026-69704

| CVE-2026-83548 CRITICAL
Server-Side Request Forgery (SSRF) (CWE-918)
2026-09-01 sonicwall GHSA-ghw2-cfh2-xvgc
10.0
CVSS 3.1 · Vendor: sonicwall
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Identify internet-facing SMA1000 Work Place portal
  2. Delivery
    Send crafted request to alternate access path
  3. Exploit
    Trigger pre-auth SSRF (CWE-918)
  4. Execution
    Reach internal/sensitive functionality
  5. Impact
    Perform unauthorized operations, pivot inward

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V4 - API and Web Service URL allowlisting, SSRF prevention
MITRE ATT&CK

2 techniques across 2 tactics: Initial Access, Credential Access

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

No special conditions beyond network reachability - remote unauthenticated exploitation against the SMA1000 Work Place interface, which is typically internet-exposed by design. The only prerequisite is that the appliance's Work Place portal is reachable by the attacker and runs a vulnerable firmware build (<=12.4.3-03453 or <=12.5.0-02835 platform-hotfix). Limiting factors: appliances whose Work Place/management interface is not internet-facing or is IP-restricted materially reduce exposure; no authentication, user interaction, or non-default configuration is required otherwise.

Impact

This is a genuine top-tier priority, not an inflated-score paper risk. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:C, full C/I/A high) describes trivial, network-reachable, unauthenticated exploitation of an internet-facing security appliance, and SSVC corroborates this with Automatable=yes and Technical Impact=total. Publicly available exploit code sharply raises near-term risk, and SonicWall SMA devices have a track record of active targeting, so any internet-exposed SMA1000 should be treated as urgent by operators of every size. Two signals warrant caution: SSVC lists Exploitation=none (no confirmed active exploitation of THIS CVE in the provided data, even though a news source discusses SMA exploitation generally), so this is not confirmed CISA KEV; and the vendor's 10.0 with S:C and full I:H/A:H is arguably aggressive for an SSRF whose primary documented effect is unauthorized access to functionality - treat the availability/integrity impact as partly inferred pending vendor detail.

Exploit ScenarioDerived

An attacker scans for internet-facing SMA1000 Work Place portals and sends a crafted unauthenticated request to the unintended alternate access path, coercing the appliance to invoke internal functionality or relay requests to back-end services. Using publicly available exploit code, they perform unauthorized operations against components that should require authentication, pivoting from the edge gateway toward internal resources. Because exploitation is fully automatable, mass scanning-and-exploitation of exposed appliances is realistic.

Emergency Immediate action required. Why: CRITICAL + in CISA KEV (actively exploited), no patch available.
Exploited in the wild (CISA KEV) 2 public PoCs No patch listed yet 0.3% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 02, 2026

Pre-authentication server-side request forgery in the SonicWall SMA1000 secure-access appliance's Work Place interface lets a remote unauthenticated attacker abuse an unintended alternate access path to reach internal/sensitive functionality and perform unauthorized operations. It affects SMA1000 firmware up to and including 12.4.3-03453 and 12.5.0-02835 (platform-hotfix builds and older), carries a maximal CVSS of 10.0, and has publicly available exploit code. SonicWall SMA appliances have been a repeated target of real-world attacks, and reporting ties this to broader SMA exploitation activity, though CISA KEV listing is not confirmed in the provided data.

RemediationAI

Apply the SonicWall PSIRT fix per advisory SNWLID-2026-0016 (https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0016) - upgrade to a platform-hotfix build newer than 12.4.3-03453 on the 12.4.x branch and newer than 12.5.0-02835 on the 12.5.x branch (confirm the exact fixed hotfix build directly with SonicWall, as the provided data lists only the last-vulnerable versions). Until patched, restrict reachability of the Work Place interface: limit management/portal exposure to trusted source IPs or a VPN-fronted management network, place the appliance behind a WAF/reverse proxy that filters the alternate access path, and monitor for anomalous outbound requests originating from the appliance (SSRF indicator). The trade-off of source-IP restriction is reduced remote-worker accessibility, so scope allowlists to known ranges; note that as a pre-auth network flaw, workarounds are stopgaps only and patching is the sole reliable fix.

Affected VersionsENISA

SMA1000 12.4.3-03453 (platform-hotfix) and older versions
SMA1000 12.5.0-02835 (platform-hotfix) and older versions

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The affected product is SonicWall's SMA1000 series, an enterprise SSL-VPN / secure mobile access gateway that fronts internal applications for remote workforces (CPE cpe:2.3:a:sonicwall:sma1000). The root cause is CWE-918 (Server-Side Request Forgery): the Work Place web interface exposes an 'unintended alternate access path' that lets externally supplied input coerce the appliance into issuing requests or invoking functionality it should not expose pre-authentication. Because the appliance sits at the network edge yet has trusted reachability into back-end/management components, an SSRF here effectively turns the gateway into a proxy for reaching otherwise protected internal endpoints without credentials.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (sonicwall) PRIMARY 10.0 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
ENISA EUVD CRITICAL
vuln.today AI 10.0 CRITICAL

Pre-auth network SSRF on an edge appliance justifies AV:N/AC:L/PR:N/UI:N and S:C reaching internal systems; C:H and I:H fit unauthorized access/operations, but availability impact is unclear so A:L rather than A:H.

3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:L/SI:L/SA:N

Primary rating from Vendor (sonicwall).

CVSS VectorVendor: sonicwall

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

4
Added to CISA KEV
Sep 02, 2026 - 17:02 CISA
CVSS changed
Sep 02, 2026 - 14:22 NVD
10.0 (CRITICAL)
CVE Published
Sep 01, 2026 - 21:25 cve.org
UNKNOWN (no severity yet)
CVE Published
Sep 01, 2026 - 21:25 cve.org
CRITICAL 10.0

DescriptionCVE.org

A Pre-authentication SSRF vulnerability exists in the SMA1000 Appliance Work Place interface due to an unintended alternate access path. A remote unauthenticated attacker could potentially exploit this vulnerability to gain unauthorized access to sensitive functionality and perform unauthorized operations.

Technical POC Analysis

The bug class is CWE-918, server-side request forgery.

Full technical POC analysis - root cause, step-by-step exploitation and patch breakdown - is part of the Pro and Business plans.

Latest POC

2 public PoC links from metasploit, nuclei

Sign in to open the public PoC links collected for this CVE.

Executive ViewAI

Why It Matters

SonicWall SMA1000 secure-access appliances running firmware 12.4.3-03453, 12.5.0-02835, or earlier contain a critical pre-authentication SSRF vulnerability (CVSS 10.0) that allows unauthenticated remote attackers to bypass authentication and access internal systems without interaction. Organizations deploying SMA1000 devices for remote access face immediate risk of network intrusion and lateral movement into sensitive infrastructure, with publicly available exploit code already circulating and no vendor patch currently available.

Business Impact: Severe
Compensating Controls

No vendor-released patch identified at time of analysis. Interim mitigations: (1) Network isolation-restrict unauthenticated access to SMA1000 Work Place interface via firewall rules to authorized administrator IP ranges only; (2) IDS/IPS detection-deploy signatures targeting SSRF patterns and anomalous internal requests originating from the SMA1000; (3) Access hardening-enforce multi-factor authentication at network perimeter and implement geographic/device-based conditional access policies; (4) Segmentation-isolate SMA1000 appliances on dedicated management networks with restricted routing to critical internal assets; (5) Monitoring-enable comprehensive logging and establish alerts for failed authentication attempts and internal resource access requests from the SMA1000.

Threat Model

5 threats: Elevation of Privilege, Tampering, Information Disclosure and 1 more

5-step attack chain with trust boundaries and controls

Full threat model - attack chain, trust boundaries, controls per stage and evidence - is part of the Pro and Business plans.

Threat Intelligence Overview

Threat Score
6.0/10
Composite threat intelligence
EPSS Score
0.3%
Top 82% exploitable
Prevalence
Medium
enterprise SSL-VPN appliance, common in mid/large orgs but a specific vendor line
EU Gov Alert
Listed
Top-tier national CERT alert
Threat Intel
3
1 sources
Social Media
92
Sightings
Data Quality
9 sources
Confidence: High

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity CRITICAL
CISA KEV Yes
Public POC Yes
EPSS 0.3%
Patch available No
Active threat Yes
Deciding rule
CRITICAL + in CISA KEV (actively exploited), no patch available
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision
Out-of-Cycle
Exploitation
None
System Exposure· derived
Open
Automatable
Yes
Human Impact
Very High
Technical Impact
Total

Priority Score

155
Low Medium High Critical
KEV: +50
EPSS: 0
CVSS: +50
PoC: +20
Weaponized: +15
Threat intel: 0
Gov advisory: +20

Attack Technique

Server-Side Request Forgery exploits applications that fetch remote resources based on user-supplied URLs.

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

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