Is CVE-2026-102255 actively exploited?

Yes. Previdian has observed exploitation attempts targeting this CVE. Confidence is confirmed.

What exploitation activity has Previdian observed?

Previdian sensors have observed 24 exploitation attempts, 1 unique attacker IP, and 1 country targeting CVE-2026-102255. First observed Oct 09, 2026.

Which versions are affected?

CVE-2026-102255 affects SonicWall SMA1000. Reported affected versions include 12.4.3-03526 (platform-hotfix) and older versions and 12.5.0-02952 (platform-hotfix) and older versions.

How should organizations remediate it?

Prioritize immediate patching and validate internet-facing exposure. Monitor for matching exploitation attempts in your environment. A Previdian virtual patch is available for temporary WAF compensating controls while remediation is underway.

No. CVE-2026-102255 is not currently listed in CISA KEV.

CVE-2026-102255 Exploitation Observed — SMA1000

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2026-102255 is an unauthenticated vulnerability affecting SonicWall SMA1000. A Pre-authentication SSRF vulnerability exists in the SMA1000 Appliance Work Place interface due to an unintended alternate access path....

Is it exploited?

Yes. Previdian sensors observed exploitation attempts with confirmed confidence. Also confirmed by third-party sources.

Who is affected?

SonicWall / SMA1000 12.4.3-03526 (platform-hotfix) and older versions.

What should we do?

Patch immediately, validate internet-facing exposure, and monitor for matching requests.

Overview

SMA1000 Server-Side Request Forgery

A Pre-authentication SSRF vulnerability exists in the SMA1000 Appliance Work Place interface due to an unintended alternate access path.

By abusing this path, a remote unauthenticated attacker could potentially exploit this vulnerability to direct the appliance to issue requests on their behalf and reach internal functionality and perform unauthorized operations.

Vendor Product Affected Status

SonicWall Affected

SMA1000

12.4.3-03526 (platform-hotfix) and older versions 12.5.0-02952 (platform-hotfix) and older versions

Affected

View vendor advisory

Published: 07 Oct 2026
Exploitation Reported: 09 Oct 2026
Attack vector: Remote
Complexity: Low
Privileges: None
User interaction: None

CVE References

CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2026-102255
Vendor Advisory — psirt.global.sonicwall.com psirt.global.sonicwall.com · Vendor Advisory https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0017

Exploitation evidence

Why Previdian marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

Previdian

Recorded 09 Oct 2026

Previdian independently recorded this as exploited after first seeing it in honeypot sensors.

Active exploitation observed

Previdian sensor

First observed 09 Oct 2026

Previdian first observed exploitation attempts targeting this vulnerability in our honeypot sensors.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

Learn about Pro API access

Source	Added
Previdian Sensors First	2026-10-09 08:49 UTC
BleepingComputer	2026-10-09 13:21 UTC

Operational indicators for this CVE are listed under Detection.

Sensor telemetry

First-party evidence of exploitation activity

Previdian sensors recorded exploitation attempts targeting this vulnerability. The cards and chart show volume, unique attackers, and daily activity.

24

Attempts observed

1

Unique attacker IPs

1

Attacker countries

US

1

Sensors observed

CVE-2026-102255 exploitation attempts over the last 7 days

Daily events observed by Previdian sensors

Updated 09 Oct 2026

0

24

3 Oct 4 Oct 5 Oct 6 Oct 7 Oct 8 Oct 9 Oct

First observed 09 Oct 2026 · Last observed 09 Oct 2026

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Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
User-Agents
Callback hosts: 24; 1; 0

Request targets and User-Agents available in Pro. Callback host details available in Enterprise.

Scanner coverage

No scanner integrations recorded yet.

Virtual patch status

Previdian virtual patch guidance is available for this CVE.

AWS WAF Cloudflare ModSecurity

Attacker IP Indicators

Attacker IP indicators observed · available in Pro and Enterprise.

Sensor-derived attacker IP indicators are available to Pro and Enterprise accounts under Detection and through the Pro API.

Learn about Pro API access

Virtual Patch Detail

Compensating WAF rules for this CVE.

Available

Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to Previdian Enterprise users.

Talk to Sales Learn About Virtual Patches

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

10.0 Critical

Potential damage if exploited. Separate from whether attackers are using it.

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

EPSS

0.5%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Unintended Proxy or Intermediary ('Confused Deputy') CWE-441 Server-Side Request Forgery (SSRF) CWE-918

Recent mention · BleepingComputer

09 Oct 2026

Max severity SonicWall SMA1000 flaw now exploited in attacks

Attackers are exploiting a maximum-severity vulnerability in SonicWall SMA1000 appliances (CVE-2026-102255) that was patched on Tuesday, three days ago. [...]

Read full advisory

All Mentions

Recent mention · BleepingComputer

Max severity SonicWall SMA1000 flaw now exploited in attacks

BleepingComputer · 09 Oct 2026

Attackers are exploiting a maximum-severity vulnerability in SonicWall SMA1000 appliances (CVE-2026-102255) that was patched on Tuesday, three days ago. [...]

Recent mention · Security Affairs

SonicWall Fixes Max Severity Pre-Auth Flaw in SMA1000 Appliances

Security Affairs · 07 Oct 2026

SonicWall patched a CVSS 10 pre-auth SSRF flaw in SMA1000 appliances that could let unauthenticated attackers reach internal functions. SonicWall released hotfixes for four vulnerabilities in its SMA1000 remote access appliances, including a critical flaw tracked as CVE-2026-102255 (CVSS score of 10.0. The issue is a pre-authentication SSRF bug in the WorkPlace portal that could […]

Recent mention · The Hacker News

SonicWall Patches CVSS 10.0 Pre-Authentication SSRF Flaw in SMA1000 Appliances

The Hacker News · 07 Oct 2026

Swati KhandelwalOct 07, 2026Vulnerability / Network Security SonicWall has released hotfixes for four flaws in its SMA1000 appliances, the gateways that give remote workers access to a company's network and applications. The most serious could allow an attacker without a login to send requests through the appliance and reach internal functions. SonicWall rates it 10.0 on the CVSS scale and says it has no evidence that any of the four flaws is being used in attacks. The most serious flaw, tracked as CVE-2026-102255, is a server-side request forgery (SSRF) bug in WorkPlace, the portal that...

Recent mention · Sonicwall PSIRT

SonicWall SMA1000 Series Appliances Affected By Multiple Vulnerabilities

Sonicwall PSIRT · 06 Oct 2026

1) CVE-2026-102255 - Pre-authentication SSRF via unintended forward-proxy A Pre-authentication SSRF vulnerability exists in the SMA1000 Appliance Work Place interface due to an unintended alternate access path. By abusing this path, a remote unauthenticated attacker could potentially exploit this vulnerability to direct the appliance to issue requests on their behalf and reach internal functionality and perform unauthorized operations.CVSS Score: 10.0 CVSS Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H CWE-918: Server-Side Request Forgery (SSRF) CWE-441: Unintended Proxy or...

Timeline

From disclosure to observed exploitation

09 Oct 2026
13:21 UTC

KEV confirmed by BleepingComputer

Exploitation attested by an external source
09 Oct 2026
11:40 UTC

Virtual patch available

Compensating WAF rule available to block exploitation
09 Oct 2026
00:33 UTC

Indicator of compromise added

Indicators of compromise recorded
09 Oct 2026
00:33 UTC

Observed by Previdian sensors

Evidence-backed exploitation signal
07 Oct 2026
14:20 UTC

Added to the Previdian watchlist

Pro and Enterprise Watch users had 2 days of early warning before Previdian confirmed it as a KEV.
07 Oct 2026
13:07 UTC

CVE published

Vulnerability disclosed publicly
28 Sep 2026
19:39 UTC

CVE ID reserved

Identifier reserved by the CNA

Pro API

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Evidence confidence and provenance
First-party sensor telemetry
PoC and scanner references
Affected versions and enrichment
Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2026-102255

Free JSON includes basic KEV fields

{
  "cve_id": "CVE-2026-102255",
  "confidence": "Confirmed",
  "cvss_score": 10.0,
  "cvss_estimated": false,
  "epss_score": 0.00477,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": true
  },
  "sensor_telemetry": { "attempts": 24, "sensors": 1 }
}

CVE-2026-102255

SMA1000 Server-Side Request Forgery

Tags

CVE References

Exploited in the wild

Active exploitation observed

Known exploited vulnerability sources

Observed signals

Scanner coverage

Virtual patch status

Attacker IP Indicators

Virtual Patch Detail

Weaknesses

Max severity SonicWall SMA1000 flaw now exploited in attacks

All Mentions

KEV confirmed by BleepingComputer

Virtual patch available

Indicator of compromise added

Observed by Previdian sensors

Added to the Previdian watchlist

CVE published

CVE ID reserved

Automate this intelligence