Vulnerability report

Active exploitation observed Confirmed confidence In CISA KEV

CVE-2026-104935

Connect Secure Authentication Bypass

Ivanti / Connect Secure · 25.1.3.0

Watch CVE-2026-104935 Browse KEV feed
Severity
CVSS 8.6 · High
Confidence
Confirmed
Exploit status
Observed in sensors
EPSS
—
First observed
14 Oct 2026
Last observed
14 Oct 2026

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2026-104935 is an unauthenticated vulnerability affecting Ivanti Connect Secure. Authentication bypass by spoofing in ICS before version 25.1.3.0 allows a remote unauthenticated attacker to execute arbitrary...

Is it exploited?

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

Who is affected?

Ivanti / Connect Secure 25.1.3.0.

What should we do?

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

Overview

Connect Secure Authentication Bypass

Authentication bypass by spoofing in ICS before version 25.1.3.0 allows a remote unauthenticated attacker to execute arbitrary commands. This does not impact ICS version 22.7R2.14 or prior.

Ivanti Unaffected
Connect Secure
25.1.3.0 25.1.3.1 22.8R2.5 22.7R2.14
Published
13 Oct 2026
Exploitation Reported
13 Oct 2026
Attack vector
Remote
Complexity
Low
Privileges
None
User interaction
None

Tags

edge cisa nuclei_scanner

CVE References

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

CISA

Recorded 13 Oct 2026

A trusted third party reported exploitation.

Active exploitation observed

Previdian sensor

First observed 14 Oct 2026

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

Proof of concept available

Nuclei Templates

Recorded 14 Oct 2026

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

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

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Source Added
CISA First 2026-10-13 14:50 UTC
DarkWebInformer 2026-10-13 16:20 UTC
Rapid7 2026-10-13 17:21 UTC
Security Affairs 2026-10-13 19:21 UTC
Previdian Sensors 2026-10-14 02:05 UTC
The Hacker News 2026-10-14 12:31 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.

108

Attempts observed

51

Unique attacker IPs

3

Attacker countries

IN · SG · US

2

Sensors observed

CVE-2026-104935 exploitation attempts over the last 7 days

Daily events observed by Previdian sensors

Updated 14 Oct 2026

0
0
0
0
0
0
108
8 Oct 9 Oct 10 Oct 11 Oct 12 Oct 13 Oct 14 Oct

First observed 14 Oct 2026 · Last observed 14 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
2
8
0

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

Virtual patch status

No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

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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.

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Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner Reference Detected
Nuclei https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-104935.yaml 14 Oct 2026

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

8.6 High

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

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

EPSS

—

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

Weaknesses

Authentication Bypass by Spoofing CWE-290

Recent mention · Security Affairs

Volexity Uncovers Stealthy Ivanti VPN Attack Using Three Zero-Day Vulnerabilities

Ivanti VPN zero-days let attackers gain root access, steal credentials, evade detection, and prepare for wider network compromise. On October 5, Volexity started investigating suspicious activity at one of its monitoring customers and traced everything back to an Ivanti...

Read full advisory

All Mentions

Recent mention · Security Affairs

Volexity Uncovers Stealthy Ivanti VPN Attack Using Three Zero-Day Vulnerabilities

Security Affairs · 14 Oct 2026

Ivanti VPN zero-days let attackers gain root access, steal credentials, evade detection, and prepare for wider network compromise. On October 5, Volexity started investigating suspicious activity at one of its monitoring customers and traced everything back to an Ivanti Connect Secure VPN appliance running version 22.8R2.4, the latest build available at the time. Three chained […]

Recent mention · The Hacker News

CISA Urges Immediate Ivanti Connect Secure Updates as Honeypots Log 105 Exploit Attempts

The Hacker News · 14 Oct 2026

Ravie LakshmananOct 14, 2026Vulnerability / Cybercrime The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Tuesday urged organizations to take steps to immediately update their Ivanti Connect Secure (ICS) appliances and deployments to the latest version following the disclosure of an actively exploited vulnerability. The security flaw, tracked as CVE-2026-104935 (CVSS score: 8.6), is a case of authentication bypass impacting ICS versions 25.1.1.1 and prior, 25.1.2.2 and prior, and 22.8R2.4 and prior that could allow a remote unauthenticated attacker to execute arbitrary...

Recent mention · Security Affairs

U.S. CISA adds Ivanti Connect Secure flaw to its Known Exploited Vulnerabilities catalog

Security Affairs · 13 Oct 2026

U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds Ivanti Connect Secure flaw to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added an Ivanti Connect Secure FortiMail flaw, tracked as CVE-2026-104935 (CVSS score of 8.6), to its Known Exploited Vulnerabilities (KEV) catalog. The vulnerability is an authentication bypass issue caused by […]

Recent mention · Rapid7

Ivanti Connect Secure zero-day exploited in the wild (CVE-2026-104935)

Rapid7 · 13 Oct 2026

OverviewOn October 13, 2026, Ivanti published a security advisory for CVE-2026-104935, a high-severity authentication bypass by spoofing (CWE-290) affecting Ivanti Connect Secure (ICS). The vulnerability has a CVSSv3.0 score of 8.6 and allows a remote, unauthenticated attacker to execute arbitrary commands.Ivanti reports that exploitation in the wild has already occurred prior to disclosure, affecting a limited number of customers. This indicates that exploitation has been occurring as a zero-day vulnerability. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) confirms...

Recent mention · DarkWebInformer

Ivanti Patches Actively Exploited Connect Secure Zero-Day and Critical Credential-Leak Flaws

DarkWebInformer · 13 Oct 2026

Ivanti has released security updates for an actively exploited Connect Secure zero-day and six additional vulnerabilities affecting Neurons Patch for Intune and Xtraction.

Recent mention · The Hacker News

Attacker Chains Three Ivanti Connect Secure Zero-Days for Root Access, Only Two Patched So Far

The Hacker News · 13 Oct 2026

Swati KhandelwalOct 13, 2026Vulnerability / Enterprise Security An attacker chained three zero-day flaws in Ivanti Connect Secure, a VPN appliance, to run commands as root without logging in, security firm Volexity said on October 13. Ivanti has released fixes for two of the flaws and told customers on affected versions to "act immediately." A fix for the third is still pending, according to Volexity. Volexity, which reported the flaws to Ivanti, found the attack on one customer's appliance. The appliance was fully patched at the time and running version 22.8R2.4. The attacker, which...

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

Ivanti Connect Secure <= 22.8R2.4 - Authentication Bypass via X-DSCGI-PATH Header

nuclei · Created Unknown

Timeline

From disclosure to observed exploitation

  1. 12:31 UTC

    KEV confirmed by The Hacker News

    Exploitation attested by an external source

  2. 04:31 UTC

    Public PoC available

    Public proof-of-concept code published

  3. 04:31 UTC

    Nuclei template available

    Scanner coverage available

  4. 02:01 UTC

    Indicators of compromise added (51)

    Indicators of compromise recorded

  5. 02:01 UTC

    Observed by Previdian sensors

    Evidence-backed exploitation signal

  6. 19:21 UTC

    KEV confirmed by Security Affairs

    Exploitation attested by an external source

  7. 17:21 UTC

    KEV confirmed by Rapid7

    Exploitation attested by an external source

  8. 16:20 UTC

    KEV confirmed by DarkWebInformer

    Exploitation attested by an external source

  9. 15:31 UTC

    CVE published

    Vulnerability disclosed publicly

  10. 14:50 UTC

    Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  11. 17:07 UTC

    CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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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-2026-104935

Free JSON includes basic KEV fields 
{
  "cve_id": "CVE-2026-104935",
  "confidence": "Confirmed",
  "cvss_score": 8.6,
  "cvss_estimated": false,
  "epss_score": null,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": true
  },
  "sensor_telemetry": { "attempts": 108, "sensors": 2 }
}