CVE-2026-104935
Authentication bypass by spoofing in ICS before version 25.1.3.0 allows a remote unauthenticated attacker to execute arbitrary commands.
High
Known exploited
- Severity
- 8.6 / 10
- High · CVSS 3.1
- Exploit chance (EPSS)
- 86.77%
- Chance of exploitation in the next 30 days. Higher than 99.74% of scored vulnerabilities.
- Known exploited
- Yes
- In CISA's catalog since Oct 13, 2026
- Weakness
- CWE-290 Authentication Bypass by Spoofing
- Fix
- None yet
- No fixed version published
Exploited in the wild. Ivanti Connect Secure Authentication Bypass by Spoofing Vulnerability (Ivanti Connect Secure). Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines. Due for U.S. federal agencies by Oct 16, 2026.
Description
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.
How to fix
No fixed version has been published yet. Until one is, remove or replace the package, or turn off or isolate the affected feature. This page updates when a fix ships.
Severity breakdown
CVSS 3.1 8.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- Low
- Availability
- Low
Weakness
CWE-290: Authentication Bypass by Spoofing
This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.
References
Advisories
Other links
Timeline
- Added to CISA's Known Exploited Vulnerabilities catalog
- Published
- Last updated by the source
- Remediation due for U.S. federal agencies
- Latest EPSS score
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| CVE-2026-102764 The vulnerability exists within internal components of BeyondTrust’s Remote Support product. | Critical Known exploited | Same weakness, CWE-290 |
| GHSA-xv7q-fvmc-jx96 Vikunja: OIDC email-fallback account linking ignores email_verified, enabling local-account takeover | High | Same weakness, CWE-290 |
| GHSA-9q47-3cm2-2rp8 pyLoad: Rate-Limit Bypass and Audit-Log Spoofing via Trusted Client-Controlled `X-Forwarded-For` Header | Medium | Same weakness, CWE-290 |
| GHSA-66wr-7vmr-p5jq Payload authentication token field handling issue | Critical | Same weakness, CWE-290 |
| GHSA-4f6c-2vvp-gw82 Langflow: IP Spoofing Bypass via `X-Forwarded-For` Allowing Remote Configuration Write | High | Same weakness, CWE-290 |
| EEF-CVE-2026-76949 Remember-me sign-in guard reads a session key that is never written in ash_authentication, allowing session replacement | Not rated yet | Same weakness, CWE-290 |
| EEF-CVE-2026-91039 dynamic_oidc identities are not namespaced by connection in ash_authentication, allowing cross-connection account takeover | Not rated yet | Same weakness, CWE-290 |
| GHSA-jqcg-44mw-7w3h proxy-addr vulnerable to IP spoofing via IPv4-mapped IPv6 trust subnet | Critical | Same weakness, CWE-290 |
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