Ivanti Connect Secure
CVE-2026-104935
Ivanti Connect Secure contains an authentication bypass by spoofing vulnerability that allows a remote unauthenticated attacker to execute arbitrary commands.
What this means for your business
- It affects Ivanti Connect Secure. It matters if your company, or a supplier that handles your data, runs it.
- Attackers are already using it. CISA added it to its list of flaws used in real attacks on 13 October 2026.
- FIRST's prediction model gives it a 26% chance of attack attempts being seen in the next 30 days, ranking above 97% of all known flaws.
What to do
- 1Check whether your company or your suppliers run Ivanti Connect Secure.
- 2If you do, follow CISA's required action below. No patch reference has been published yet.
- 3Treat it as urgent. US federal agencies must fix it by 16 October 2026. That deadline does not apply to private companies, but it shows how seriously CISA takes it.
- 4Because attackers have used it, check the affected systems for signs of a break-in, not only for the update.
Fastnexa security experts
Attackers are already using this flaw. Is your Ivanti Connect Secure exposed?
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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.
CISA’s wording, unedited. The notes it mentions are in CISA’s catalogue entry.
Scoring
- CVSS
- Not yet scored
Dates
- Published
- 2026-10-13
- Added to KEV
- 2026-10-13
- Remediation due
- 2026-10-16
- Sources
- CISA KEV
Coverage
- Ivanti ICS Zero-Day Attacks Highlight Vendor Patching HurdlesDark Reading · 2026-10-14
- CISA Urges Immediate Ivanti Connect Secure Updates as Honeypots Log 105 Exploit AttemptsThe Hacker News · 2026-10-14
- Ivanti security advisory (AV26-1035)Canadian Centre for Cyber Security · 2026-10-13
- Ivanti Zero-Day Chain Gave Attackers Root Access to Fully Patched VPNSecurityWeek · 2026-10-13
- Ivanti Connect Secure zero-day exploited in the wild (CVE-2026-104935)Rapid7 Blog · 2026-10-13