CVE-2026-118527 Ivanti Connect Secure: software flaw
In plain words: A mistake in the software that attackers have found a way to abuse. Depends on the product — see the description and the vendor advisory.
Confirmed exploited by CISA on · US federal patch deadline Nov 13, 2026
What to do
- Install Ivanti's security update for Connect Secure. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Patch edge devices first — attackers often start scanning for them within hours of a fix.
- Never expose the device's admin page to the internet.
- After patching a device that was exposed, follow the vendor's compromise checks, end active sessions and change passwords.
Who is affected
Work IT. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.
What's at risk: They face the internet and guard the whole network, so a flaw here can hand attackers a way in — and these devices usually run no antivirus, so break-ins go unnoticed.
The details
- Official name
- Ivanti Connect Secure Generation of Predictable Numbers or Identifiers Vulnerability
- Product
- Ivanti Connect Secure
- CISA description
- Ivanti Connect Secure contains a generation of predictable numbers or identifiers vulnerability that allows a remote authenticated attacker to upload files with attacker-controlled content to a known location on disk. This vulnerability can be chained with CVE-2026-104935 and CVE-2026-111357.
- Type of flaw
- Software flaw (CWE-340)
- Confirmed exploited
- Oct 30, 2026
- US federal patch deadline
- Nov 13, 2026
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Answering about CVE-2026-118527 ·
Questions about CVE-2026-118527
Is CVE-2026-118527 being exploited?
Yes. CISA added CVE-2026-118527 to its Known Exploited Vulnerabilities catalog on Oct 30, 2026, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2026-118527?
Install Ivanti's security update for Connect Secure. If no update exists, follow the vendor's workaround or stop using the product until one ships. Patch edge devices first — attackers often start scanning for them within hours of a fix.
Am I affected by CVE-2026-118527?
Only if you use Ivanti Connect Secure. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.