VulnerabilityAdded to KEV 30 Oct 2026

CVE-2026-118527: Ivanti Connect Secure Generation of Predictable Numbers or Identifiers Vulnerability

Affects Ivanti Connect SecureSource CISA KEV

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Mentioned vulnerabilities

Exploited in the wild · KEV due 13 Nov 2026 : apply the vendor's fix or mitigations to Ivanti Connect Secure now.

Data as of 31 Oct 2026, 02:22 UTC

Exploitation

Actively exploited

High severity · CVSS not yet scored by NVD

KEV deadline: 13 Nov 2026 US federal agencies must patch by this date; a sensible deadline for everyone else. Other KEV due dates

Exploitation evidence

No cve.org publication date on record, so no t = 0

Disclosed: evidence found.
Public on cve.org; its publication date is not in this record
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: evidence found.
Listed in CISA KEV on 30 Oct 2026
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

Added to CISA KEV (opens in a new tab)
exploitation confirmed
30 Oct 2026
KEV remediation due
US federal deadline
13 Nov 2026

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CISA KEV (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

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.

Check the firmware or software version for Ivanti Connect Secure in the device's admin interface against the vendor advisory.

Description

Ivanti Connect Secure has a vulnerability involving the generation of predictable numbers or identifiers that enables a remote authenticated attacker to upload files with attacker-controlled content to a known disk location. This vulnerability can be combined with other vulnerabilities (CVE-2026-104935 and CVE-2026-111357) to potentially escalate impact. It is known to be exploited in the wild.

Impact

The vulnerability allows remote authenticated attackers to place attacker-controlled files on the system in predictable locations, which could facilitate further attacks when chained with other vulnerabilities. Exploitation in the wild is confirmed, indicating active threat. The exact impact depends on the use of chained vulnerabilities but includes unauthorized file upload and potential system compromise.

Mitigation

Until then, limit remote authenticated access to trusted users and monitor for suspicious activity related to file uploads.

Summary

CVE-2026-118527 is a vulnerability in Ivanti Connect Secure where predictable numbers or identifiers are generated. This flaw allows a remote attacker with authentication to upload malicious files to a known location on the system. The vulnerability can be chained with CVE-2026-104935 and CVE-2026-111357 for further exploitation. It has been added to the CISA KEV catalog and is confirmed to be exploited in the wild.

CWE-340Generation of Predictable Numbers or Identifiers (opens in a new tab)
Class weaknessOWASP Top 10 A04:2025: Cryptographic Failures (opens in a new tab)
The product uses a scheme that generates numbers or identifiers that are more predictable than required.
OWASP Cheat Sheets
Forgot Password (opens in a new tab)
Transport Layer Protection (opens in a new tab)
User Privacy Protection (opens in a new tab)
Password Storage (opens in a new tab)
Cryptographic Storage (opens in a new tab)
OWASP ASVS 4.0.3
V2.3.1 (opens in a new tab)
V2.6.2 (opens in a new tab)
V2.7.6 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

Community reviews

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Exploitation evidence

Timeline

What to do

Description

AI analysisMachine-generated, updated 31 Oct 2026, 02:22 UTC

WeaknessesCWE-340

Technical details

References

Community reviews

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