CVE-2026-118527

MEDIUM CVSS 4.3 PoC Available
Published: 2026-11-03
Modified: 2026-11-03
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AI Threat Summary

CVE-2026-118527 is a moderate vulnerability affecting Connect Secure. Threat hunters should monitor for exploit attempts and apply vendor patches immediately.

Description

Use of predictable filenames in Ivanti Connect Secure before versions 25.1.1.3 and 22.8R2.6 allows a remote authenticated attacker to upload files with attacker-controlled content to a known location on disk.

Attack Chain
1
Reconnaissance

Attacker scans for vulnerable versions using version banners or PoC scanners

2
Initial Access

Attacker triggers CVE-2026-118527 vulnerability with a crafted request or payload

3
Execution

Vulnerability exploited to perform unauthorized actions on the target system

4
Impact

Depending on vulnerability type, attacker achieves data access, service disruption, or code execution

MITRE ATT&CK Techniques
T1190 Exploit Public-Facing Application
Initial Access

Public-facing application vulnerability exploited for initial access

T1203 Exploitation for Client Execution
Execution

Vulnerability exploited to execute attacker-controlled code

Indicators of Compromise
Type Value Description
user_agent Mozilla/5.0 (compatible; exploit/1.0) Generic exploit scanner user agent pattern
url /api/vuln-endpoint?payload=<malicious> Exploit attempt against Connect Secure endpoint — monitor access logs for anomalous params
Remediation
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.
Quick Facts
CVE ID CVE-2026-118527
CVSS Score 4.3
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Published 2026-11-03
Exploited Yes
CISA KEV Yes
PoC Available
Affected Products
  • ivanti / connect_secure
  • ivanti / connect_secure 22.8
  • ivanti / connect_secure 22.8
  • ivanti / connect_secure 22.8
  • ivanti / connect_secure 22.8
  • ivanti / connect_secure 22.8
  • ivanti / connect_secure 22.8
References
External Resources
NVD Entry BleepingComputer The Hacker News