Zero-day vulnerability in Ivanti Connect Secure (formerly Pulse Connect Secure)

Stack-based buffer overflow
CVE-2025-0282

Vulnerability details

Advisory: SB2025010871 - Multiple vulnerabilities in Ivanti Connect Secure

Vulnerable component: Ivanti Connect Secure (formerly Pulse Connect Secure)

CVE-ID: CVE-2025-0282

CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C

CWE-ID: CWE-121 - Stack-based buffer overflow

Description:

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when handling untrusted input. A remote unauthenticated attacker can send specially crafted packets to the system, trigger a stack-based buffer overflow and execute arbitrary code on the target system.

Note, the vulnerability is being actively exploited in the wild against Ivanti Connect Secure instances.

External links:

https://forums.ivanti.com/s/article/Security-Advisory-Ivanti-Connect-Secure-Policy-Secure-ZTA-Gateways-CVE-2025-0282-CVE-2025-0283

About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.