Ivanti Connect Secure & Policy Secure Buffer Over-Read DoS (CVE-2025-5456)
CVE-2025-5456 Published on August 12, 2025
A buffer over-read vulnerability in Ivanti Connect Secure before 22.7R2.8 or 22.8R2, Ivanti Policy Secure before 22.7R1.5, Ivanti ZTA Gateway before 2.8R2.3-723 and Ivanti Neurons for Secure Access before 22.8R1.4 (Fix deployed on 02-Aug-2025) allows a remote unauthenticated attacker to trigger a denial of service. CWE-125
Vulnerability Analysis
CVE-2025-5456 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
Out-of-bounds Read
The software reads data past the end, or before the beginning, of the intended buffer. Typically, this can allow attackers to read sensitive information from other memory locations or cause a crash. A crash can occur when the code reads a variable amount of data and assumes that a sentinel exists to stop the read operation, such as a NUL in a string. The expected sentinel might not be located in the out-of-bounds memory, causing excessive data to be read, leading to a segmentation fault or a buffer overflow. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent read operation then produces undefined or unexpected results.
Products Associated with CVE-2025-5456
Want to know whenever a new CVE is published for Ivanti Connect Secure? stack.watch will email you.
Affected Versions
Ivanti Connect Secure:- Version 22.7R2.8 is unaffected.
- Version 22.8R2 is unaffected.
- Version 22.7R1.5 is unaffected.
- Version 2.8R2.3-723 is unaffected.
- Version 22.8R1.4 (Fix deployed on 02-Aug-2025) is unaffected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.