Buffer Over-read DoS in Ivanti Connect Secure, Policy Secure, ZTA Gateway, and Neurons for Secure Access
CVE-2025-5456 is a buffer over-read vulnerability in multiple Ivanti products: 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. The flaw is classified as CWE-125. Based on the provided content, the issue is reachable remotely without authentication and is associated with improper bounds checking during network data or protocol parsing, causing the software to read beyond the intended buffer boundary. Exploitation can destabilize or crash the affected appliance or service, resulting in denial of service.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
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Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An Ivanti vulnerability described as a buffer over-read, mentioned only as part of Ivanti's 2025 security history.
A high-severity buffer over-read vulnerability in Ivanti Connect Secure, Policy Secure, ZTA Gateway, and Neurons for Secure Access that can allow remote unauthenticated attackers to cause denial-of-service.
A buffer over-read vulnerability in multiple Ivanti security products that allows unauthenticated remote attackers to cause denial of service by crashing affected appliances.
A buffer over-read vulnerability that allows a remote unauthenticated attacker to trigger a denial of service in multiple Ivanti products.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.