How severe is CVE-2025-5456?

CVE-2025-5456 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-5456 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-5456?

CVE-2025-5456 primarily affects Ivanti Connect Secure. In total, 29 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-5456?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-5456 have an EU (EUVD) identifier?

Yes. CVE-2025-5456 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-24254.

When was CVE-2025-5456 published?

CVE-2025-5456 was published on 2025-08-12 and last updated on 2026-06-17.

CVE-2025-5456

CVE-2025-5456 is a high-severity vulnerability in Ivanti Connect Secure with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-24254
Weakness: CWE-125
Affected product: Ivanti Connect Secure
Published: 2025-08-12
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2025-5456?: 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
How severe is CVE-2025-5456?: CVE-2025-5456 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-5456 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-5456?: CVE-2025-5456 primarily affects Ivanti Connect Secure. In total, 29 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-5456?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-5456 have an EU (EUVD) identifier?: Yes. CVE-2025-5456 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-24254.
When was CVE-2025-5456 published?: CVE-2025-5456 was published on 2025-08-12 and last updated on 2026-06-17.

References

https://forums.ivanti.com/s/article/August-Security-Advisory-Ivanti-Connect-Secure-Policy-Secure-ZTA-Gateways-Multiple-CVEs?language=en_US

Affected products (29)

cpe:2.3:a:ivanti:connect_secure:*:*:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:22.7:-:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:22.7:r1:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:22.7:r1.1:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:22.7:r1.2:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:22.7:r1.3:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:22.7:r1.4:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:22.7:r1.5:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:22.7:r2:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:22.7:r2.1:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:22.7:r2.2:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:22.7:r2.3:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:22.7:r2.4:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:22.7:r2.5:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:22.7:r2.6:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:22.7:r2.7:*:*:*:*:*:*
cpe:2.3:a:ivanti:policy_secure:*:*:*:*:*:*:*:*
cpe:2.3:a:ivanti:policy_secure:22.7:-:*:*:*:*:*:*
cpe:2.3:a:ivanti:policy_secure:22.7:r1:*:*:*:*:*:*
cpe:2.3:a:ivanti:policy_secure:22.7:r1.1:*:*:*:*:*:*
cpe:2.3:a:ivanti:policy_secure:22.7:r1.2:*:*:*:*:*:*
cpe:2.3:a:ivanti:policy_secure:22.7:r1.3:*:*:*:*:*:*
cpe:2.3:a:ivanti:policy_secure:22.7:r1.4:*:*:*:*:*:*
cpe:2.3:a:ivanti:zero_trust_access_gateway:22.8:r2.2:*:*:*:*:*:*
cpe:2.3:a:ivanti:neurons_for_secure_access:*:*:*:*:*:*:*:*
cpe:2.3:a:ivanti:neurons_for_secure_access:22.8:r1:*:*:*:*:*:*
cpe:2.3:a:ivanti:neurons_for_secure_access:22.8:r1.1:*:*:*:*:*:*
cpe:2.3:a:ivanti:neurons_for_secure_access:22.8:r1.2:*:*:*:*:*:*
cpe:2.3:a:ivanti:neurons_for_secure_access:22.8:r1.3:*:*:*:*:*:*

More vulnerabilities in Ivanti Connect Secure

CVE-2021-22893 — Critical (CVSS 10.0): Pulse Connect Secure 9.0R3/9.1R1 and higher is vulnerable to an authentication bypass vulnerability exposed by the…
CVE-2019-11510 — Critical (CVSS 10.0): In Pulse Secure Pulse Connect Secure (PCS) 8.2 before 8.2R12.1, 8.3 before 8.3R7.1, and 9.0 before 9.0R3.4, an…
CVE-2016-4787 — Critical (CVSS 10.0): Pulse Connect Secure (PCS) 8.2 before 8.2r1, 8.1 before 8.1r2, 8.0 before 8.0r10, and 7.4 before 7.4r13.4 allow remote…
CVE-2025-22467 — Critical (CVSS 9.9): A stack-based buffer overflow in Ivanti Connect Secure before version 22.7R2.6 allows a remote authenticated attacker…
CVE-2024-21894 — Critical (CVSS 9.8): A heap overflow vulnerability in IPSec component of Ivanti Connect Secure (9.x, 22.x) and Ivanti Policy Secure allows…
CVE-2018-20813 — Critical (CVSS 9.8): An input validation issue has been found with login_meeting.cgi in Pulse Secure Pulse Connect Secure 8.3RX before 8.3R2.

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CVE-2017-14451 — Critical (CVSS 10.0): An exploitable out-of-bounds read vulnerability exists in libevm (Ethereum Virtual Machine) of CPP-Ethereum. A…
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