CVE-2025-5451: ivanti connect_secure Stack-based Buffer Overflow
CVSS: 4.9v3.1MediumAnalyzed
Published 08-07-2025Last modified 08-07-2025
Vulnerability summary
CVE-2025-5451 is a medium (CVSS 4.9) Stack-based Buffer Overflow vulnerability in ivanti connect_secure. EPSS estimates a 0.70% chance of exploitation in the next 30 days, higher than 52.5% of scored vulnerabilities.
CVSS score
4.9/10
010
Medium · v3.1 (CVE.org)EPSS score
0.70%
0%100%
Low · +0.02 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 08-07-2025PublishedVulnerability first disclosed.
- 08-07-2025Last modifiedVulnerability information updated.
Description
A stack-based buffer overflow in Ivanti Connect Secure before version 22.7R2.8 and Ivanti Policy Secure before version 22.7R1.5 allows a remote authenticated attacker with admin rights to trigger a denial of service.
CVSS metrics
2 scores · 2 sources · 1 versionMedium 4.9Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:HSourcesAll 2 agree
- NVDNIST4.9MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.70%
Chance of exploitation in the next 30 days
Percentile
53%
Versus all other CVEs
30-day change
+0.02 pp
From 0.68% on 20-09-2026
20-09-202620-10-2026
EPSS score0.70%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-121Stack-based Buffer OverflowA stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
- CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.
Affected systems
Ivanti2 products
- connect_secure< 22.7 | 22.7 | 22.7:r1 | 22.7:r1.1 | 22.7:r1.2 | 22.7:r1.3 | 22.7:r1.4 | 22.7:r1.5 | 22.7:r2 | 22.7:r2.1 | 22.7:r2.2 | 22.7:r2.3 | 22.7:r2.4 | 22.7:r2.5 | 22.7:r2.6 | 22.7:r2.7
- policy_secure< 22.7 | 22.7 | 22.7:r1 | 22.7:r1.1 | 22.7:r1.2 | 22.7:r1.3 | 22.7:r1.4
1 vendor · 2 products
References
1 links- forums.ivanti.com/s/…Vendor Advisory