CVE-2025-15497: openvpn Reachable Assertion
CVSS: 3.8v4.0LowDeferred
AliasesDEBIAN-CVE-2025-15497
Published 30-01-2026Last modified 30-01-2026
Vulnerability summary
CVE-2025-15497 is a low (CVSS 3.8) Reachable Assertion vulnerability in openvpn. EPSS estimates a 0.36% chance of exploitation in the next 30 days, higher than 28.7% of scored vulnerabilities.
CVSS score
3.8/10
010
Low · v4.0 (CVE.org)EPSS score
0.36%
0%100%
Low · +0.02 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 30-01-2026PublishedVulnerability first disclosed.
- 30-01-2026Last modifiedVulnerability information updated.
Description
Insufficient epoch key slot processing in OpenVPN 2.7_alpha1 through 2.7_rc5 allows remote authenticated users to trigger an assert resulting in a denial of service
CVSS metrics
3 scores · 3 sources · 1 versionLow 3.8Preferred score · CVE.org (CNA)
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:USources3 sources · 3.8–7.0
- OSV · DebianEcosystem advisory · calculated7.0HighCVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XDiffers
- NVDNIST3.8LowCVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS trend
Probability
0.36%
Chance of exploitation in the next 30 days
Percentile
29%
Versus all other CVEs
30-day change
+0.02 pp
From 0.34% on 20-09-2026
20-09-202620-10-2026
EPSS score0.36%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian1 product
- openvpn< 2.7.0~rc5-1
Openvpn1 product
- openvpn≥ 2.7_alpha1, ≤ 2.7_rc5
2 vendors · 2 products
