CVE-2026-35058: openvpn Reachable Assertion
CVSS: 6.9v4.0MediumAnalyzed
AliasesALPINE-CVE-2026-35058UBUNTU-CVE-2026-35058DEBIAN-CVE-2026-35058
Published 08-06-2026Last modified 08-06-2026
Vulnerability summary
CVE-2026-35058 is a medium (CVSS 6.9) Reachable Assertion vulnerability in openvpn. EPSS estimates a 0.60% chance of exploitation in the next 30 days, higher than 47.8% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
6.9/10
010
Medium · v4.0 (CVE.org)EPSS score
0.60%
0%100%
Low · +0.06 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Advisory lineage
Upstream 0 · Downstream 3 · Related 3Timeline
- 08-06-2026PublishedVulnerability first disclosed.
- 08-06-2026Last modifiedVulnerability information updated.
Description
Improper validation of packet length during tls-crypt-v2 key extraction in OpenVPN 2.6.0 through 2.6.19 and 2.7_alpha1 through 2.7.1 allows authenticated attackers to trigger a fatal assertion and cause a denial of service via a specially crafted packet.
CVSS metrics
7 scores · 5 sources · 2 versionsMedium 6.9Preferred score · CVE.org (CNA)
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated6.9MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H
- NVDNIST6.9MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/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
Medium 6.5Preferred score · OSV · Alpine (Ecosystem advisory) · calculated from vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HSourcesAll 4 agree
- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- NVDNIST6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.60%
Chance of exploitation in the next 30 days
Percentile
48%
Versus all other CVEs
30-day change
+0.06 pp
From 0.54% on 20-09-2026
20-09-202620-10-2026
EPSS score0.60%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (talosintelligence.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Alpine1 product
- openvpn≥ 2.6.0, < 2.6.20-r0
Debian1 product
- openvpn< 2.6.14-0+deb12u1 | < 2.6.14-1+deb13u2 | < 2.7.2-1
Openvpn1 product
- openvpn≥ 2.6.0, ≤ 2.6.19 | ≥ 2.7_alpha1, ≤ 2.7.1 | ≥ 2.6.0, < 2.6.20 | ≥ 2.7, < 2.7.2
Ubuntu1 product
- openvpnAll versions (No fix recorded) | < 2.5.11-0ubuntu0.22.04.3 | < 2.6.19-0ubuntu0.24.04.2 | < 2.6.19-0ubuntu0.25.10.2 | < 2.7.0-1ubuntu1.1
4 vendors · 4 products
References
9 links- community.openvpn.net/ReleaseHistoryRelease Notes
- community.openvpn.net/ReleaseHistoryRelease Notes
- www.talosintelligence.com/vulnerability_reports/TALOS-2026-2381ExploitMitigationThird Party Advisory
