Is CVE-2026-35058 in the CISA KEV catalog?

No. CVE-2026-35058 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-35058?

CVE-2026-35058 has a CVSS v4 base score of 6.9 (MEDIUM).

What is the EPSS score for CVE-2026-35058?

CVE-2026-35058 has an EPSS score of 0.32% (24th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-35058?

Upgrade openvpn on debian 11 to 2.5.1-3+deb11u3 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2026-35058

MEDIUM

6.9

CVSS v4

NVD

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.

CWE-617

How to fix

Remediation Available

openvpnDebian

Fixed in:2.5.1-3+deb11u3CVE-2026-35058

Fixed in:2.6.14-0+deb12u1CVE-2026-35058

Fixed in:2.6.14-1+deb13u2CVE-2026-35058

Fixed in:2.7.2-1CVE-2026-35058

openvpnUbuntu

Fixed in:2.5.11-0ubuntu0.22.04.3USN-8286-1

Fixed in:2.6.19-0ubuntu0.24.04.2USN-8286-1

Fixed in:2.6.19-0ubuntu0.25.10.2USN-8286-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v4 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredLow

Impact

CVSS: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

Exploit Intelligence

0.32%probability of exploitation in 30 days

24thpercentile

Low risk: more likely to be exploited than 24% of all known CVEs.

References

Other references4

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-17.