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CVE-2026-13698· NVD / CVE Program· CNA OpenVPN

A memory leak in OpenVPN version 2.5.0 through 2.5.11, 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers with a vali

Noroxi assessment

Priority: Monitor (action score 24/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.54% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No special conditions are required; it is repeatable.
  • Fixed version: openvpn (Alpine:v3.24) 2.7.5-r0; openvpn (Debian:12) 2.6.14-0+deb12u2; openvpn (Debian:13) 2.6.14-1+deb13u3.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to openvpn (Alpine:v3.24) 2.7.5-r0; openvpn (Debian:12) 2.6.14-0+deb12u2; openvpn (Debian:13) 2.6.14-1+deb13u3 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A memory leak in OpenVPN version 2.5.0 through 2.5.11, 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers with a valid tls-crypt-v2 client key to potentially cause a denial of service

MediumCVSS 6.0 · v4.0—No exploit Fix available
Published
Jul 6, 2026
Updated
Jul 9, 2026
EPSS
0.5% · 44th percentile

Report tools

JSON

Action score

24

Monitor

Low priority for now.

CVSS
24 / 40 · 6.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.5%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · OpenVPN
6.0
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-13698

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
openvpnopenvpn

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • openvpn openvpn2.5.0 and later · up to 2.5.11 inclusive
  • openvpn openvpn2.6.0 and later · before 2.6.21
  • openvpn openvpn2.7 and later · before 2.7.5

Versions reported by the vendor

Affected version ranges reported by the assigning authority (OpenVPN). Independent of NVD's CPE analysis and usually ahead of it.

  • OpenVPN OpenVPN

    • 2.5.0 and later · up to and including 2.5.11affected · semver
    • 2.6.0 and later · up to and including 2.6.20affected · semver
    • 2.7_alpha1 and later · up to and including 2.7.4affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Alpine:v3.24openvpnfrom 2.5.0 · before 2.7.5-r02.7.5-r0
Debian:12openvpnbefore 2.6.14-0+deb12u22.6.14-0+deb12u2
Debian:13openvpnbefore 2.6.14-1+deb13u32.6.14-1+deb13u3
Debian:14openvpnbefore 2.7.5-12.7.5-1
openSUSE:Leap 16.0openvpnbefore 2.6.10-160000.4.12.6.10-160000.4.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7openvpnbefore 2.6.10-150600.3.23.12.6.10-150600.3.23.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7openvpn-dcobefore 2.6.10-150600.3.23.12.6.10-150600.3.23.1

Same product

openvpn: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-27903OpenVPN plug-ins on Windows with OpenVPN 2.6.9 and earlier could be loaded from any directory, which allows an attacker to load an arbitrary
    42Plan
  • CVE-2023-46850Use after free in OpenVPN version 2.6.0 to 2.6.6 may lead to undefined behavoir, leaking memory buffers or remote execution when sending net
    40Plan
  • CVE-2022-0547OpenVPN 2.1 until v2.4.12 and v2.5.6 may enable authentication bypass in external authentication plug-ins when more than one of them makes u
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-35058Jun 8, 2026 · 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
    27Monitor
  • ← EarlierCVE-2026-40215Jun 8, 2026 · A race condition in OpenVPN 2.6.0 through 2.6.19 and 2.7_alpha1 through 2.7.1 allows remote attackers to potentially cause a server crash or
    24Monitor
  • Later →CVE-2026-13122Jul 6, 2026 · OpenVPN version 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers to cause a denial of service via a malformed authe
    23Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
alpine:openvpn2.7.5-r0 · Alpine:v3.24Package registry (OSV)
debian:openvpn2.6.14-0+deb12u2 · Debian:12Package registry (OSV)
opensuse:openvpn2.6.10-160000.4.1 · openSUSE:Leap 16.0Package registry (OSV)
suse:openvpn2.6.10-150600.3.23.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP7Package registry (OSV)
suse:openvpn-dco2.6.10-150600.3.23.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP7Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-1293224 days apartA memory leak in the tls-crypt-v2 client key extraction in OpenVPN 2.5.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers
    28Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
P
Scope
X

Weakness class (CWE)

CWE-401 · Missing Release of Memory after Effective Lifetime

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records