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VulnerabilityAwaiting classification

CVE-2026-40953

MEDIUM · 6.7 CVSS v4.0 Published 2026-07-15
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
69/100
Remediation priority · Elevated
Zero-click 6 weeks old

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
CVE-2026-40953 is a heap overflow in the certificate parsing function of Secure Access clients prior to 14.55. Attackers with local access and administrator permissions can create a denial of service attack against the client over which they have control.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

A heap overflow vulnerability exists in the certificate parsing function of Secure Access clients versions prior to 14.55. The vulnerability is triggered during certificate parsing and can be exploited by an attacker with local access and administrator-level permissions on the client system, leading to denial of service.

MitigationUpgrade Secure Access client software to version 14.55 or later to remediate this vulnerability. Organizations should verify current client versions and deploy the update through their standard patch management processes.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
High
Authentication
X
User interaction
None
Scope
X

CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify Secure Access client installation
    Locate the Secure Access client software on the system using system inventory tools or by checking common program installation directories
    Affected if Secure Access client is not found on the system, the vulnerability does not apply
  2. Determine installed Secure Access client version
    Use the system's software inventory, installed programs list, or vendor-provided version query command to obtain the exact version number of the Secure Access client
    Affected if The exact version cannot be determined, treat as potentially vulnerable
  3. Compare version against vulnerable threshold
    Compare the installed version number to the affected range: versions prior to 14.55 (such as 14.54, 14.x versions below 14.55, or earlier release lines)
    Affected if Installed version is below 14.55, the system falls within the vulnerable version range
  4. Verify client is actively used or configured
    Check if the Secure Access client service or background process is running, or if certificate handling features are enabled in the client configuration
    Affected if The client is installed but not actively running or certificate parsing is disabled, exploitation may not be feasible but the vulnerable code still exists

The environment is affected if the Secure Access client is installed and the running version is below 14.55, with the exploitation requiring local access and administrator-level permissions on the client system.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Upgrade Secure Access client software to version 14.55 or later to remediate this vulnerability. Organizations should verify current client versions and deploy the update through their standard patch management processes.

Recommended fix Moderate confidence

Secure Access client version 14.55 or later

  1. 1. Identify all systems running Secure Access clients in your environment
  2. 2. Verify the current version of each Secure Access client installation
  3. 3. For clients running versions prior to 14.55, download the Secure Access client version 14.55 or later from the vendor's official source
  4. 4. Test the upgrade in a non-production environment first to ensure compatibility
  5. 5. Apply the upgrade to production systems following your organization's change management process
  6. 6. Verify the upgrade was successful by checking the client version displays 14.55 or higher
Caveat Standard client upgrade considerations apply - review vendor release notes for any configuration or compatibility changes before deploying

Generated from the published advisory — verify against the referenced sources before acting.

Have this fixed Scoped from the published advisory
  • Consultation2.0 h
  • Implementation2.0 h
  • Testing2.0 h
  • Review / QA1.0 h
7.0 hours of engineering $1,240
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-40953 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data