# CVE-2026-40953: Absolute Security Secure Access heap overflow in certificate parsing

Source: https://junglewise.ai/threats/cve-2026-40953-absolute-security-secure-access-heap-overflow-in-certificate  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-15. Updated: 2026-07-15  
License: CC BY 4.0 with a link back

CVE-2026-40953 · Severity: info · CVSS 6.7 · Published 2026-07-15

Absolute Security Secure Access is a client application used to provide secure remote connectivity for mobile workers. A vulnerability in how the software processes security certificates could allow a user who already has administrative access to the device to crash the connection client. While this results in a denial of service for that specific user, it requires high-level local permissions to execute.

Technologies: [Absolute Security Secure Access](https://junglewise.ai/threats/technologies/secure-access). Vendors: [Absolute Security](https://junglewise.ai/threats/vendors/absolute-security).

## Quick answers

**Is CVE-2026-40953 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-40953 being exploited in the wild.

**How severe is CVE-2026-40953?** Informational severity, with a CVSS score of 6.7, published 15 July 2026.

**Which products and versions are affected?** Absolute Security Secure Access prior to 14.55.

**Is there a fix for CVE-2026-40953?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-40953 attacked?** It is attacked with local access, in a network appliance.

**Am I affected by CVE-2026-40953?** Check whether you run Absolute Security Secure Access at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A heap-based buffer overflow exists in the certificate parsing function of Absolute Security (formerly NetMotion) Secure Access clients. The vulnerability is triggered when the client processes a specially crafted certificate. An attacker must have local access to the machine and possess administrator-level privileges to exploit this flaw. Successful exploitation results in a denial of service (DoS) by crashing the Secure Access client. The issue is resolved in client versions 14.55 and later.

## Affected products

- Absolute Security (formerly NetMotion) Secure Access prior to 14.55

## Timeline

- 2026-07-15: advisory
- 2026-07-15: disclosed

## References

- [https://www.absolute.com/platform/security-information/vulnerability-archive/cve-2026-40953](https://www.absolute.com/platform/security-information/vulnerability-archive/cve-2026-40953)

## Related threats

- [Absolute Security Secure Access resource exhaustion in publisher](https://junglewise.ai/threats/cve-2026-55399-absolute-security-secure-access-resource-exhaustion-in-publisher)
- [Absolute Security Secure Access memory management denial of service](https://junglewise.ai/threats/cve-2026-55398-absolute-security-secure-access-memory-management-denial-of)
- [Absolute Security Secure Access memory management DoS in server](https://junglewise.ai/threats/cve-2026-33445-absolute-security-secure-access-memory-management-dos-in-server)
- [Absolute Security Secure Access memory management DoS](https://junglewise.ai/threats/cve-2026-33444-absolute-security-secure-access-memory-management-dos)
- [Absolute Security Secure Access input validation error in client tunnel protocol](https://junglewise.ai/threats/cve-2026-40958-absolute-security-secure-access-input-validation-error-in-client)