# CVE-2026-84015: Remote Access Point-to-Point Protocol heap overflow in EAP-TLS

Source: https://junglewise.ai/threats/cve-2026-84015-heap-based-buffer-overflow-in-remote-access-point-to-point  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-84015 · Severity: critical · CVSS 9.8 · Published 2026-10-13

A heap-based buffer overflow exists in the EAP-TLS authentication component of Point-to-Point Protocol (PPP), which is used for remote access and dial-up connections. An attacker on the network can exploit this vulnerability to execute arbitrary code on affected systems without authentication, potentially gaining complete control of the remote access infrastructure.

Technologies: [<UNKNOWN>](https://junglewise.ai/threats/technologies/x-unknown).

## Quick answers

**Is CVE-2026-84015 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-84015 being exploited in the wild.

**How severe is CVE-2026-84015?** Critical severity, with a CVSS score of 9.8, published 13 October 2026.

**Which products and versions are affected?** <UNKNOWN> <UNKNOWN>.

**Is there a fix for CVE-2026-84015?** 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-2026-84015 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2026-84015?** Check whether you run <UNKNOWN> 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 vulnerability exists in the EAP-TLS authentication handler within PPP remote access implementations, allowing remote code execution with network-level access. The vulnerability requires no authentication or user interaction, making it directly exploitable by any network-adjacent attacker. Successful exploitation grants arbitrary code execution on the vulnerable system.

## Affected products

- <UNKNOWN> <UNKNOWN>

## Timeline

- 2026-10-13: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-84015](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-84015)

## Related threats

- [System component denial of service vulnerability](https://junglewise.ai/threats/cve-2026-95784-a-vulnerability-exists-in-a-system-component-that-may-under)
- [Hessian remoting authentication bypass with non-root context path](https://junglewise.ai/threats/cve-2026-97874-when-hessian-remoting-is-configured-with-basic-authentication-the)
- [Embedded server weak session ID generation](https://junglewise.ai/threats/cve-2026-111259-the-embedded-server-generates-http-session-identifiers-with-a)
- [Web application request routing security constraint bypass](https://junglewise.ai/threats/cve-2026-111258-the-optional-request-routing-feature-forwards-requests-to-their)
- [SSH administration service authentication bypass](https://junglewise.ai/threats/cve-2026-111239-the-optional-ssh-administration-service-grants-full-access-to)