Is CVE-2026-115680 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-115680 being exploited in the wild.

How severe is CVE-2026-115680?

Informational severity, published 26 October 2026.

Which products and versions are affected?

Arm Keil MDK-Middleware 8.0.0 to 8.3.0.

Is there a fix for CVE-2026-115680?

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-2026-115680 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-115680?

Check whether you run Arm Keil MDK-Middleware 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.

CVE-2026-115680: Arm Keil MDK-Middleware DHCPv6 option over-read and data retransmission

CVE-2026-115680 · Severity: info · Published 2026-10-26

Arm Keil MDK-Middleware, a software development toolkit for embedded systems and networking applications, contains vulnerabilities in its DHCPv6 (IPv6 DHCP) implementation. These flaws could allow an attacker to read memory beyond expected bounds or cause unintended network traffic, potentially exposing sensitive data or disrupting network operations.

Technologies: Arm Keil MDK-Middleware. Vendors: Arm.

Quick answers

Is CVE-2026-115680 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-115680 being exploited in the wild.
How severe is CVE-2026-115680?: Informational severity, published 26 October 2026.
Which products and versions are affected?: Arm Keil MDK-Middleware 8.0.0 to 8.3.0.
Is there a fix for CVE-2026-115680?: 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-2026-115680 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-115680?: Check whether you run Arm Keil MDK-Middleware 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

The vulnerability involves improper bounds checking during DHCPv6 option parsing, allowing an over-read of memory when processing malformed DHCPv6 packets. Additionally, the implementation may retransmit unintended data over the network. Both issues could be triggered by a remote attacker sending crafted DHCPv6 packets on the network without authentication.

Affected products

Arm Keil MDK-Middleware 8.0.0 to 8.3.0

Timeline

2026-10-26: disclosed

References

https://support.arm.com/documentation/112560

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