# CVE-2026-101981: Juniper Networks Junos OS stack buffer overflow in rpd

Source: https://junglewise.ai/threats/cve-2026-101981-a-stack-based-buffer-overflow-vulnerability-in-the-routing  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-14. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-101981 · Severity: high · CVSS 8.8 · Published 2026-10-14

A buffer overflow vulnerability in the routing protocol daemon (rpd) component of Juniper Networks Junos OS and Junos OS Evolved can be exploited by adjacent LDP peers to crash the routing daemon or execute arbitrary code. An attacker with network access to the LDP protocol can cause router outage or gain control of the device's routing functions.

Technologies: [Juniper Networks Junos OS](https://junglewise.ai/threats/technologies/juniper-networks-junos-os), [Juniper Networks Junos OS Evolved](https://junglewise.ai/threats/technologies/junos-os-evolved). Vendors: [Juniper Networks](https://junglewise.ai/threats/vendors/juniper-networks).

## Quick answers

**Is CVE-2026-101981 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-101981 being exploited in the wild.

**How severe is CVE-2026-101981?** High severity, with a CVSS score of 8.8, published 14 October 2026.

**Which products and versions are affected?** Juniper Networks Junos OS; Juniper Networks Junos OS Evolved.

**Is there a fix for CVE-2026-101981?** 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-2026-101981 attacked?** It is attacked from the adjacent network, in an operating system.

**Am I affected by CVE-2026-101981?** Check whether you run Juniper Networks Junos OS or Juniper Networks Junos OS Evolved. 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 stack-based buffer overflow exists in the routing protocol daemon's LDP Label Mapping message handler. An unauthenticated adjacent network peer can trigger the vulnerability by sending a malformed LDP message, leading to rpd crash or code execution. The attack requires adjacent network access on the LDP protocol interface.

## Affected products

- Juniper Networks Junos OS
- Juniper Networks Junos OS Evolved

## Timeline

- 2026-10-14: disclosed

## References

- [https://supportportal.juniper.net/JSA112187](https://supportportal.juniper.net/JSA112187)

## Related threats

- [Juniper Networks Junos OS stack buffer overflow in BGP/EVPN](https://junglewise.ai/threats/cve-2026-101982-a-stack-based-buffer-overflow-vulnerability-in-the-routing)
- [Juniper Junos OS routing protocol daemon crash in ISO-VPN](https://junglewise.ai/threats/cve-2026-101952-an-improper-validation-of-consistency-within-input-vulnerability)
- [Juniper Networks Junos OS stack buffer overflow in BGP routing daemon](https://junglewise.ai/threats/cve-2026-102178-a-stack-based-buffer-overflow-vulnerability-in-the-bgp-routing)
- [Juniper Junos buffer overflow in SDK service process](https://junglewise.ai/threats/cve-2026-102176-a-buffer-copy-without-checking-size-of-input-classic-buffer)
- [Juniper Junos OS heap buffer overflow in sdxd daemon](https://junglewise.ai/threats/cve-2026-102175-a-heap-based-buffer-overflow-vulnerability-in-the-sdxd-service)