PT-2025-20261 · Cisco · Cisco Ios Xe

Published 2025-05-07 · Updated 2025-08-05 · CVE-2025-20189

Positive Technologies (AI Summary)

CVSS v3.1

7.4

High

Base vector

AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Cisco IOS XE Software for Cisco ASR 903 Aggregation Services Routers with Route Switch Processor 3 (RSP3C) (affected versions not specified)

Description A vulnerability in the Cisco Express Forwarding functionality could allow an unauthenticated, adjacent attacker to trigger a denial of service (DoS) condition due to improper memory management when processing Address Resolution Protocol (ARP) messages. An attacker could exploit this by sending crafted ARP messages at a high rate over a period of time to an affected device, exhausting system resources and triggering a reload of the active route switch processor (RSP).

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Weakness Enumeration

CWE-762

Related Identifiers

BDU:2025-10333

CVE-2025-20189

Affected Products

Cisco Ios Xe

References · 6

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asr903-rsp3-arp-dos-WmfzdvJZ · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-20189 · Security Note
• https://osv.dev/vulnerability/CVE-2025-20189 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-10333 · Security Note
• https://twitter.com/CVEnew/status/1920246410210840621 · Twitter Post
• https://t.me/cveNotify/130920 · Telegram Post