What is CVE-2025-20155?

CVE-2025-20155 is a medium-severity vulnerability in Cisco Ios Xe Software, classified under CWE-1287. CVSS score: 6.0/10. Published 2025-05-07.

How severe is CVE-2025-20155?

Medium severity. CVSS v3 base score is 6.0 out of 10.

Vulnerability in Cisco Ios Xe Software

CVE-2025-20155

A vulnerability in the bootstrap loading of Cisco IOS XE Software could allow an authenticated, local attacker to write arbitrary files to an affected system. This vulnerability is due to insufficient input validation of the bootstrap file that is read by the system software when a device is first deployed in SD-WAN mode or when an administrator configures SD-Routing on the device. An attacker could exploit this vulnerability by modifying a bootstrap file generated by Cisco Catalyst SD-WAN Manager, loading it into the device flash, and then either reloading the device in a green field deployment in SD-WAN mode or configuring the device with SD-Routing. A successful exploit could allow the attacker to perform arbitrary file writes to the underlying operating system.

EPSS: 0.002 (5.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N.

Affected products

Cisco Ios Xe Software — versions 17.9.4, 17.9.5, 17.9.4a
Cisco Ios_xe — versions 17.9.4, 17.9.4a, 17.9.5

Weakness classification (CWE)

CWE-1287

References

psirt@cisco.com (Vendor Advisory)

Frequently asked questions

What is CVE-2025-20155?: CVE-2025-20155 is a medium-severity vulnerability in Cisco Ios Xe Software, classified under CWE-1287. CVSS score: 6.0/10. Published 2025-05-07.
How severe is CVE-2025-20155?: Medium severity. CVSS v3 base score is 6.0 out of 10.