What is CVE-2026-20125?

CVE-2026-20125 is a high-severity vulnerability in Cisco Ios Xe Software, classified under CWE-228. CVSS score: 7.7/10. Published 2026-03-25.

How severe is CVE-2026-20125?

High severity. CVSS v3 base score is 7.7 out of 10.

Vulnerability in Cisco Ios Xe Software

CVE-2026-20125

A vulnerability in the HTTP Server feature of Cisco IOS Software and Cisco IOS XE Software Release 3E could allow an authenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS)…

EPSS: 0.002 (42.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H.

Affected products

Cisco Ios Xe Software — versions 3.5.0E, 3.5.1E, 3.5.2E
Cisco Ios — versions 12.2(33)CY, 12.2(33)CY1, 12.2(33)CY2

Weakness classification (CWE)

CWE-228

References

cisco-sa-ios-http-dos-sbv8XRpL

Frequently asked questions

What is CVE-2026-20125?: CVE-2026-20125 is a high-severity vulnerability in Cisco Ios Xe Software, classified under CWE-228. CVSS score: 7.7/10. Published 2026-03-25.
How severe is CVE-2026-20125?: High severity. CVSS v3 base score is 7.7 out of 10.