CVE-2026-20125

At a glance

Severity
HIGH 7.7
EPSS
EPSS 0.29 % · percentile 22 (2026-10-27)
State
PUBLISHED
Published
Updated
Assigner
cisco
NVD status
Awaiting Analysis

Description

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) condition. This vulnerability is due to improper validation of user-supplied input. An attacker could exploit this vulnerability by sending malformed HTTP requests to an affected device. A successful exploit could allow the attacker to cause a watchdog timer to expire and the device to reload, resulting in a DoS condition. To exploit this vulnerability, the attacker must have a valid user account.

Scores

VersionScoreVectorScored by
CVSS 3.1HIGH 7.7CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:Hcisco
CVSS 3.1HIGH 7.7CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:HNVD · psirt@cisco.com (Secondary)

Weaknesses (CWE)

European references

CERT-FR advisories

Affected products

ProductVersions
Cisco · IOSaffected 12.2(33)CY ; affected 12.2(33)CY1 ; affected 12.2(33)CY2 ; affected 12.2(55)SE ; affected 12.2(55)SE3 ; affected 12.2(55)SE2
Cisco · Cisco IOS XE Softwareaffected 3.5.0E ; affected 3.5.1E ; affected 3.5.2E ; affected 3.5.3E ; affected 3.11.1S ; affected 3.11.2S

References

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD