What is CVE-2021-1403?

CVE-2021-1403 is a high-severity vulnerability in Cisco Ios Xe Software, classified under Insufficient Verification of Data Authenticity. CVSS score: 7.4/10. Published 2021-03-24.

How severe is CVE-2021-1403?

High severity. CVSS v3 base score is 7.4 out of 10.

Vulnerability in Cisco Ios Xe Software

CVE-2021-1403

A vulnerability in the web UI feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to conduct a cross-site WebSocket hijacking (CSWSH) attack and cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient HTTP protections in the web UI on an affected device. An attacker could exploit this vulnerability by persuading an authenticated user of the web UI to follow a crafted link. A successful exploit could allow the attacker to corrupt memory on the affected device, forcing it to reload and causing a DoS condition.

EPSS: 0.006 (45.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H.

Affected products

Cisco Ios Xe Software — versions n/a
Cisco Ios_xe — versions 3.15.1xbs, 3.15.2xbs, 16.3.1

Weakness classification (CWE)

References

psirt@cisco.com (x_refsource_CISCO, vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2021-1403?: CVE-2021-1403 is a high-severity vulnerability in Cisco Ios Xe Software, classified under Insufficient Verification of Data Authenticity. CVSS score: 7.4/10. Published 2021-03-24.
How severe is CVE-2021-1403?: High severity. CVSS v3 base score is 7.4 out of 10.