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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.006 (46.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 46.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Cisco iOS Xe Software
- Cisco iOS Xe — versions 3.15.1xbs, 3.15.2xbs, 16.3.1
Weakness classification (CWE)
References
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-cs… (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.