What is CVE-2020-3516?

CVE-2020-3516 is a medium-severity vulnerability in Cisco iOS Xe Software, classified under Improper Input Validation. CVSS score: 4.3/10. Published 2020-09-24.

How severe is CVE-2020-3516?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Improper input validation in Cisco iOS Xe Software

CVE-2020-3516

A vulnerability in the web server authentication of Cisco IOS XE Software could allow an authenticated, remote attacker to crash the web server on the device. The vulnerability is due to insufficient input validation during authentication. An attacker could exploit this vulnerability by entering unexpected characters during a valid authentication. A successful exploit could allow the attacker to crash the web server on the device, which must be manually recovered by disabling and re-enabling the web server.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.017 (74.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

Affected products

Cisco Ios Xe Software — versions n/a
Cisco Ios_xe — versions 17.2.1

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

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

Frequently asked questions

What is CVE-2020-3516?: CVE-2020-3516 is a medium-severity vulnerability in Cisco iOS Xe Software, classified under Improper Input Validation. CVSS score: 4.3/10. Published 2020-09-24.
How severe is CVE-2020-3516?: Medium severity. CVSS v3 base score is 4.3 out of 10.