What is CVE-2020-3495?

CVE-2020-3495 is a critical-severity vulnerability in Cisco Jabber, classified under Improper Input Validation. CVSS score: 9.9/10. Published 2020-09-04.

How severe is CVE-2020-3495?

Critical severity. CVSS v3 base score is 9.9 out of 10.

Is CVE-2020-3495 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Improper input validation in Cisco Jabber

CVE-2020-3495

A vulnerability in Cisco Jabber for Windows could allow an authenticated, remote attacker to execute arbitrary code. The vulnerability is due to improper validation of message contents. An attacker could exploit this vulnerability by sending specially crafted Extensible Messaging and Presence Protocol (XMPP) messages to the affected software. A successful exploit could allow the attacker to cause the application to execute arbitrary programs on the targeted system with the privileges of the user account that is running the Cisco Jabber client software, possibly resulting in arbitrary code execution.

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

EPSS: 0.599 (99.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Cisco Jabber — versions n/a
Cisco Jabber

Weakness classification (CWE)

CWE-20 — Improper Input Validation

Public proof-of-concept exploits

References

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

Frequently asked questions

What is CVE-2020-3495?: CVE-2020-3495 is a critical-severity vulnerability in Cisco Jabber, classified under Improper Input Validation. CVSS score: 9.9/10. Published 2020-09-04.
How severe is CVE-2020-3495?: Critical severity. CVSS v3 base score is 9.9 out of 10.
Is CVE-2020-3495 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.