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Fencer Intel
critical 9.9

CVE-2020-3495 in the critical feed json

Cisco Jabber for Windows Message Handling Arbitrary Code Execution Vulnerability

published 6y ago modified 4mo ago also EUVD-2020-24766

cvss
9.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
60.5%
EPSS 60.5% chance of exploitation in 30 days, percentile 99.1%
public exploits
0
none known

Summary

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.

Patch / fix

  • cisco jabber 12.1.3, 12.5.2, 12.6.3, 12.7.2, 12.8.3, 12.9.1

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
last yr.

Exploit prediction

60.54% chance of exploitation in the next 30 days, higher than 99.1% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 9.9 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 9.0 AV:N/AC:L/Au:S/C:C/I:C/A:C

Affected products

  • Cisco Cisco Jabber

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.