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CVE-2020-3495

57
FAUCET Score

CVE-2020-3495 is a critical vulnerability in Cisco Jabber for Windows that allows an authenticated, remote attacker to execute arbitrary code. This flaw stems from improper validation of Extensible Messaging and Presence Protocol (XMPP) message contents. With a CVSS score of 8.8 (HIGH), successful exploitation could lead to arbitrary code execution with the privileges of the Jabber client user. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion and media coverage, indicating awareness and potential for future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
>= 12.1, < 12.1.3CPE matchmatch criteria
cpe:2.3:a:cisco:jabber:*:*:*:*:*:windows:*:*
>= 12.5, < 12.5.2CPE matchmatch criteria
cpe:2.3:a:cisco:jabber:*:*:*:*:*:windows:*:*
>= 12.6, < 12.6.3CPE matchmatch criteria
cpe:2.3:a:cisco:jabber:*:*:*:*:*:windows:*:*
>= 12.7, < 12.7.2CPE matchmatch criteria
cpe:2.3:a:cisco:jabber:*:*:*:*:*:windows:*:*
>= 12.8, < 12.8.3CPE matchmatch criteria
cpe:2.3:a:cisco:jabber:*:*:*:*:*:windows:*:*

CVSS Data

CVSS version used by this source: 3.1

9.9CRITICAL

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.1
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
62.12%
Probability of exploitation in next 30 days
EPSS Percentile
99.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.6212 is in the 99th percentile among its peer group of 17,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-jabber-UyTKCPGg
Vendor Advisory