CVE-2020-3495
No exploitation reported by the sources we read.
- Published2020-09-04
- Fixed in12.9.1 · 12.8.3 · 12.7.2 · 12.6.3 · 12.5.2 · 12.1.3
- WeaknessCWE-20
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
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.
Timeline
dates in UTC- 2020-09-0403:15CVE publishedNVD
- 2026-10-2319:23EPSS crossed 10 %FIRST EPSS
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-3495?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-3495?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 12.9 | ≥ 12.9, < 12.9.1 | 12.9.1 | NVD |
| 12.8 | ≥ 12.8, < 12.8.3 | 12.8.3 | NVD |
| 12.7 | ≥ 12.7, < 12.7.2 | 12.7.2 | NVD |
| 12.6 | ≥ 12.6, < 12.6.3 | 12.6.3 | NVD |
| 12.5 | ≥ 12.5, < 12.5.2 | 12.5.2 | NVD |
| 12.1 | ≥ 12.1, < 12.1.3 | 12.1.3 | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
- Update Cisco jabber to 12.9.1 · 12.8.3 · 12.7.2 · 12.6.3 · 12.5.2 · 12.1.3
Advisories and patches
- tools.cisco.comVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Published
- 2020-09-04
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2020-3495?
Is CVE-2020-3495 actively exploited?
What is the CVSS score for CVE-2020-3495?
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Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.