CVE-2021-1469Network attack vector

Authenticated remote code execution via XMPP message validation

Published Mar 24, 2021 · Updated Nov 8, 2024

Arbitrary program execution in Cisco Jabber for Windows allows remote authenticated users to execute programs via crafted XMPP messages. The client improperly validates message content from a specially provisioned XMPP account, allowing crafted messages to trigger execution with the logged-in user's privileges. Exploitation requires XMPP server authentication and message delivery to a targeted client, with consequences bounded by that user's operating-system privileges.

CVSS severity7.2
High
EPSS probability1.03%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Arbitrary program execution in Cisco Jabber for Windows allows remote authenticated users to execute programs via crafted XMPP messages. The client improperly validates message content from a specially provisioned XMPP account, allowing crafted messages to trigger execution with the logged-in user's privileges. Exploitation requires XMPP server authentication and message delivery to a targeted client, with consequences bounded by that user's operating-system privileges.

The record

CVE
CVE-2021-1469
Published
Mar 24, 2021
Updated
Nov 8, 2024
Vendor
ClamAV
Product
Cisco Jabber
Classifications
CWE-20, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 24, 2021CVE publishedPublication date reported by the CVE source.
  2. Nov 8, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ClamAV · Cisco Jabberversion=n/a

Published CVSS scores

7.2Cisco SystemsCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo