CVE-2021-1242

Cisco Webex Teams Shared File Manipulation Vulnerability

MEDIUM
4.3
CVSS Score
Published: January 13, 2021 at 09:17 PM UTC
Updated: June 17, 2026 at 03:31 AM UTC
1 product affected across 1 vendorWebex Teams

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Severity
MEDIUM4.3
Exploit prediction
EPSS 1%
SSVC
No known exploit

Description

A vulnerability in Cisco Webex Teams could allow an unauthenticated, remote attacker to manipulate file names within the messaging interface. The vulnerability exists because the affected software mishandles character rendering. An attacker could exploit this vulnerability by sharing a file within the application interface. A successful exploit could allow the attacker to modify how the shared file name displays within the interface, which could allow the attacker to conduct phishing or spoofing attacks.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 40.12.0.17293
Affected range stops below 40.12.0.17293, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.3MEDIUMcisco
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-450NVD-CWE-noinfo

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