CVE-2021-1242 Cisco Webex Teams Shared File Manipulation Vulnerability
An unauthenticated attacker can manipulate shared file names in Cisco Webex Teams to facilitate phishing or spoofing attacks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-1242?
CVE-2021-1242 is a medium-severity vulnerability in Cisco Webex Teams, published on 13 Jan 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-450
Which versions are affected by CVE-2021-1242?
It affects 1 product.
Products include Cisco Webex Teams.
How do I fix CVE-2021-1242?
No fix has been published for CVE-2021-1242 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-1242 being exploited?
There is no known exploitation of CVE-2021-1242 in the wild and no public exploit code.
Other vulnerabilities in Cisco Webex Teams
- CVE-2025-20236 Cisco Webex App Client-Side Remote Code Execution Vulnerability
- CVE-2018-0387 Code injection in Cisco Webex Teams unknown
- CVE-2018-0436 Cisco Webex Teams Information Disclosure and Modification Vulnerability
- CVE-2020-3535 Cisco Webex Teams Client for Windows DLL Hijacking Vulnerability
- CVE-2019-1636 Cisco Webex Teams URI Handler Insecure Library Loading Vulnerability
Sources
Also known as GHSA-w44v-8fr4-v7gw.