CVE-2021-1242
CVE-2021-1242 is a medium-severity vulnerability in Cisco Webex Teams with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-450.
Key facts
- Severity: Medium (CVSS 3.x base score 4.3)
- CVSS v2: 4.3
- EPSS exploit prediction: 1% (68th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-450
- Affected product: Cisco Webex Teams
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2021-1242?
- 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.
- How severe is CVE-2021-1242?
- CVE-2021-1242 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
- Is CVE-2021-1242 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-1242?
- CVE-2021-1242 affects Cisco Webex Teams. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-1242?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-1242 published?
- CVE-2021-1242 was published on 2021-01-13 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:cisco:webex_teams:*:*:*:*:*:*:*:*
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