CVE-2020-1901
CVE-2020-1901 is a medium-severity vulnerability in Whatsapp with a CVSS 3.x base score of 5.3. 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-400.
Key facts
- Severity: Medium (CVSS 3.x base score 5.3)
- CVSS v2: 5.0
- EPSS exploit prediction: 1% (59th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-400
- Affected product: Whatsapp
- Published:
- Last modified:
Description
Receiving a large text message containing URLs in WhatsApp for iOS prior to v2.20.91.4 could have caused the application to freeze while processing the message.
Frequently asked questions
- What is CVE-2020-1901?
- Receiving a large text message containing URLs in WhatsApp for iOS prior to v2.20.91.4 could have caused the application to freeze while processing the message.
- How severe is CVE-2020-1901?
- CVE-2020-1901 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
- Is CVE-2020-1901 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-1901?
- CVE-2020-1901 affects Whatsapp. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-1901?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2020-1901 published?
- CVE-2020-1901 was published on 2020-10-06 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:iphone_os:*:*
More vulnerabilities in Whatsapp
- CVE-2022-36934 — Critical (CVSS 9.8): An integer overflow in WhatsApp could result in remote code execution in an established video call.
- CVE-2021-24042 — Critical (CVSS 9.8): The calling logic for WhatsApp for Android prior to v2.21.23, WhatsApp Business for Android prior to v2.21.23, WhatsApp…
- CVE-2021-24041 — Critical (CVSS 9.8): A missing bounds check in image blurring code prior to WhatsApp for Android v2.21.22.7 and WhatsApp Business for…
- CVE-2021-24026 — Critical (CVSS 9.8): A missing bounds check within the audio decoding pipeline for WhatsApp calls in WhatsApp for Android prior to v2.21.3,…
- CVE-2020-1909 — Critical (CVSS 9.8): A use-after-free in a logging library in WhatsApp for iOS prior to v2.20.111 and WhatsApp Business for iOS prior to…
- CVE-2020-1907 — Critical (CVSS 9.8): A stack overflow in WhatsApp for Android prior to v2.20.196.16, WhatsApp Business for Android prior to v2.20.196.12,…
Other CWE-400 (Uncontrolled Resource Consumption) vulnerabilities
- CVE-2026-46775 — Critical (CVSS 9.9): Vulnerability in Oracle REST Data Services (component: Core). Supported versions that are affected are 24.2.0-26.1.0.…
- CVE-2025-61303 — Critical (CVSS 9.8): Hatching Triage Sandbox Windows 10 build 2004 (2025-08-14) and Windows 10 LTSC 2021(2025-08-14) contains a…
- CVE-2025-43193 — Critical (CVSS 9.8): The issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.6, macOS Sonoma 14.7.7,…
- CVE-2025-24269 — Critical (CVSS 9.8): The issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.4. An app may be able to…
- CVE-2025-24264 — Critical (CVSS 9.8): The issue was addressed with improved memory handling. This issue is fixed in Safari 18.4, iOS 18.4 and iPadOS 18.4,…
- CVE-2025-24260 — Critical (CVSS 9.8): The issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.4, macOS Sonoma 14.7.5,…
Browse all CWE-400 (Uncontrolled Resource Consumption) vulnerabilities →