Company Details
protonprivacy
798
128,128
513
proton.me
319
PRO_2905041
Completed

Proton Company CyberSecurity Posture
proton.meA better internet starts with privacy. At Proton, we believe that privacy is a human right, the foundation of a free and open society. That’s why we’re building an ecosystem of privacy-first, open-source tools that put people (not profits) first. Created by scientists from CERN and MIT, governed by the Proton Foundation (a Swiss non-profit organization) and powered by a global community of supporters, Proton is independent, community-funded, and 100% subscription-based, not driven by ads or data mining. Our privacy-by-design ecosystem includes: ✉️ Proton Mail: the world’s most private email service, free of ads and trackers 🌐 Proton VPN: a fast, secure VPN to browse freely and protect your identity online 🗓️ Proton Calendar: an encrypted calendar that keeps your schedule private 🗂️ Proton Drive: encrypted cloud storage with secure file sharing and Proton Docs for private document editing 🔑 Proton Pass: a secure password manager with a built in 2FA authenticator for logins, hide-my-email aliases, credit cards, notes, and encrypted files. 🔒 Proton Authenticator: a free, open-source 2FA app that keeps your accounts safe 🤖 Lumo: your privacy-respecting AI assistant, powered by Proton’s secure ecosystem Trusted by over 100 million people worldwide, from journalists and activists to global NGOs, academics, and creatives, Proton is the trusted alternative to Big Tech. Headquartered in Switzerland, with offices in Geneva, Zurich, Skopje, Taipei, Vilnius, Barcelona, Paris, and Prague, Proton is home to a growing team of 600+ people across 20+ countries, united by a single mission: To make privacy the default for everyone. 🔐
Company Details
protonprivacy
798
128,128
513
proton.me
319
PRO_2905041
Completed
Between 700 and 749

Proton Global Score (TPRM)XXXX

Description: Proton is enhancing user privacy by launching an encrypted document creation and collaboration feature within its file storage system. This initiative counteracts the non-encrypted, data-intensive models of cloud services provided by companies like Google and Microsoft. Proton's encryption ensures that only document creators and permitted collaborators have access to file contents, barring even the company itself from viewing these private documents. The update positions Proton among the few businesses offering online encrypted document editing and reaffirms its commitment to user privacy and secure online experiences. The implementation mimics the user-friendliness of Google Docs, aiming to draw users who prioritize privacy without compromising on convenience.
Description: Proton, known for its privacy-centric services, has introduced a feature for creating, editing, and collaborating on end-to-end encrypted documents within its storage systems, challenging the practices of tech giants like Google and Microsoft. This innovation safeguards user data from third parties, including Proton, which cannot access the content of the files. The initiative enhances user privacy, directly confronting the data collection methodologies prevalent among leading cloud service providers. As a result, there have been no reported data leaks or negative consequences following the implementation of the encrypted document feature provided by Proton.
Description: ProtonVPN were exposed to vulnerabilities that could have allowed hackers to execute arbitrary code with administrator privileges on computers running Windows. The bugs, CVE-2018-395 were discovered by Cisco Talos security researchers which is similar to another security flaw discovered in March by security consulting firm VerSprite. ProtonVPN had released patches to fix the original vulnerability. It was still possible to execute code as an administrator albeit through a exploit. The initial vulnerability was due to OpenVPN being able to select a malicious file when choosing a VPN configuration. This could have given access to private information and hacking through arbitrary commands. They use OpenVPN's open-source software to set up secure connections from one point to another. Later versions of ProtonVPN have resolved this issue and users have been automatically prompted to update. They have not seen any evidence of this being exploited in the wild, as a user's computer needs to first be compromised by a hacker before this bug can be exploited


No incidents recorded for Proton in 2025.
No incidents recorded for Proton in 2025.
No incidents recorded for Proton in 2025.
Proton cyber incidents detection timeline including parent company and subsidiaries

A better internet starts with privacy. At Proton, we believe that privacy is a human right, the foundation of a free and open society. That’s why we’re building an ecosystem of privacy-first, open-source tools that put people (not profits) first. Created by scientists from CERN and MIT, governed by the Proton Foundation (a Swiss non-profit organization) and powered by a global community of supporters, Proton is independent, community-funded, and 100% subscription-based, not driven by ads or data mining. Our privacy-by-design ecosystem includes: ✉️ Proton Mail: the world’s most private email service, free of ads and trackers 🌐 Proton VPN: a fast, secure VPN to browse freely and protect your identity online 🗓️ Proton Calendar: an encrypted calendar that keeps your schedule private 🗂️ Proton Drive: encrypted cloud storage with secure file sharing and Proton Docs for private document editing 🔑 Proton Pass: a secure password manager with a built in 2FA authenticator for logins, hide-my-email aliases, credit cards, notes, and encrypted files. 🔒 Proton Authenticator: a free, open-source 2FA app that keeps your accounts safe 🤖 Lumo: your privacy-respecting AI assistant, powered by Proton’s secure ecosystem Trusted by over 100 million people worldwide, from journalists and activists to global NGOs, academics, and creatives, Proton is the trusted alternative to Big Tech. Headquartered in Switzerland, with offices in Geneva, Zurich, Skopje, Taipei, Vilnius, Barcelona, Paris, and Prague, Proton is home to a growing team of 600+ people across 20+ countries, united by a single mission: To make privacy the default for everyone. 🔐


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Cultural institutions can get two years of Proton's premium password manager for free.
Proton VPN reveals that early Black Friday sales funded the addition of 800 exit nodes, reinforcing its privacy-driven infrastructure model.
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Explore insights on cybersecurity incidents, risk posture, and Rankiteo's assessments.
The official website of Proton is https://proton.me/.
According to Rankiteo, Proton’s AI-generated cybersecurity score is 719, reflecting their Moderate security posture.
According to Rankiteo, Proton currently holds 0 security badges, indicating that no recognized compliance certifications are currently verified for the organization.
According to Rankiteo, Proton is not certified under SOC 2 Type 1.
According to Rankiteo, Proton does not hold a SOC 2 Type 2 certification.
According to Rankiteo, Proton is not listed as GDPR compliant.
According to Rankiteo, Proton does not currently maintain PCI DSS compliance.
According to Rankiteo, Proton is not compliant with HIPAA regulations.
According to Rankiteo,Proton is not certified under ISO 27001, indicating the absence of a formally recognized information security management framework.
Proton operates primarily in the Technology, Information and Internet industry.
Proton employs approximately 798 people worldwide.
Proton presently has no subsidiaries across any sectors.
Proton’s official LinkedIn profile has approximately 128,128 followers.
Proton is classified under the NAICS code 513, which corresponds to Others.
No, Proton does not have a profile on Crunchbase.
Yes, Proton maintains an official LinkedIn profile, which is actively utilized for branding and talent engagement, which can be accessed here: https://www.linkedin.com/company/protonprivacy.
As of November 28, 2025, Rankiteo reports that Proton has experienced 3 cybersecurity incidents.
Proton has an estimated 12,525 peer or competitor companies worldwide.
Incident Types: The types of cybersecurity incidents that have occurred include Breach and Vulnerability.
Detection and Response: The company detects and responds to cybersecurity incidents through an third party assistance with cisco talos, third party assistance with versprite, and remediation measures with released patches to fix the vulnerability, remediation measures with automatically prompted users to update..
Title: ProtonVPN Vulnerability Exposure
Description: ProtonVPN was exposed to vulnerabilities that could have allowed hackers to execute arbitrary code with administrator privileges on computers running Windows.
Type: Vulnerability Exploitation
Attack Vector: Selecting a malicious file when choosing a VPN configuration
Vulnerability Exploited: CVE-2018-3952
Motivation: Unauthorized access to private information and arbitrary command execution
Title: Proton Enhances User Privacy with Encrypted Document Feature
Description: Proton is launching an encrypted document creation and collaboration feature within its file storage system to enhance user privacy and security.
Type: Feature Enhancement
Motivation: Enhance user privacy and security
Title: Proton Introduces End-to-End Encrypted Documents
Description: Proton has introduced a feature for creating, editing, and collaborating on end-to-end encrypted documents within its storage systems, challenging the practices of tech giants like Google and Microsoft. This innovation safeguards user data from third parties, including Proton, which cannot access the content of the files. The initiative enhances user privacy, directly confronting the data collection methodologies prevalent among leading cloud service providers. As a result, there have been no reported data leaks or negative consequences following the implementation of the encrypted document feature provided by Proton.
Type: Feature Implementation
Motivation: Enhance user privacy
Common Attack Types: The most common types of attacks the company has faced is Vulnerability.

Systems Affected: Windows computers running ProtonVPN

Brand Reputation Impact: Positive

Entity Name: ProtonVPN
Entity Type: Company
Industry: Cybersecurity

Entity Name: Proton
Entity Type: Company
Industry: Technology

Entity Name: Proton
Entity Type: Company
Industry: Technology

Third Party Assistance: Cisco Talos, Versprite.
Remediation Measures: Released patches to fix the vulnerabilityAutomatically prompted users to update
Third-Party Assistance: The company involves third-party assistance in incident response through Cisco Talos, VerSprite, .

Data Encryption: Yes

Data Encryption: End-to-end encryption
Prevention of Data Exfiltration: The company takes the following measures to prevent data exfiltration: Released patches to fix the vulnerability, Automatically prompted users to update, .

Lessons Learned: Implementing end-to-end encryption for documents enhances user privacy and safeguards data from third parties.

Recommendations: Consider adopting similar end-to-end encryption measures for data protection.
Key Lessons Learned: The key lessons learned from past incidents are Implementing end-to-end encryption for documents enhances user privacy and safeguards data from third parties.

Source: Cisco Talos

Source: VerSprite
Additional Resources: Stakeholders can find additional resources on cybersecurity best practices at and Source: Cisco Talos, and Source: VerSprite.

Root Causes: Openvpn Being Able To Select A Malicious File When Choosing A Vpn Configuration,
Corrective Actions: Released Patches To Fix The Vulnerability, Automatically Prompted Users To Update,
Post-Incident Analysis Process: The company's process for conducting post-incident analysis is described as Cisco Talos, Versprite, .
Corrective Actions Taken: The company has taken the following corrective actions based on post-incident analysis: Released Patches To Fix The Vulnerability, Automatically Prompted Users To Update, .
Most Significant System Affected: The most significant system affected in an incident was Windows computers running ProtonVPN.
Third-Party Assistance in Most Recent Incident: The third-party assistance involved in the most recent incident was cisco talos, versprite, .
Most Significant Lesson Learned: The most significant lesson learned from past incidents was Implementing end-to-end encryption for documents enhances user privacy and safeguards data from third parties.
Most Significant Recommendation Implemented: The most significant recommendation implemented to improve cybersecurity was Consider adopting similar end-to-end encryption measures for data protection..
Most Recent Source: The most recent source of information about an incident are Cisco Talos and VerSprite.
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Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to versions 19.2.16, 20.3.14, and 21.0.1, there is a XSRF token leakage via protocol-relative URLs in angular HTTP clients. The vulnerability is a Credential Leak by App Logic that leads to the unauthorized disclosure of the Cross-Site Request Forgery (XSRF) token to an attacker-controlled domain. Angular's HttpClient has a built-in XSRF protection mechanism that works by checking if a request URL starts with a protocol (http:// or https://) to determine if it is cross-origin. If the URL starts with protocol-relative URL (//), it is incorrectly treated as a same-origin request, and the XSRF token is automatically added to the X-XSRF-TOKEN header. This issue has been patched in versions 19.2.16, 20.3.14, and 21.0.1. A workaround for this issue involves avoiding using protocol-relative URLs (URLs starting with //) in HttpClient requests. All backend communication URLs should be hardcoded as relative paths (starting with a single /) or fully qualified, trusted absolute URLs.
Forge (also called `node-forge`) is a native implementation of Transport Layer Security in JavaScript. An Uncontrolled Recursion vulnerability in node-forge versions 1.3.1 and below enables remote, unauthenticated attackers to craft deep ASN.1 structures that trigger unbounded recursive parsing. This leads to a Denial-of-Service (DoS) via stack exhaustion when parsing untrusted DER inputs. This issue has been patched in version 1.3.2.
Forge (also called `node-forge`) is a native implementation of Transport Layer Security in JavaScript. An Integer Overflow vulnerability in node-forge versions 1.3.1 and below enables remote, unauthenticated attackers to craft ASN.1 structures containing OIDs with oversized arcs. These arcs may be decoded as smaller, trusted OIDs due to 32-bit bitwise truncation, enabling the bypass of downstream OID-based security decisions. This issue has been patched in version 1.3.2.
Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. Prior to versions 7.0.13 and 8.0.2, working with large buffers in Lua scripts can lead to a stack overflow. Users of Lua rules and output scripts may be affected when working with large buffers. This includes a rule passing a large buffer to a Lua script. This issue has been patched in versions 7.0.13 and 8.0.2. A workaround for this issue involves disabling Lua rules and output scripts, or making sure limits, such as stream.depth.reassembly and HTTP response body limits (response-body-limit), are set to less than half the stack size.
Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. In versions from 8.0.0 to before 8.0.2, a NULL dereference can occur when the entropy keyword is used in conjunction with base64_data. This issue has been patched in version 8.0.2. A workaround involves disabling rules that use entropy in conjunction with base64_data.

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