What is the official website of Substack ?

The official website of Substack is http://substack.com.

What is Substack's cybersecurity risk score?

Substack has an AI-generated cybersecurity risk score of 522 out of 1000, indicating a Critical security posture according to Rankiteo's assessment.

How many security incidents has Substack experienced?

According to Rankiteo, Substack currently holds 0 security badges, indicating that no recognized compliance certifications are currently verified for the organization.

Has Substack been affected by any supply chain cyber incidents ?

According to Rankiteo, Substack has been affected by a supply chain cyber incident involving Ivanti, with the incident ID SUB1770295740.

Does Substack have SOC 2 Type 1 certification ?

According to Rankiteo, Substack is not certified under SOC 2 Type 1.

Does Substack have SOC 2 Type 2 certification ?

According to Rankiteo, Substack does not hold a SOC 2 Type 2 certification.

Does Substack comply with GDPR ?

According to Rankiteo, Substack is not listed as GDPR compliant.

Does Substack have PCI DSS certification ?

According to Rankiteo, Substack does not currently maintain PCI DSS compliance.

Does Substack comply with HIPAA ?

According to Rankiteo, Substack is not compliant with HIPAA regulations.

Does Substack have ISO 27001 certification ?

According to Rankiteo,Substack is not certified under ISO 27001, indicating the absence of a formally recognized information security management framework.

Which industry does Substack operate in ?

Substack operates primarily in the Online Audio and Video Media industry.

How many employees does Substack have ?

Substack employs approximately 2,843 people worldwide.

Does Substack own any subsidiaries ?

Substack presently has no subsidiaries across any sectors.

How many LinkedIn followers does Substack have ?

Substack's official LinkedIn profile has approximately 72,365 followers.

What is the NAICS classification code for Substack ?

Substack is classified under the NAICS code 519131, which corresponds to Others.

Does Substack have a Crunchbase profile ?

No, Substack does not have a profile on Crunchbase.

Does Substack have a LinkedIn profile ?

Yes, Substack maintains an official LinkedIn profile, which is actively utilized for branding and talent engagement, which can be accessed here: https://www.linkedin.com/company/substack.

How many cybersecurity incidents has Substack experienced ?

As of August 28, 2026, Rankiteo reports that Substack has experienced 3 cybersecurity incidents.

How many peer or competitor companies does Substack have ?

Substack has an estimated 1,952 peer or competitor companies worldwide.

What types of cybersecurity incidents has Substack faced ?

Incident Types: The types of cybersecurity incidents that have occurred include Breach.

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Substack

Boost Score +25 with badge (5 left)

522

/1000

Critical

547

/1000

Critical

Substack Vendor Cyber Rating & Cyber Score

substack.com

Add Your Compliance Badge

Substack is a new media app that connects you with the creators, ideas, and communities you care about most. Founded in 2017, Substack is building a new economic engine for culture by putting publishers in charge and enabling subscribers to support the work they deeply value. There are more than 5 million paid subscriptions to writers and creators across the Substack network.

Substack A.I CyberSecurity Scoring

Scoring History

Substack

Substack CyberSecurity News & History

Past Incidents

Attack Types

Entity

Type

Severity

Impact

Seen

Blog Details

Supply Chain Source

Incident Details

View

Substack

Breach

3/2026

MCGSUBAMTADTHAL...

Substack

Breach

2/2026

Ivanti

SUB1770295740

Substack

Breach

10/2025

SUB1771967867

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A.I.

Substack Company Scoring based on AI Models

Cyber Incidents Likelihood 3 - 6 - 9 months

Actual

Prediction

Incident Predictions locked

Access Monitoring Plan

A.I Risk Score Likelihood 3 - 6 - 9 months

Actual

Prediction A

Prediction B

Prediction C

Prediction D

A.I. Risk Score Predictions locked

Access Monitoring Plan

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Underwriter Stats for Substack

Incidents vs Online Audio and Video Media Industry Avg (This Year)

Substack has 21.26% fewer incidents than the average of same-industry companies with at least one recorded incident.

Incidents vs All-Companies Average (This Year)

Substack has 94.17% more incidents than the average of all companies with at least one recorded incident.

Incident Types Substack vs Online Audio and Video Media Industry Avg (This Year)

Substack reported 2 incidents this year: 0 cyber attacks, 0 ransomware, 0 vulnerabilities, 2 data breaches, compared to industry peers with at least 1 incident.

Incident History - Substack (X = Date, Y = Severity)

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SUBSIDIARY

Substack Subsidiaries

Parent Company

Substack

Online Audio and Video Media

Website: http://substack.com

Company Size: 51-200 employees

No subsidiary data available for this company.

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Substack Similar Companies

Vox Media

voxmedia.com

Vox Media, the leader in modern media, is home to a portfolio of top talent and engaging editorial brands that ignite conversations and set trends, including Eater, Vox, The Verge, SB Nation, The Dodo, New York Magazine, The Cut, and Vulture. The company’s podcast network is one of the largest in the U.S., publishing premium shows that inform, entertain, and delight, including Pivot, Criminal, Today Explained, Where Should We Begin?, Stay Tuned with Preet, The Vergecast, Waveform, and A Touch More. Across platforms, Vox Media defines culture through stories that shape all aspects of our audience’s lives.

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NEWS

Substack CyberSecurity News

Global CVEs (Not Company-Specific)

CVE-2026-81934

SUMMARY

Redis contains a use-after-free vulnerability in the 'tlsProcessPendingData()' function, which handles the TLS pending-data list if Redis is configured with TLS support. A remote, unauthenticated attacker may be able to execute arbitrary commands with the privileges of the Redis server. Fixed in Redis 8.2.9, 8.4.6, 8.6.6, 8.8.2, and 8.10.1.

Published

Date2026-08-27

Updated

Date2026-08-27

RISK INFORMATION (Score: 9.8)

cvss3

Base Score: 9.8

Complexity: LOW

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

cvss4

Base Score: 9.2

Complexity: LOW

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Impact Score

5.9

Exploitability

3.9

REFERENCES

CVE-2026-81931

SUMMARY

Unrestricted Upload of File with Dangerous Type in the product photo upload in Roskus Prospero Flow CRM before 5.16.0 allows an authenticated user holding the create product permission (routine Seller role) to execute arbitrary JavaScript in the application origin. The photo validation rule classifies the file only by its content (magic bytes) and rejects only a fixed list of PHP extensions, while ProductSaveController::save() names the stored file using the client-supplied extension and copies it into the public web root. A file that begins with an image header and carries an HTML extension passes validation, is stored under public/asset/upload/product/, and is served with a text/html content type, turning the upload into first-party stored script execution.

Published

Date2026-08-27

Updated

Date2026-08-27

RISK INFORMATION (Score: )

cvss4

Base Score: 4.8

Complexity: LOW

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Impact Score

Exploitability

REFERENCES

CVE-2026-81893

SUMMARY

A flaw was found in gdk-pixbuf. When loading a specially crafted JPEG image containing chunked ICC profile markers, an error during ICC profile parsing can leave stale size metadata after the profile buffer is freed. A subsequent allocation in the same decode can cause an out-of-bounds write, potentially crashing the application. To exploit this flaw, an application using gdk-pixbuf must process the malicious JPEG image. Affected version >= 2.26.4

Published

Date2026-08-27

Updated

Date2026-08-27

RISK INFORMATION (Score: 4.7)

cvss3

Base Score: 4.7

Complexity: HIGH

CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H

Impact Score

3.6

Exploitability

REFERENCES

CVE-2026-81838

SUMMARY

A relative path traversal issue in the zip extraction functionality in AWS diagram-as-code (awsdac) in versions 0.10 through 0.23 can allow a third party to write arbitrary files to the local filesystem via crafted zip entry names containing path traversal sequences. This could allow the third party to perform inappropriate actions in the diagram bundle. To remediate this issue, users should upgrade to the version 0.24 or later.

Published

Date2026-08-27

Updated

Date2026-08-27

RISK INFORMATION (Score: 7.1)

cvss3

Base Score: 7.1

Complexity: LOW

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

cvss4

Base Score: 6.8

Complexity: LOW

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Impact Score

5.2

Exploitability

1.8

REFERENCES

CVE-2026-81834

SUMMARY

A weakness has been identified in RooCodeInc Roo-Code up to 3.51.1. Affected by this issue is the function ExecaTerminalProcess of the component README File Handler. Executing a manipulation can lead to code injection. The attack can be executed remotely. The exploit has been made available to the public and could be used for attacks. Multiple isses were reported to the vendor beforehand. They explain, that "they all apply to Roo Code, a project we no longer support - the repository was archived a while ago, and we don't encourage anyone to use it." This vulnerability only affects products that are no longer supported by the maintainer.

Published

Date2026-08-27

Updated

Date2026-08-27

RISK INFORMATION (Score: 6.3)

cvss2

Base Score: 7.5

Complexity: LOW

AV:N/AC:L/Au:N/C:P/I:P/A:P

cvss3

Base Score: 6.3

Complexity: LOW

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

cvss4

Base Score: 2.1

Complexity: LOW

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Impact Score

3.4

Exploitability

2.8

REFERENCES

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