What’s Vulnerable › Vulnerabilities

CVE-2021-40532

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-09-06 · updated 2026-06-17

Description

Telegram Web K Alpha before 0.7.2 mishandles the characters in a document extension.

Affected products

• Telegram Web K Alpha: before 0.7.2 — fixed in 0.7.2

How to fix

Upgrade to a fixed version: Telegram Web K Alpha 0.7.2. Check the vendor advisory for mitigations.

References

• https://github.com/morethanwords/tweb/commit/f224e459c36eb96b2cf9dba559a48b1f08d23330
• https://github.com/morethanwords/tweb/commit/f224e459c36eb96b2cf9dba559a48b1f08d23330

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