CVE-2021-40532
CVE-2021-40532 is a critical-severity vulnerability in Telegram Web K Alpha with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 1% (62nd percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Telegram Web K Alpha
- Published:
- Last modified:
Description
Telegram Web K Alpha before 0.7.2 mishandles the characters in a document extension.
Frequently asked questions
- What is CVE-2021-40532?
- Telegram Web K Alpha before 0.7.2 mishandles the characters in a document extension.
- How severe is CVE-2021-40532?
- CVE-2021-40532 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-40532 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-40532?
- CVE-2021-40532 affects Telegram Web K Alpha. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-40532?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2021-40532 published?
- CVE-2021-40532 was published on 2021-09-06 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:telegram:web_k_alpha:*:*:*:*:*:*:*:*
More vulnerabilities in Telegram Web K Alpha
- CVE-2021-37596 — Medium (CVSS 6.1): Telegram Web K Alpha 0.6.1 allows XSS via a document name.