How severe is CVE-2021-37596?

CVE-2021-37596 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-37596 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-37596?

CVE-2021-37596 affects Telegram Web K Alpha. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-37596?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-37596 published?

CVE-2021-37596 was published on 2021-07-30 and last updated on 2026-06-17.

CVE-2021-37596

CVE-2021-37596 is a medium-severity vulnerability in Telegram Web K Alpha with a CVSS 3.x base score of 6.1. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Telegram Web K Alpha
Published: 2021-07-30
Last modified: 2026-06-17

Description

Telegram Web K Alpha 0.6.1 allows XSS via a document name.

Frequently asked questions

What is CVE-2021-37596?: Telegram Web K Alpha 0.6.1 allows XSS via a document name.
How severe is CVE-2021-37596?: CVE-2021-37596 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-37596 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-37596?: CVE-2021-37596 affects Telegram Web K Alpha. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-37596?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-37596 published?: CVE-2021-37596 was published on 2021-07-30 and last updated on 2026-06-17.

References

https://github.com/morethanwords/tweb/commit/11d2fe01363889f20c8baa2217ed4aad445c5551

Affected products (1)

cpe:2.3:a:telegram:web_k_alpha:0.6.1:*:*:*:*:*:*:*

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