How severe is CVE-2020-17448?

CVE-2020-17448 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-17448 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-17448?

CVE-2020-17448 affects Telegram Telegram Desktop. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-17448?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-17448 published?

CVE-2020-17448 was published on 2020-08-11 and last updated on 2026-06-17.

CVE-2020-17448

CVE-2020-17448 is a high-severity vulnerability in Telegram Telegram Desktop with a CVSS 3.x base score of 7.8. 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-863.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 6.8
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Telegram Telegram Desktop
Published: 2020-08-11
Last modified: 2026-06-17

Description

Telegram Desktop through 2.1.13 allows a spoofed file type to bypass the Dangerous File Type Execution protection mechanism, as demonstrated by use of the chat window with a filename that lacks an extension.

Frequently asked questions

What is CVE-2020-17448?: Telegram Desktop through 2.1.13 allows a spoofed file type to bypass the Dangerous File Type Execution protection mechanism, as demonstrated by use of the chat window with a filename that lacks an extension.
How severe is CVE-2020-17448?: CVE-2020-17448 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-17448 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-17448?: CVE-2020-17448 affects Telegram Telegram Desktop. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-17448?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-17448 published?: CVE-2020-17448 was published on 2020-08-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:telegram:telegram_desktop:*:*:*:*:*:*:*:*

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