How severe is CVE-2019-10044?

CVE-2019-10044 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-10044 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-10044?

CVE-2019-10044 primarily affects Telegram. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-10044?

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-2019-10044 published?

CVE-2019-10044 was published on 2019-03-25 and last updated on 2026-06-17.

CVE-2019-10044

CVE-2019-10044 is a high-severity vulnerability in Telegram with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Telegram
Published: 2019-03-25
Last modified: 2026-06-17

Description

Telegram Desktop before 1.5.12 on Windows, and the Telegram applications for Android, iOS, and Linux, is vulnerable to an IDN homograph attack when displaying messages containing URLs. This occurs because the application produces a clickable link even if (for example) Latin and Cyrillic characters exist in the same domain name, and the available font has an identical representation of characters from different alphabets.

Frequently asked questions

What is CVE-2019-10044?: Telegram Desktop before 1.5.12 on Windows, and the Telegram applications for Android, iOS, and Linux, is vulnerable to an IDN homograph attack when displaying messages containing URLs. This occurs because the application produces a clickable link even if (for example) Latin and Cyrillic characters exist in the same domain name, and the available font has an identical representation of characters from different alphabets.
How severe is CVE-2019-10044?: CVE-2019-10044 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-10044 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-10044?: CVE-2019-10044 primarily affects Telegram. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-10044?: 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-2019-10044 published?: CVE-2019-10044 was published on 2019-03-25 and last updated on 2026-06-17.

References

Affected products (2)

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

More vulnerabilities in Telegram

CVE-2024-7014 — High (CVSS 8.1): EvilVideo vulnerability allows sending malicious apps disguised as videos in Telegram for Android application affecting…
CVE-2018-20436 — High (CVSS 8.1): The "secret chat" feature in Telegram 4.9.1 for Android has a "side channel" in which Telegram servers send GET…
CVE-2021-31321 — High (CVSS 7.1): Telegram Android <7.1.0 (2090), Telegram iOS <7.1, and Telegram macOS <7.1 are affected by a Stack Based Overflow in…
CVE-2021-31320 — High (CVSS 7.1): Telegram Android <7.1.0 (2090), Telegram iOS <7.1, and Telegram macOS <7.1 are affected by a Heap Buffer Overflow in…
CVE-2018-15543 — Medium (CVSS 6.8): An issue was discovered in the org.telegram.messenger application 4.8.11 for Android. The FingerprintManager class for…
CVE-2020-12474 — Medium (CVSS 6.5): Telegram Desktop through 2.0.1, Telegram through 6.0.1 for Android, and Telegram through 6.0.1 for iOS allow an IDN…

All CVEs affecting Telegram →