CVE-2020-12474: Telegram Desktop through 2.0.1, Telegram through 6.0.1 for Android, and Telegram through 6.0.1 for iOS allow a

Q: How do I fix CVE-2020-12474?

telegram: upgrade to newer than 6.0.1; telegram: upgrade to newer than 6.0.1; telegram desktop: upgrade to newer than 2.0.1. Exact commands for each OS are on this page.

Q: Is CVE-2020-12474 being exploited?

CVE-2020-12474 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-12474 affect?

CVE-2020-12474 affects telegram, telegram, telegram desktop. Severity is 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 Homograph attack via Punycode in a public URL or a group chat invitation URL.

Q: How urgent is CVE-2020-12474?

Priority 44/100. No elevated risk signals yet.

This month

MEDIUM 6.5UPGRADEUPGRADEUPGRADE

CVE-2020-12474 is a medium-severity flaw (CVSS 6.5) affecting telegram, telegram, telegram desktop. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Telegram Desktop through 2.0.1, Telegram through 6.0.1 for Android, and Telegram through 6.0.1 for iOS allow an IDN Homograph attack via Punycode in a public URL or a group chat invitation URL.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	2.6% (top 15%)
CISA exploited list	No
Published	2020-05-01
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: telegram

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-05-01 14:15 UTCPublished CVE record published
2026-06-17 02:51 UTCUpdated Record last modified

telegram telegram UPGRADE

Affected: <= 6.0.1

Fixed in: newer than 6.0.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy telegram || rpm -q telegram || telegram --version

2. UPGRADE to newer than 6.0.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade telegram

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade telegram

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

telegram telegram UPGRADE

Affected: <= 6.0.1

Fixed in: newer than 6.0.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy telegram || rpm -q telegram || telegram --version

2. UPGRADE to newer than 6.0.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade telegram

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade telegram

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

telegram telegram desktop UPGRADE

Affected: <= 2.0.1

Fixed in: newer than 2.0.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy telegram-desktop || rpm -q telegram-desktop || telegram-desktop --version

2. UPGRADE to newer than 2.0.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade telegram-desktop

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade telegram-desktop

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-12474?

telegram: upgrade to newer than 6.0.1; telegram: upgrade to newer than 6.0.1; telegram desktop: upgrade to newer than 2.0.1. Exact commands for each OS are on this page.

Is CVE-2020-12474 being exploited?

CVE-2020-12474 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-12474 affect?

CVE-2020-12474 affects telegram, telegram, telegram desktop. Severity is 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 Homograph attack via Punycode in a public URL or a group chat invitation URL.

How urgent is CVE-2020-12474?

Priority 44/100. No elevated risk signals yet.

Software pages

Android vulnerabilities · iOS vulnerabilities · Telegram vulnerabilities

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References

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