7.5

CVE-2021-47793: telegram telegram_desktop

CVSS: 7.5v3.1HighAnalyzed
AliasesDEBIAN-CVE-2021-47793
Published 15-01-2026Last modified 05-03-2026
Open JSON

Vulnerability summary

CVE-2021-47793 is a high (CVSS 7.5) vulnerability in telegram telegram_desktop. EPSS estimates a 0.50% chance of exploitation in the next 30 days, higher than 41.6% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
40/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.50%
0%100%
Low · -0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1exploit-database

Timeline

  1. 15-01-2026
    PublishedVulnerability first disclosed.
  2. 05-03-2026
    Last modifiedVulnerability information updated.

Description

Telegram Desktop 2.9.2 contains a denial of service vulnerability that allows attackers to crash the application by sending an oversized message payload. Attackers can generate a 9 million byte buffer and paste it into the messaging interface to trigger an application crash.

CVSS metrics

5 scores · 3 sources · 2 versions

EPSS trend

Probability

0.50%

Chance of exploitation in the next 30 days

Percentile

42%

Versus all other CVEs

30-day change

-0.01 pp

From 0.51% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.50%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • exploit-databasedoswindowsVerified

    Telegram Desktop 2.9.2 - Denial of Service (PoC)

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • telegram-desktopAll versions (No fix recorded)
Telegram1 product

2 vendors · 2 products

References

4 links