CVE-2018-17780

mediumpriority · track · 27EPSS 0.018 · 78 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.80% (78th) EPSS

CVSS 4 · medium

Is it mine?

3 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

Telegram Desktop (aka tdesktop) 1.3.14, and Telegram 3.3.0.0 WP8.1 on Windows, leaks end-user public and private IP addresses during a call because of an unsafe default behavior in which P2P connections are accepted from clients outside of the My Contacts list.

cvss

Technical severity, 0–10. One row per scoring source.

6.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04mediumAV:N/AC:L/Au:S/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 8 · impact 2.9

v3.06.5mediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 3.6

v3.06mediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-200USprimary

affected products (3)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
telegram telegram desktop= 1.3.14nvdUScpe:2.3:a:telegram:telegram_desktop:*:*:*:*:*:*:*:*
telegram telegram messenger= 3.3.0.0nvdUScpe:2.3:a:telegram:telegram_messenger:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2018-09-29modified 2026-06-17

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+19393 more

references (5)

External citations — patches, advisories, analysis.

https://www.inputzero.io/2018/09/bug-bounty-telegram-cve-2018-17780.html cnnvd
http://www.securityfocus.com/bid/105521 enisa_euvd
https://www.inputzero.io/2018/09/bug-bounty-telegram-cve-2018-17780.html enisa_euvd
http://www.securityfocus.com/bid/105521Third Party AdvisoryVDB Entrynvd
https://www.inputzero.io/2018/09/bug-bounty-telegram-cve-2018-17780.htmlExploitThird Party Advisorynvd

scry

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