What is CVE-2020-36995?

CVE-2020-36995 is a high-severity vulnerability in Telnet-Lite Mocha Telnet Lite For iOS, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2026-01-29.

How severe is CVE-2020-36995?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Telnet-Lite Mocha Telnet Lite For iOS

CVE-2020-36995

Mocha Telnet Lite for iOS 4.2 contains a denial of service vulnerability that allows attackers to crash the application by manipulating the user configuration input. Attackers can overwrite the 'User' field with 350 bytes of repeated characters to trigger an application crash and prevent normal functionality.

Vulnerability class: Buffer Overflow

Published 2026-01-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (33.6th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 33.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000

Affected products

Telnet-Lite Mocha Telnet Lite For iOS — versions 4.2

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

www.exploit-db.com/exploits/48728 (exploit)
apps.apple.com/us/app/telnet-lite/id286893976 (product)
www.vulncheck.com/advisories/mocha-telnet-lite-for-ios-user-denial-of-service (third-party-advisory)

Frequently asked questions

What is CVE-2020-36995?: CVE-2020-36995 is a high-severity vulnerability in Telnet-Lite Mocha Telnet Lite For iOS, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2026-01-29.
How severe is CVE-2020-36995?: High severity. CVSS v3 base score is 7.5 out of 10.