What is CVE-2015-7874?

CVE-2015-7874 is a critical-severity vulnerability in Portapps Kitty Portable, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2020-01-15.

How severe is CVE-2015-7874?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2015-7874 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Portapps Kitty Portable

CVE-2015-7874

Buffer overflow in the chat server in KiTTY Portable 0.65.0.2p and earlier allows remote attackers to execute arbitrary code via a long nickname.

Vulnerability class: Buffer Overflow

Published 2020-01-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.139 (96.4th percentile), scored 2026-09-28.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 96.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.139 · newest: 0.139 · change: 0.000

Affected products

Portapps Kitty Portable

Weakness classification (CWE)

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

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

www.exploit-db.com/exploits/39119/ (Exploit, VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2015-7874?: CVE-2015-7874 is a critical-severity vulnerability in Portapps Kitty Portable, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2020-01-15.
How severe is CVE-2015-7874?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2015-7874 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.