What is CVE-2020-7845?

CVE-2020-7845 is a high-severity vulnerability in Jiransecurity Spamsniper, classified under Stack-based Buffer Overflow. CVSS score: 8.1/10. Published 2020-12-27.

How severe is CVE-2020-7845?

High severity. CVSS v3 base score is 8.1 out of 10.

Buffer overflow in Jiransecurity Spamsniper

CVE-2020-7845

Spamsniper 5.0 ~ 5.2.7 contain a stack-based buffer overflow vulnerability caused by improper boundary checks when parsing MAIL FROM command. It leads remote attacker to execute arbitrary code via crafted packet.

Vulnerability class: Buffer Overflow

Published 2020-12-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.028 (85.9th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 85.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.027 · newest: 0.028 · change: +0.001

Affected products

Jiransecurity Spamsniper — versions 5.2.7

Weakness classification (CWE)

References

www.jiransecurity.com/ (Vendor Advisory)
www.krcert.or.kr/krcert/secNoticeView.do (Third Party Advisory)

Frequently asked questions

What is CVE-2020-7845?: CVE-2020-7845 is a high-severity vulnerability in Jiransecurity Spamsniper, classified under Stack-based Buffer Overflow. CVSS score: 8.1/10. Published 2020-12-27.
How severe is CVE-2020-7845?: High severity. CVSS v3 base score is 8.1 out of 10.