What is CVE-2018-25285?

CVE-2018-25285 is a medium-severity vulnerability in Fathom, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 5.5/10. Published 2026-04-26.

How severe is CVE-2018-25285?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Buffer overflow in Fathom

CVE-2018-25285

Fathom 2.4 contains a buffer overflow vulnerability in the Authorization Code field that allows local attackers to crash the application by submitting an oversized input string. Attackers can paste a 6000-byte payload into the Authorizatio…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (5.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Fathom — versions 2.4

Weakness classification (CWE)

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

References

ExploitDB-45294 (exploit)
Official Product Homepage (product)
Product Reference (product)
VulnCheck Advisory: Fathom 2.4 Denial of Service via Authorization Code Buffer Overflow (third-party-advisory)

Frequently asked questions

What is CVE-2018-25285?: CVE-2018-25285 is a medium-severity vulnerability in Fathom, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 5.5/10. Published 2026-04-26.
How severe is CVE-2018-25285?: Medium severity. CVSS v3 base score is 5.5 out of 10.