CVE-2018-25285

Fathom 2.4 Denial of Service via Authorization Code Buffer Overflow

CVSS 6.8 MEDIUMEPSS 0.1%CWE-120

Vexday Risk Score

33Attention

SSVC decision (CISA)

Attend

PoC available → attend closely

Exploit maturity

Proof of concept

Public proof of concept exists, but not yet automated.

CVSS 6.8EPSS 0.1%KEV nãoPoC públicaNuclei —Metasploit —Patch —

Lifecycle

26 Apr 2026Published on NVD

Recommendation: Plan a near-term fix — a public PoC already exists.

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 Authorization Code field and click Activate to trigger a denial of service condition.

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Affected products

Fathom · Fathom

public PoCs found — 1

cve_referencewww.exploit-db.com/exploits/45294unverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

References

https://fathom.concord.org/https://fathom.concord.org/download/https://www.exploit-db.com/exploits/45294 https://www.vulncheck.com/advisories/fathom-denial-of-service-via-authorization-code-buffer-overflow