Is CVE-2025-67735 in the CISA KEV catalog?

No. CVE-2025-67735 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-67735?

CVE-2025-67735 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2025-67735?

CVE-2025-67735 has an EPSS score of 0.29% (21th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-67735?

Upgrade netty on debian 11 to 1:4.1.48-4+deb11u3 or later.

CVE & CISA-KEV Catalog

CVE-2025-67735

MEDIUM

6.5

CVSS v3

NVD

Description

Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.129.Final and 4.2.8.Final, the `io.netty.handler.codec.http.HttpRequestEncoder` has a CRLF injection with the request URI when constructing a request. This leads to request smuggling when `HttpRequestEncoder` is used without proper sanitization of the URI. Any application / framework using `HttpRequestEncoder` can be subject to be abused to perform request smuggling using CRLF injection. Versions 4.1.129.Final and 4.2.8.Final fix the issue.

CWE-93

How to fix

Remediation Available

nettyDebian

Fixed in:1:4.1.48-4+deb11u3CVE-2025-67735

Fixed in:1:4.1.48-7+deb12u2CVE-2025-67735

Fixed in:1:4.1.48-10+deb13u1CVE-2025-67735

Fixed in:1:4.1.48-16CVE-2025-67735

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Exploit Intelligence

0.29%probability of exploitation in 30 days

21stpercentile

Low risk: more likely to be exploited than 21% of all known CVEs.

References

Exploit1

github.com

Related Vulnerabilities

Other CWE-93 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-61884	High	7.5	98%	KEV + Ransom	-
CVE-2022-0666	High	7.5	44%	-	Fix
CVE-2016-3115	Medium	6.4	37%	-	Fix
CVE-2024-20337	High	8.2	30%	-	Fix
CVE-2021-39172	High	8.8	29%	-	Fix
CVE-2016-4975	Medium	6.1	20%	-	Fix

Embed a live status badge for CVE-2025-67735

Markdown

[![CVE-2025-67735](https://tridentstack.com/cve/badge/CVE-2025-67735.svg)](https://tridentstack.com/cve/CVE-2025-67735)

HTML

<a href="https://tridentstack.com/cve/CVE-2025-67735"><img src="https://tridentstack.com/cve/badge/CVE-2025-67735.svg" alt="CVE-2025-67735"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-01-02.