CVE-2024-7595Public exploitNetwork attack vector

Traffic spoofing via unauthenticated packet decapsulation

Published Feb 5, 2025 · Updated Nov 3, 2025

Source-validation failure in IETF Generic Routing Encapsulation STD 1 allows remote attackers to route spoofed traffic through exposed interfaces. Implementations accept and decapsulate GRE or GRE6 packets without authenticating or restricting the outer packet source, then forward attacker-controlled inner packets. An internet-reachable tunnel endpoint that accepts packets from arbitrary sources can act as a one-way proxy, bypass network access controls, expose private networks, or amplify denial-of-service traffic.

CVSS severity5.3
Medium
EPSS probability1.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Source-validation failure in IETF Generic Routing Encapsulation STD 1 allows remote attackers to route spoofed traffic through exposed interfaces. Implementations accept and decapsulate GRE or GRE6 packets without authenticating or restricting the outer packet source, then forward attacker-controlled inner packets. An internet-reachable tunnel endpoint that accepts packets from arbitrary sources can act as a one-way proxy, bypass network access controls, expose private networks, or amplify denial-of-service traffic.

The record

CVE
CVE-2024-7595
Published
Feb 5, 2025
Updated
Nov 3, 2025
Vendor
Internet Engineering Task Force
Product
Generic Routing Encapsulation (GRE)
Classifications
CWE-290, T1090.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 5, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=STD 1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Internet Engineering Task Force · Generic Routing Encapsulation (GRE)version=STD 1

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L
5.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-290Authentication Bypass by Spoofing
T1090.002Proxy External Proxy

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo