CVE-2024-3596: RADIUS Protocol under RFC 2865 is susceptible to forgery attacks by a local attacker who can modify any valid

Q: How do I fix CVE-2024-3596?

freeradius: upgrade to 3.0.27; brocade sannav: mitigate or apply the listed mitigation; fabric operating system: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2024-3596 being exploited?

CVE-2024-3596 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2024-3596 affect?

CVE-2024-3596 affects freeradius, brocade sannav, fabric operating system. Severity is critical (CVSS 9.0). RADIUS Protocol under RFC 2865 is susceptible to forgery attacks by a local attacker who can modify any valid Response (Access-Accept, Access-Reject, or Access-Challenge) to any other response using a chosen-prefix collision attack against

Q: How urgent is CVE-2024-3596?

Priority 61/100. Critical severity; EPSS top 3%: very likely to be exploited; Remotely exploitable, no login, no user action

This week

CRITICAL 9.0REMOTEUPGRADEMITIGATEMITIGATE

CVE-2024-3596 is a critical-severity flaw (CVSS 9.0) affecting freeradius, brocade sannav, fabric operating system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

RADIUS Protocol under RFC 2865 is susceptible to forgery attacks by a local attacker who can modify any valid Response (Access-Accept, Access-Reject, or Access-Challenge) to any other response using a chosen-prefix collision attack against MD5 Response Authenticator signature.

Why this priority

Critical severity
EPSS top 3%: very likely to be exploited
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.0 (Critical)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	14.9% (top 3%)
CISA exploited list	No
Weakness	CWE-354, CWE-924
Published	2024-07-09
Last modified	2026-10-15

Publisher (CNA): CERT/CC · Vendor: broadcom · freeradius · sonicwall

Last updated 2026-10-15 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-07-09 12:15 UTCPublished CVE record published
2026-10-15 01:18 UTCUpdated Record last modified

freeradius freeradius UPGRADE

Affected: < 3.0.27

Fixed in: 3.0.27

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy freeradius || rpm -q freeradius || freeradius --version

2. UPGRADE to 3.0.27 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade freeradius

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade freeradius

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

broadcom brocade sannav MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy brocade-sannav || rpm -q brocade-sannav || brocade-sannav --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

broadcom fabric operating system MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

sonicwall sonicos MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Advisories and coverage

Official advisories

Siemens ProductCERT: SSA-794185 V1.4 (Last Update: 2026-10-13): RADIUS Protocol Susceptible to Forgery Attacks (CVE-2024-3596) - Impact to SIPROTEC, SICAM and Re 2026-10-13
Siemens ProductCERT: SSA-723487 V2.0 (Last Update: 2026-06-09): RADIUS Protocol Susceptible to Forgery Attacks (CVE-2024-3596) - Impact to SCALANCE, RUGGEDCOM an 2026-06-09

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-3596?

freeradius: upgrade to 3.0.27; brocade sannav: mitigate or apply the listed mitigation; fabric operating system: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-3596 being exploited?

CVE-2024-3596 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-3596 affect?

CVE-2024-3596 affects freeradius, brocade sannav, fabric operating system. Severity is critical (CVSS 9.0). RADIUS Protocol under RFC 2865 is susceptible to forgery attacks by a local attacker who can modify any valid Response (Access-Accept, Access-Reject, or Access-Challenge) to any other response using a chosen-prefix collision attack against

How urgent is CVE-2024-3596?

Priority 61/100. Critical severity; EPSS top 3%: very likely to be exploited; Remotely exploitable, no login, no user action

Software pages

SonicWall vulnerabilities

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References

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