CVE-2020-7465: The L2TP implementation of MPD before 5.9 allows a remote attacker who can send specifically crafted L2TP cont

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CRITICAL 9.8REMOTEUPGRADEUPGRADE

CVE-2020-7465 is a critical-severity flaw (CVSS 9.8) affecting mpd, stormshield network security. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The L2TP implementation of MPD before 5.9 allows a remote attacker who can send specifically crafted L2TP control packet with AVP Q.931 Cause Code to execute arbitrary code or cause a denial of service (memory corruption).

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	3.0% (top 13%)
CISA exploited list	No
Weakness	CWE-787
Published	2020-10-06
Last modified	2026-06-17

Publisher (CNA): FreeBSD · Vendor: mpd project · stormshield

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-10-06 14:15 UTCPublished CVE record published
2026-06-17 03:24 UTCUpdated Record last modified

mpd project mpd UPGRADE

Affected: < 5.9

Fixed in: 5.9

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 5.9 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mpd

Note

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

stormshield stormshield network security UPGRADE

Affected: >= 4.0.0 and < 4.3.17 · 4.4.0

Fixed in: 4.3.17

Safe to downgrade to: a release before 4.0.0

1. Check installed version

apt-cache policy stormshield-network-security || rpm -q stormshield-network-security || stormshield-network-security --version

2. UPGRADE to 4.3.17 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade stormshield-network-security

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade stormshield-network-security

Note

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

3. If no update is available yet, DOWNGRADE to a release before 4.0.0 (Debian / Ubuntu)

apt-cache madison stormshield-network-security sudo apt install stormshield-network-security=<VERSION_BEFORE_4.0.0> sudo apt-mark hold stormshield-network-security

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list stormshield-network-security sudo dnf downgrade stormshield-network-security-<VERSION_BEFORE_4.0.0> sudo dnf versionlock add stormshield-network-security

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2020-7465?

mpd: upgrade to 5.9; stormshield network security: upgrade to 4.3.17. Exact commands for each OS are on this page.

Is CVE-2020-7465 being exploited?

CVE-2020-7465 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-2020-7465 affect?

CVE-2020-7465 affects mpd, stormshield network security. Severity is critical (CVSS 9.8). The L2TP implementation of MPD before 5.9 allows a remote attacker who can send specifically crafted L2TP control packet with AVP Q.931 Cause Code to execute arbitrary code or cause a denial of service (memory corruption).

How urgent is CVE-2020-7465?

Priority 66/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2020-7466 HIGH 7.5 UPGRADE UPGRADE The PPP implementation of MPD before 5.9 allows a remote attacker who can send specifically crafted PPP authen

References

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