CVE-2011-3992: Buffer overflow in the SSH server functionality on the D-Link DES-3800 with firmware before 4.50B052, DWL-2100

Q: How do I fix CVE-2011-3992?

des-3800: mitigate or apply the listed mitigation; des-3800 firmware: upgrade to newer than 4.50; dwl-2100ap: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2011-3992 being exploited?

CVE-2011-3992 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-2011-3992 affect?

CVE-2011-3992 affects des-3800, des-3800 firmware, dwl-2100ap. Severity is high (CVSS 10.0). Buffer overflow in the SSH server functionality on the D-Link DES-3800 with firmware before 4.50B052, DWL-2100AP with firmware before 2.50RC548, and DWL-3200AP with firmware before 2.55RC549 allows remote attackers to execute arbitrary code

Q: How urgent is CVE-2011-3992?

Priority 58/100. Critical severity; EPSS top 7%: very likely to be exploited

This month

HIGH 10.0MITIGATEUPGRADEMITIGATE

CVE-2011-3992 is a high-severity flaw (CVSS 10.0) affecting des-3800, des-3800 firmware, dwl-2100ap. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in the SSH server functionality on the D-Link DES-3800 with firmware before 4.50B052, DWL-2100AP with firmware before 2.50RC548, and DWL-3200AP with firmware before 2.55RC549 allows remote attackers to execute arbitrary code or cause a denial of service via unspecified vectors.

Why this priority

Critical severity
EPSS top 7%: very likely to be exploited

A fixed release or distro patch exists.

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	5.5% (top 7%)
CISA exploited list	No
Weakness	CWE-119
Published	2011-11-03
Last modified	2026-06-16

Publisher (CNA): JPCERT/CC · Vendor: dlink

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2011-11-03 17:55 UTCPublished CVE record published
2026-06-16 23:34 UTCUpdated Record last modified

dlink des-3800 MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Firmware

Install the latest firmware from the vendor advisory; if none, apply the vendor workaround.

dlink des-3800 firmware UPGRADE

Affected: <= 4.50 · 4.00

Fixed in: newer than 4.50

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.

dlink dwl-2100ap MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Firmware

Install the latest firmware from the vendor advisory; if none, apply the vendor workaround.

dlink dwl-2100ap firmware UPGRADE

Affected: <= 2.50

Fixed in: newer than 2.50

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy dwl-2100ap-firmware || rpm -q dwl-2100ap-firmware || dwl-2100ap-firmware --version

2. UPGRADE to newer than 2.50 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade dwl-2100ap-firmware

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade dwl-2100ap-firmware

Note

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

dlink dwl-3200ap MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Firmware

Install the latest firmware from the vendor advisory; if none, apply the vendor workaround.

dlink dwl-3200ap firmware UPGRADE

Affected: <= 2.55 · 2.40

Fixed in: newer than 2.55

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy dwl-3200ap-firmware || rpm -q dwl-3200ap-firmware || dwl-3200ap-firmware --version

2. UPGRADE to newer than 2.55 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade dwl-3200ap-firmware

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade dwl-3200ap-firmware

Note

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

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-2011-3992?

des-3800: mitigate or apply the listed mitigation; des-3800 firmware: upgrade to newer than 4.50; dwl-2100ap: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2011-3992 being exploited?

CVE-2011-3992 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-2011-3992 affect?

CVE-2011-3992 affects des-3800, des-3800 firmware, dwl-2100ap. Severity is high (CVSS 10.0). Buffer overflow in the SSH server functionality on the D-Link DES-3800 with firmware before 4.50B052, DWL-2100AP with firmware before 2.50RC548, and DWL-3200AP with firmware before 2.55RC549 allows remote attackers to execute arbitrary code

How urgent is CVE-2011-3992?

Priority 58/100. Critical severity; EPSS top 7%: very likely to be exploited

Software pages

D-Link vulnerabilities

Related CVEs

CVE-2013-5998 HIGH 7.8 MITIGATE MITIGATE Unspecified vulnerability in the Web manager implementation on D-Link Japan DES-3800 devices with firmware bef
CVE-2013-5997 MEDIUM 6.8 MITIGATE MITIGATE Unspecified vulnerability in the SSH implementation on D-Link Japan DES-3800 devices with firmware before R4.5

References

← Back to latest CVEs