CVE-2022-41140: This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of mu

Q: How do I fix CVE-2022-41140?

dir-882-us firmware: upgrade to newer than 1.30b07; dir-867 firmware: upgrade to newer than 1.30b08; dir-878 firmware: upgrade to newer than 1.30b06. Exact commands for each OS are on this page.

Q: Is CVE-2022-41140 being exploited?

CVE-2022-41140 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-2022-41140 affect?

CVE-2022-41140 affects dir-882-us firmware, dir-867 firmware, dir-878 firmware. Severity is high (CVSS 8.8). This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of multiple D-Link routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the lighttpd

This month

HIGH 8.8UPGRADEUPGRADEUPGRADE

CVE-2022-41140 is a high-severity flaw (CVSS 8.8) affecting dir-882-us firmware, dir-867 firmware, dir-878 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of multiple D-Link routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the lighttpd service, which listens on TCP port 80 by default. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker c

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 35%)
CISA exploited list	No
Weakness	CWE-121, CWE-787
Published	2023-01-26
Last modified	2026-06-17

Publisher (CNA): Zero Day Initiative · Vendor: dlink

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

Am I affected?

Timeline

2023-01-26 18:59 UTCPublished CVE record published
2026-06-17 05:02 UTCUpdated Record last modified

dlink dir-882-us firmware UPGRADE

Affected: <= 1.30b07

Fixed in: newer than 1.30b07

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 dir-867 firmware UPGRADE

Affected: <= 1.30b08

Fixed in: newer than 1.30b08

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 dir-878 firmware UPGRADE

Affected: <= 1.30b06

Fixed in: newer than 1.30b06

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.

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-2022-41140?

dir-882-us firmware: upgrade to newer than 1.30b07; dir-867 firmware: upgrade to newer than 1.30b08; dir-878 firmware: upgrade to newer than 1.30b06. Exact commands for each OS are on this page.

Is CVE-2022-41140 being exploited?

CVE-2022-41140 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-2022-41140 affect?

CVE-2022-41140 affects dir-882-us firmware, dir-867 firmware, dir-878 firmware. Severity is high (CVSS 8.8). This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of multiple D-Link routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the lighttpd

How urgent is CVE-2022-41140?

Priority 47/100. High severity

Software pages

D-Link vulnerabilities · lighttpd vulnerabilities

References

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