CVE-2018-12103: An issue was discovered on D-Link DIR-890L with firmware 1.21B02beta01 and earlier, DIR-885L/R with firmware 1

Q: How do I fix CVE-2018-12103?

dir-890l firmware: upgrade to newer than 1.21b02beta01; dir-885l\/r firmware: upgrade to newer than 1.21b03beta01; dir-895l\/r firmware: upgrade to newer than 1.21b04beta01. Exact commands for each OS are on this page.

Q: Is CVE-2018-12103 being exploited?

CVE-2018-12103 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-2018-12103 affect?

CVE-2018-12103 affects dir-890l firmware, dir-885l\/r firmware, dir-895l\/r firmware. Severity is medium (CVSS 6.5). An issue was discovered on D-Link DIR-890L with firmware 1.21B02beta01 and earlier, DIR-885L/R with firmware 1.21B03beta01 and earlier, and DIR-895L/R with firmware 1.21B04beta04 and earlier devices (all hardware revisions). Due to the pred

Q: How urgent is CVE-2018-12103?

Priority 33/100. No elevated risk signals yet.

Routine

MEDIUM 6.5UPGRADEUPGRADEUPGRADE

CVE-2018-12103 is a medium-severity flaw (CVSS 6.5) affecting dir-890l firmware, dir-885l\/r firmware, dir-895l\/r firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered on D-Link DIR-890L with firmware 1.21B02beta01 and earlier, DIR-885L/R with firmware 1.21B03beta01 and earlier, and DIR-895L/R with firmware 1.21B04beta04 and earlier devices (all hardware revisions). Due to the predictability of the /docs/captcha_(number).jpeg URI, being local to the network, but unauthenticated to the administrator's panel, an attacker can disclose the CAPTCHAs used by the access point and can elect to l

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 61%)
CISA exploited list	No
Weakness	CWE-863
Published	2018-07-05
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: d-link · dlink

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

Am I affected?

Timeline

2018-07-05 20:29 UTCPublished CVE record published
2026-06-17 01:37 UTCUpdated Record last modified

dlink dir-890l firmware UPGRADE

Affected: <= 1.21b02beta01

Fixed in: newer than 1.21b02beta01

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.

d-link dir-885l\/r firmware UPGRADE

Affected: <= 1.21b03beta01

Fixed in: newer than 1.21b03beta01

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.

d-link dir-895l\/r firmware UPGRADE

Affected: <= 1.21b04beta01

Fixed in: newer than 1.21b04beta01

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-2018-12103?

dir-890l firmware: upgrade to newer than 1.21b02beta01; dir-885l\/r firmware: upgrade to newer than 1.21b03beta01; dir-895l\/r firmware: upgrade to newer than 1.21b04beta01. Exact commands for each OS are on this page.

Is CVE-2018-12103 being exploited?

CVE-2018-12103 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-2018-12103 affect?

CVE-2018-12103 affects dir-890l firmware, dir-885l\/r firmware, dir-895l\/r firmware. Severity is medium (CVSS 6.5). An issue was discovered on D-Link DIR-890L with firmware 1.21B02beta01 and earlier, DIR-885L/R with firmware 1.21B03beta01 and earlier, and DIR-895L/R with firmware 1.21B04beta04 and earlier devices (all hardware revisions). Due to the pred

How urgent is CVE-2018-12103?

Priority 33/100. No elevated risk signals yet.

Software pages

D-Link vulnerabilities

Related CVEs

CVE-2025-8231 MEDIUM 6.8 UPGRADE A vulnerability, which was classified as critical, has been found in D-Link DIR-890L up to 111b04
CVE-2025-4340 MEDIUM 6.3 UPGRADE UPGRADE A vulnerability classified as critical has been found in D-Link DIR-890L and DIR-806A1 up to 100CNb11/108B03
CVE-2022-30521 CRITICAL 9.8 UPGRADE The LAN-side Web-Configuration Interface has Stack-based Buffer Overflow vulnerability in the D-Link Wi-Fi rou
CVE-2022-29778 HIGH 8.8 UPGRADE D-Link DIR-890L 1.20b01 allows attackers to execute arbitrary code due to the hardcoded option Wake-On-Lan for
CVE-2017-14948 CRITICAL 9.8 MITIGATE MITIGATE Certain D-Link products are affected by: Buffer Overflow

References

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