Security Digest · Vulnerability record · Known exploited
CVE-2021-40655: D-Link DIR-605 Router Information Disclosure Vulnerability
Exploited in the wild (CISA KEV). An informtion disclosure issue exists in D-LINK-DIR-605 B2 Firmware Version : 2.01MT.
CISA KEV · added 2024-05-16 CVSS 7.5 High EPSS 86.7% · p99.7
Should you act?
Exploited: patch now if you run it
CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- Yes, if you run D-Link DIR-605 Router. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2024-05-16, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2024-06-06; treat that as the outer limit, not the target.
- EPSS 86.7%, percentile 99.7: FIRST’s model estimates a 86.7% chance of exploitation activity in the next 30 days, higher than 99.7% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
What it is
An informtion disclosure issue exists in D-LINK-DIR-605 B2 Firmware Version : 2.01MT. An attacker can obtain a user name and password by forging a post request to the / getcfg.php page
CISA’s summary
D-Link DIR-605 routers contain an information disclosure vulnerability that allows attackers to obtain a username and password by forging a post request to the /getcfg.php page.
Weakness type: CWE-863.
Product: D-Link DIR-605 Router · Assigned by: mitre · Published: 2021-09-24
Affected and fixed versions
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| n/a | n/a | see vendor advisory |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADP | 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Privileges required: none (no login)
- User interaction: none
- Scope: unchanged
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: added 2024-05-16; federal due date 2024-06-06. Known ransomware use: Unknown.
- CISA required action: This vulnerability affects legacy D-Link products. All associated hardware revisions have reached their end-of-life (EOL) or end-of-service (EOS) life cycle and should be retired and replaced per vendor instructions.
- CISA SSVC assessment: exploitation active, automatable no, technical impact partial.
- FIRST EPSS (model of 2026-10-21): 86.66% probability of exploitation activity in the next 30 days; percentile 99.7.
Timeline
- — CVE record published by mitre
- — Added to CISA’s Known Exploited Vulnerabilities catalog
- — CISA remediation deadline for US federal agencies
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vendor and project advisories, patches
- Listed in CISA KEV notes (legacy.us.dlink.com) legacy.us.dlink.com
Vulnerability records
- CVE.org record CVE-2021-40655 cve.org
- NVD entry CVE-2021-40655 nvd.nist.gov
Government
Other references from the CVE record and advisory
- dlink.com dlink.com
- github.com github.com
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