CVE-2021-21818: dlink dir-3040_firmware Use of Hard-coded Password
Vulnerability summary
CVE-2021-21818 is a high (CVSS 7.5) Use of Hard-coded Password vulnerability in dlink dir-3040_firmware. EPSS estimates a 1.69% chance of exploitation in the next 30 days, higher than 76.7% of scored vulnerabilities. 1 public exploit is recorded.
Timeline
- 16-07-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
A hard-coded password vulnerability exists in the Zebra IP Routing Manager functionality of D-LINK DIR-3040 1.13B03. A specially crafted network request can lead to a denial of service. An attacker can send a sequence of requests to trigger this vulnerability.
CVSS metrics
4 scores · 2 sources · 3 versions- NVDNIST7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
1.69%
Chance of exploitation in the next 30 days
Percentile
77%
Versus all other CVEs
30-day change
0.00 pp
From 1.69% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (talosintelligence.com)
Maturity: unknown
Weaknesses
CWE · root cause- CWE-259Use of Hard-coded PasswordThe product contains a hard-coded password, which it uses for its own inbound authentication or for outbound communication to external components.
- CWE-798Use of Hard-coded CredentialsThe product contains hard-coded credentials, such as a password or cryptographic key.
Affected systems
Dlink1 product
- dir-3040_firmware1.13b03
1 vendor · 1 product
References
1 links- talosintelligence.com/vulnerability_reports/TALOS-2021-1283X Refsource MISCExploitThird Party Advisory