CVE-2021-21816 json
An information disclosure vulnerability exists in the Syslog functionality of D-LINK DIR-3040 1.13B03.
published 2021-07-16 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-8987
- cvss
- 6.5
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 32.4%
- EPSS 32.4% chance of exploitation in 30 days, percentile 98%
- public exploits
- 0
- none known, plus a Nuclei check
Summary
An information disclosure vulnerability exists in the Syslog functionality of D-LINK DIR-3040 1.13B03. A specially crafted network request can lead to the disclosure of sensitive information. An attacker can send an HTTP request to trigger this vulnerability.
Exploit prediction
32.39% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Nuclei template D-Link DIR-3040 1.13B03 - Information Disclosure nuclei detection template
- talosintelligence.com https://talosintelligence.com/vulnerability_reports/TALOS-2021-1281 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 6.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |
| NVD | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:P/I:N/A:N |
Affected products
- n/a D-LINK
Classification
- Weakness
-
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
References
-
talosintelligence.com
/vulnerability_reports/TALOS-2021-1281
exploit, third-party-advisory
Sources
- CVE List CVE-2021-21816
- NVD CVE-2021-21816
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.