CVE-2018-6211 json
On D-Link DIR-620 devices with a certain customized (by ISP) variant of firmware 1.0.3, 1.0.37, 1.3.1, 1.3.3, 1.3.7, 1.4.0, and 2.0.22, OS…
published 2018-06-20 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-17972
- cvss
- 7.2
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 5.7%
- EPSS 5.7% chance of exploitation in 30 days, percentile 93%
- public exploits
- 0
- none known
Summary
On D-Link DIR-620 devices with a certain customized (by ISP) variant of firmware 1.0.3, 1.0.37, 1.3.1, 1.3.3, 1.3.7, 1.4.0, and 2.0.22, OS command injection is possible as a result of incorrect processing of the res_buf parameter to index.cgi.
Exploit prediction
5.68% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- securelist.com https://securelist.com/backdoors-in-d-links-backyard/85530/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 7.2 | CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 9.0 | AV:N/AC:L/Au:S/C:C/I:C/A:C |
Classification
- Weakness
-
- CWE-78 Improper Neutralization of Special Elements used in an OS Command
References
-
securelist.com
/backdoors-in-d-links-backyard/85530/
exploit, third-party-advisory
-
securityaffairs.co
/wordpress/72839/hacking/d-link-dir-620-flaws.html
third-party-advisory
-
bleepingcomputer.com
/news/security/backdoor-account-found-in-d-link-dir-620-routers/
third-party-advisory
-
securitynewspaper.com
/2018/05/25/d-link-dir-620-routers-critical-vulnerabilities/
third-party-advisory
Sources
- CVE List CVE-2018-6211
- NVD CVE-2018-6211
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.