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CVE-2020-25506

98
FAUCET Score

CVE-2020-25506 is a critical command injection vulnerability affecting D-Link DNS-320 firmware v2.06B01 Revision Ax, specifically within the system_mgr.cgi component. This flaw allows unauthenticated remote attackers to execute arbitrary code with maximum impact on confidentiality, integrity, and availability. With a CVSS score of 9.8 and an EPSS score indicating high exploitability, this vulnerability is actively exploited in the wild, as evidenced by its inclusion in CISA's KEV catalog. While no Metasploit or ExploitDB modules exist, Nuclei templates are available, and the vulnerability has garnered significant community discussion and media coverage, often linked to botnet activity like Mirai and Zerobot.

Impacted Technologies

VendorProductVersion(s)CPE
2.06b01CPE matchmatch criteria
cpe:2.3:o:dlink:dns-320_firmware:2.06b01:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
99.97%
Probability of exploitation in next 30 days
EPSS Percentile
100.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Added to KEV · Nov 3, 2021
Nuclei: CVE-2020-25506 · Jul 15, 2021
This CVE's current EPSS score of 0.9997 is in the 100th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
gist.github.com / WinMin/6f63fd1ae95977e0e2d49bd4b5f00675
ExploitThird Party Advisory
supportannouncement.us.dlink.com / announcement/publication.aspx
Vendor Advisory
dlink.com / en/security-bulletin
Vendor Advisory