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CVE-2020-25367

38
FAUCET Score

CVE-2020-25367 is a critical command injection vulnerability affecting D-Link DIR-823G devices with firmware V1.0.2B05, specifically within the HNAP1 protocol. An unauthenticated attacker can exploit this by injecting shell metacharacters into the Captcha field during login, leading to arbitrary web script execution. With a CVSS score of 9.8 (Critical), this vulnerability has a network attack vector, low attack complexity, and results in high impacts to confidentiality, integrity, and availability. While there is no evidence of active exploitation (not in KEV or Hot List) and no public exploit code (Metasploit, Nuclei, ExploitDB), it has garnered significant community discussion with 10 mentions, indicating awareness among security researchers.

Impacted Technologies

VendorProductVersion(s)CPE
1.0.2b05CPE matchmatch criteria
cpe:2.3:o:dlink:dir-823g_firmware:1.0.2b05:*:*:*:*:*:*:*

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
8.65%
Probability of exploitation in next 30 days
EPSS Percentile
94.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0865 is in the 90th percentile among its peer group of 36,835 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

No media coverage found for this CVE.

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

github.com / sek1th/iot/blob/master/dir823g_3.md
ExploitThird Party Advisory
dlink.com / en/security-bulletin
Not ApplicableVendor Advisory