9.1

CVE-2020-25366: dlink dir-823g_firmware Missing Authorization

CVSS: 9.1v3.1CriticalModified
Published 04-11-2021Last modified 09-07-2026
Open JSON

Vulnerability summary

CVE-2020-25366 is a critical (CVSS 9.1) Missing Authorization vulnerability in dlink dir-823g_firmware. EPSS estimates a 2.46% chance of exploitation in the next 30 days, higher than 84.2% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.1/10
010
Critical · v3.1 (NVD)
EPSS score
2.46%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Timeline

  1. 04-11-2021
    PublishedVulnerability first disclosed.
  2. 09-07-2026
    Last modifiedVulnerability information updated.

Description

An issue in the component /cgi-bin/upload_firmware.cgi of D-Link DIR-823G REVA1 1.02B05 allows attackers to cause a denial of service (DoS) via unspecified vectors.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

2.46%

Chance of exploitation in the next 30 days

Percentile

84%

Versus all other CVEs

30-day change

0.00 pp

From 2.46% on 19-09-2026

19-09-202619-10-2026
EPSS score
2.46%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Iot

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Dlink1 product

1 vendor · 1 product

References

2 links