9.8

CVE-2020-14993: draytek vigor2960 Out-of-bounds Write

CVSS: 9.8v3.1CriticalModified
Published 23-06-2020Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-14993 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in draytek vigor2960. EPSS estimates a 5.54% chance of exploitation in the next 30 days, higher than 92.7% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
5.54%
0%100%
Low · +0.22 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Timeline

  1. 23-06-2020
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

A stack-based buffer overflow on DrayTek Vigor2960, Vigor3900, and Vigor300B devices before 1.5.1.1 allows remote attackers to execute arbitrary code via the formuserphonenumber parameter in an authusersms action to mainfunction.cgi.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

5.54%

Chance of exploitation in the next 30 days

Percentile

93%

Versus all other CVEs

30-day change

+0.22 pp

From 5.33% on 21-09-2026

21-09-202621-10-2026
EPSS score
5.54%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Vigor Poc

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Draytek3 products

1 vendor · 3 products

References

3 links