Is CVE-2023-31447 in the CISA KEV catalog?

No. CVE-2023-31447 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-31447?

CVE-2023-31447 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2023-31447?

CVE-2023-31447 has an EPSS score of 0.86% (54th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-31447?

Upgrade vigor2620 firmware to 3.9.8.4 or later.

CVE & CISA-KEV Catalog

CVE-2023-31447

CRITICAL

9.8

CVSS v3

NVD

Description

user_login.cgi on Draytek Vigor2620 devices before 3.9.8.4 (and on all versions of Vigor2925 devices) allows attackers to send a crafted payload to modify the content of the code segment, insert shellcode, and execute arbitrary code.

CWE-94Code Injection

How to fix

Remediation Available

vigor2620 firmwareNVD

Affected:< 3.9.8.4Fixed in:3.9.8.4CVE-2023-31447derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.86%probability of exploitation in 30 days

54thpercentile

Moderate risk: more likely to be exploited than 54% of all known CVEs.

References

Third-Party Advisory1

gist.github.com

Product1

draytek.com

Related Vulnerabilities

Other CWE-94 (Code Injection) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2017-9841	Critical	9.8	100%	KEV	Fix
CVE-2015-1635	Critical	9.8	100%	KEV	-
CVE-2022-22954	Critical	9.8	100%	KEV + Ransom	-
CVE-2021-22204	Medium	6.8	100%	KEV	Fix
CVE-2025-3248	Critical	9.8	100%	KEV	Fix
CVE-2012-0158	High	8.8	100%	KEV	-

Embed a live status badge for CVE-2023-31447

Markdown

[![CVE-2023-31447](https://tridentstack.com/cve/badge/CVE-2023-31447.svg)](https://tridentstack.com/cve/CVE-2023-31447)

HTML

<a href="https://tridentstack.com/cve/CVE-2023-31447"><img src="https://tridentstack.com/cve/badge/CVE-2023-31447.svg" alt="CVE-2023-31447"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.