CVE-2023-31447

CRITICALNVD 9.89.8—

9.8

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.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 70.1%
KEV: Not listed

Published

August 21, 2023

Last Modified

November 21, 2024

References (4)

cve@mitrehttps://draytek.com
cve@mitrehttps://gist.github.com/rrrrrrri/013c9eef64b265af4163478bfcf29ff4
af854a3a-2127-422b-91ae-364da2661108https://draytek.com
af854a3a-2127-422b-91ae-364da2661108https://gist.github.com/rrrrrrri/013c9eef64b265af4163478bfcf29ff4

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-94Improper Control of Generation of Code (Code Injection)

Data Freshness Timeline

(refreshed 14× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-07 15:23 UTCepss_batch
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2026-06-06 13:46 UTCepss_batch
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2026-06-05 22:46 UTCepss_batch
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2026-06-04 13:11 UTCepss_batch
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2026-06-02 20:12 UTCepss_batch
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2026-06-01 13:51 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
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2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:43 UTCepss_batch

Frequently asked(5)

What is CVE-2023-31447?

CVE-2023-31447 is a critical vulnerability published on August 21, 2023. 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.

When was CVE-2023-31447 disclosed?

CVE-2023-31447 was first published in the National Vulnerability Database on August 21, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-31447 actively exploited?

CVE-2023-31447 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 70.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

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

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

How do I remediate CVE-2023-31447?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-31447, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2023-31447

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-31447?

🔗 Related CVEs(same CWE)

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Published

Last Modified

References (4)

Frequently asked(5)

Related CVEs(same CWE)