VulnRadar

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Page generated: 07 Nov 2026, 05:01 UTC

CVE-2020-8515

DrayTek Vigor2960 1.3.1_Beta, Vigor3900 1.4.4_Beta, and Vigor300B 1.3.3_Beta, 1.4.2.1_Beta, and 1.4.4_Beta devices allow remote code execution as root (without authentication) via shell metacharacters to the cgi-bin/mainfunction.cgi URI. This issue has been fixed in Vigor3900/296…

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CVSS 9.8 (CRITICAL) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE

0.0/10

REALITY · THREAT PRIORITY

9.0/10

General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?

Recorded exploitation baseline: +7.00
Technical severity: CVSS 9.8: +1.47
Fresh EPSS: 99.99%: +0.50

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 11 documents and public datasets.

Hype components

Headline sample (25%)

0/100

Press, 30 days (60%)

0/100

Grounded branding (15%)

0/100

HYPE TOTAL0/100

Sources and documents

Recorded Future

Press · 07 Aug 2026, 07:00 · July 2026 CVE Landscape - Recorded Future

奇安信X 实验室

Press · 29 Jul 2026, 07:00 · Botnet Rising Star: The Evolution and In-Depth Technical Analysis of Dysphoria - 奇安信X 实验室

Cybersecurity Dive

Press · 26 Mar 2025, 07:00 · DrayTek routers face active exploitation of older vulnerabilities - Cybersecurity Dive

GreyNoise

Press · 25 Mar 2025, 07:00 · Amid Reports of Worldwide Reboots, GreyNoise Observes In-the-Wild Activity Against DrayTek Routers - GreyNoise

The Hacker News

Press · 22 Jan 2025, 08:00 · Hackers Exploit Zero-Day in cnPilot Routers to Deploy AIRASHI DDoS Botnet - The Hacker News

See all 11 source documents

ISPreview UK

Press · 03 Oct 2024, 07:00 · Serious Security Vulnerabilities Exposed in 704,525 DrayTek Routers UPDATE - ISPreview UK

Unit 42

Press · 15 Feb 2023, 08:00 · Mirai Variant V3G4 Targets IoT Devices - Unit 42

Check Point Research

Press · 15 Nov 2021, 08:00 · 15th November – Threat Intelligence Report - Check Point Research

Unit 42

Press · 22 Jan 2021, 08:00 · Network Attack Trends: Internet of Threats (August-October 2020) - Unit 42

Bitsight

Press · 23 Oct 2020, 07:00 · Bitsight’s View into the NSA’s Top Vulnerabilities - Bitsight

Unit 42

Press · 03 Apr 2020, 07:00 · Grandstream and DrayTek Devices Exploited to Power New Hoaxcalls DDoS Botnet - Unit 42

Score evolution

● Hype ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 9.0 (2026-11-02 15:12). The curve appears once the score changes.

Public exploit evidence

Public exploit entries / repo candidates

See 2 repos with metrics

Repository	Stars	Forks	Language	Updated
imjdl/CVE-2020-8515-PoC	14	9	Python	30 Mar 2020, 03:33
darrenmartyn/CVE-2020-8515	5	4	Python	04 Sep 2021, 10:45

Public exploit evidence

exploitdb #48268 2020-03-30

Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence: Exploitation recorded
Priority basis: Recorded exploitation; CVSS 9.8; EPSS 100.0%
Attention, last 30 days: 0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential: network access, no prior privileges, no user interaction.
Observed activity: Exploitation recorded in CISA KEV.
Known scale: Not quantified.
Evidence confidence basis: Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:58:20.659321+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline

Published

01 Feb 2020, 12:36

First press mention

03 Apr 2020, 07:00

Added to the CISA KEV catalog

03 Nov 2021, 00:00

Latest press mention

07 Aug 2026, 07:00

Score calculated

05 Nov 2026, 13:58

PoCs on GitHub

2 repositories