VulnRadar

Data against noise.

Page generated: 11 Nov 2026, 03:45 UTC

CVE-2026-20349

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A vulnerability in the Remote Access SSL VPN service for Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition.  This vulnerability is due to insufficient error checking when processing HTTP requests. An attacker could exploit this vulnerability by sending a crafted HTTP request to the Remote Access SSL VPN service on an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.

CVSS 8.6 (HIGH) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE

0.0/10

REALITY · THREAT PRIORITY

8.3/10

General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?

Recorded exploitation baseline: +7.00
Technical severity: CVSS 8.6: +1.29
Fresh EPSS: 1.01%: +0.01

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

Sources: 13 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

https://tech-insider.org/

Press · 24 Aug 2026, 07:00 · Cisco ASA/FTD Zero-Day: CVSS 8.6, No Workaround [2026] - https://tech-insider.org/

PCQuest

Press · 13 Aug 2026, 07:00 · Hackers are exploiting CVE 2026 20349 to crash Cisco firewalls - PCQuest

Help Net Security

Press · 13 Aug 2026, 07:00 · Cisco fixes vulnerability exploited to DoS its firewalls (CVE-2026-20349) - Help Net Security

Security Affairs

Press · 13 Aug 2026, 07:00 · U.S. CISA adds Metabase, Windows, and Cisco Secure Firewall flaws to its Known Exploited Vulnerabilities ca... - Security Affairs

CyberSecurityNews

Press · 13 Aug 2026, 04:38 · Cisco Firewall 0-Day Vulnerability Exploited in the Wild to Trigger DoS Condition - CyberSecurityNews

See all 13 source documents

SOC Prime

Press · 12 Aug 2026, 07:00 · CVE-2026-20349: Cisco ASA and FTD VPN DoS Flaw - SOC Prime

Neowin

Press · 12 Aug 2026, 07:00 · Cisco pushes urgent patches for actively exploited zero-day flaw crashing firewalls - Neowin

SOCRadar

Press · 12 Aug 2026, 07:00 · Cisco ASA and FTD CVE-2026-20349 Exploited - SOCRadar

The Hacker News

Press · 12 Aug 2026, 07:00 · Cisco ASA and FTD Flaw Exploited in the Wild Can Trigger Remote DoS - The Hacker News

SecurityWeek

Press · 12 Aug 2026, 07:00 · Cisco Patches Firewall Zero-Day Exploited for DoS Attacks - SecurityWeek

Cybersecurity Dive

Press · 12 Aug 2026, 07:00 · Cisco says software vulnerability could let hackers crash firewalls - Cybersecurity Dive

Hong Kong Computer Emergency Response Team Coordination Centre

Press · 12 Aug 2026, 07:00 · Cisco Products Multiple Vulnerabilities - Hong Kong Computer Emergency Response Team Coordination Centre

BleepingComputer

Press · 11 Aug 2026, 07:00 · Cisco warns of ASA and FTD VPN flaw exploited to crash devices - BleepingComputer

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 8.3 (2026-11-02 15:14). The curve appears once the score changes.

Public exploit evidence

Public exploit entries / repo candidates

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 8.6; EPSS 1.0%
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 14:00:01.230559+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline

Added to the CISA KEV catalog

11 Aug 2026, 00:00

First press mention

11 Aug 2026, 07:00

Published

11 Aug 2026, 17:06

Latest press mention

24 Aug 2026, 07:00

Score calculated

05 Nov 2026, 14:00