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Page generated: 11 Nov 2026, 11:43 UTC
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CVE-2024-20359

A vulnerability in a legacy capability that allowed for the preloading of VPN clients and plug-ins and that has been available in Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, local attacker to exe…

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A vulnerability in a legacy capability that allowed for the preloading of VPN clients and plug-ins and that has been available in Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, local attacker to execute arbitrary code with root-level privileges. Administrator-level privileges are required to exploit this vulnerability. This vulnerability is due to improper validation of a file when it is read from system flash memory. An attacker could exploit this vulnerability by copying a crafted file to the disk0: file system of an affected device. A successful exploit could allow the attacker to execute arbitrary code on the affected device after the next reload of the device, which could alter system behavior. Because the injected code could persist across device reboots, Cisco has raised the Security Impact Rating (SIR) of this advisory from Medium to High.
CVSS 6.0 (MEDIUM) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.0/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 6: +0.90
  • Fresh EPSS: 18.82%: +0.09

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

Rescana
Press · 09 Nov 2025, 08:00 · Cisco ASA and FTD Firewall Vulnerabilities: Active Exploitation of CVE-2025-20333 and CVE-2025-20362 Enables DoS Attacks and Full Device Compromise - Rescana
The Hacker News
Press · 06 May 2024, 07:00 · China-Linked Hackers Suspected in ArcaneDoor Cyberattacks Targeting Network Devices - The Hacker News
Arctic Wolf
Press · 29 Apr 2024, 07:00 · Recommendations for CVE-2024-20353 and CVE-2024-20359 - Arctic Wolf
TechTarget
Press · 25 Apr 2024, 07:00 · Cisco zero-day flaws in ASA, FTD software under attack - TechTarget
The Hacker News
Press · 25 Apr 2024, 07:00 · State-Sponsored Hackers Exploit Two Cisco Zero-Day Vulnerabilities for Espionage - The Hacker News
See all 11 source documents
CERT-FR
Technical advisory · 25 Apr 2024, 00:00 · Multiples vulnérabilités dans les produits Cisco (25 avril 2024)
CERT-FR
Press · 25 Apr 2024, 00:00 · Multiples vulnérabilités dans les produits Cisco (25 avril 2024)
Cisco Talos Blog
Press · 24 Apr 2024, 07:00 · ArcaneDoor - New espionage-focused campaign found targeting perimeter network devices - Cisco Talos Blog
National Cyber Security Centre
Press · 24 Apr 2024, 07:00 · Exploitation of vulnerabilities affecting Cisco firewall platforms - National Cyber Security Centre
Help Net Security
Press · 24 Apr 2024, 07:00 · Hackers backdoored Cisco ASA devices via two zero-days (CVE-2024-20353, CVE-2024-20359) - Help Net Security
The Record from Recorded Future News
Press · 24 Apr 2024, 07:00 · CISA: Cisco and CrushFTP vulnerabilities are being actively exploited - The Record from Recorded Future News

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 8.0 (2026-11-02 15:13). The curve appears once the score changes.

Public exploit evidence

0

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 6; EPSS 18.8%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
local access, high 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 13:59:08.088796+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
Added to the CISA KEV catalog
24 Apr 2024, 00:00
First press mention
24 Apr 2024, 07:00
Published
24 Apr 2024, 18:16
Latest press mention
09 Nov 2025, 08:00
Score calculated
05 Nov 2026, 13:59
Source: CVE List V5 · CISA KEV · FIRST EPSS · GitHub · RSSVulnRadar