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CVE-2020-3452

A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to conduct directory traversal attacks and read sensitive files on a targeted system…

Read full description
A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to conduct directory traversal attacks and read sensitive files on a targeted system. The vulnerability is due to a lack of proper input validation of URLs in HTTP requests processed by an affected device. An attacker could exploit this vulnerability by sending a crafted HTTP request containing directory traversal character sequences to an affected device. A successful exploit could allow the attacker to view arbitrary files within the web services file system on the targeted device. The web services file system is enabled when the affected device is configured with either WebVPN or AnyConnect features. This vulnerability cannot be used to obtain access to ASA or FTD system files or underlying operating system (OS) files.
CVSS 7.5 (HIGH) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.6/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 7.5: +1.12
  • 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

CyberSecurityNews
Press · 05 Sep 2025, 07:00 · Hackers Scanning Cisco ASA Devices to Exploit Vulnerabilities from 25,000 IPs - CyberSecurityNews
GreyNoise
Press · 04 Sep 2025, 07:00 · 25,000 IPs Scanned Cisco ASA Devices — New Vulnerability Potentially Incoming - GreyNoise
Help Net Security
Press · 03 Feb 2021, 08:00 · Top 10 most exploited vulnerabilities from 2020 - Help Net Security
Help Net Security
Press · 27 Jul 2020, 07:00 · Attackers are exploiting Cisco ASA/FTD flaw in search for sensitive data - Help Net Security
BleepingComputer
Press · 24 Jul 2020, 07:00 · Cisco patches ASA/FTD firewall flaw actively exploited by hackers - BleepingComputer
See all 11 source documents
SOC Prime
Press · 23 Jul 2020, 07:00 · CVE-2020-3452: Unauthenticated File Read in Cisco ASA & Cisco Firepower Detection - SOC Prime
Rapid7
Press · 23 Jul 2020, 07:00 · CVE-2020-3452 Cisco ASA / Firepower Vulnerability Details - Rapid7
SOC Prime
Press · 10 Jul 2020, 07:00 · Rule of the Week: Evasive DLL Loading / AWL Bypass - SOC Prime
SOC Prime
Press · 03 Jul 2020, 07:00 · Rule of the Week: Thanos Ransomware - SOC Prime
SOC Prime
Press · 15 May 2020, 07:00 · Rule of the Week: Nefilim/Nephilim Ransomware Detection - SOC Prime
Rapid7
Press · 08 Nov 2016, 08:00 · Election Day: Tracking the Mirai Botnet - Rapid7

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 8.6 (2026-11-02 15:12). The curve appears once the score changes.

Public exploit evidence

3

Public exploit entries / repo candidates

See 2 repos with metrics
RepositoryStarsForksLanguageUpdated
faisalfs10x/Cisco-CVE-2020-3452-shodan-scanner22Shell04 Feb 2021, 17:38
XDev05/CVE-2020-3452-PoC20Shell24 Jul 2020, 00:49
Public exploit evidence
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 7.5; 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 13:58:18.514971+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
First press mention
08 Nov 2016, 08:00
Published
22 Jul 2020, 20:00
Added to the CISA KEV catalog
03 Nov 2021, 00:00
Latest press mention
05 Sep 2025, 07:00
Score calculated
05 Nov 2026, 13:58
PoCs on GitHub
3 repositories
Source: CVE List V5 · CISA KEV · FIRST EPSS · GitHub · RSSVulnRadar