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CVE-2020-3187

Affected software2 products, listed below
Severity9.1 Critical CVSS 3.1 3 scores
WeaknessPath traversal (CWE-22)
Published6 May 2020
Updated11 Aug 2026

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 obtain read and delete access to sensitive files on a targeted system. The vulnerability is due to a lack of proper input validation of the HTTP URL. An attacker could exploit this vulnerability by sending a crafted HTTP request containing directory traversal character sequences. An exploit could allow the attacker to view or delete arbitrary files on the targeted system. When the device is reloaded after exploitation of this vulnerability, any files that were deleted are restored. The attacker can only view and delete files within the web services file system. This file system is enabled when the affected device is configured with either WebVPN or AnyConnect features. This vulnerability can not be used to obtain access to ASA or FTD system files or underlying operating system (OS) files. Reloading the affected device will restore all files within the web services file system.

Exploitation status

Exploited

Real-world exploitation reported by VulnCheck KEV. CISA has not confirmed it.
  • CISA KEV not listed
  • VulnCheck KEV listed Exploitation reported in the wild. 1 citation · 1 exploit · earliest 2025-05-22.
  • CISA Vulnrichment no assessment published
  • Indexed PoC 5 indexed Published artifacts you can open, in Exploit-DB, GitHub PoC, Nuclei; first seen 2020-07-28.
  • EPSS 97% chance in 30 days A model's forecast, not a report of exploitation. Higher than 99.9% of all scored CVEs.

VulnCheck KEV

Exploitation evidence from VulnCheck Known Exploited Vulnerabilities (VulnCheck KEV), used under VulnCheck's community terms. View CVE-2020-3187 in VulnCheck (free account).

EvidenceSourceDetailDate
Reported exploitation security.pditechnologies.com /resources/q1-2025-cyber-threat-report 2025-05-22
Exploit reference VulnCheck XDB ccdfa2ba8e3a Exploit type: infoleak 2023-03-14

3 of these are GitHub repositories with fewer than 5 stars. They are listed for reference and don't count toward the exploitation status above.

IndexArtifactStarsFirst seen
GitHub PoC Cisco Adaptive Security Appliance Software/Cisco Firepower Threat Defense - Directory Traversal 1 2024-05-19
GitHub PoC CrackerCat/CVE-2020-3187 1 2020-07-28
GitHub PoC Batch scanning site. 2023-03-14
Exploit-DB Cisco Adaptive Security Appliance Software 9.7 - Unauthenticated Arbitrary File Deletion 2020-07-29
Nuclei Cisco Adaptive Security Appliance Software/Cisco Firepower Threat Defense - Directory Traversal

Waratek protection

Outside Waratek scope

A Java vulnerability, but not one Waratek protects. It affects only Java on a user's desktop (applets, Web Start, JavaFX, the installer), sits in a product the Waratek agent can't be installed into, or is in a package we don't expect in business applications. The decision below says which.

  • Protection none
  • Action not pursued none
  • Review human Researcher
  • Record active
Decided by Manual classification of this CVE in the legacy dataset
Finding A manual classification set this CVE's status to Outside Waratek scope, but the CVE names a tracked product.

CVSS

9.1 CRITICAL v3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N 3 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

VersionScoreBandVectorAssignerType
CVSS 3.1 9.1 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N NVD Primary published
CVSS 3.0 9.1 CRITICAL CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N psirt@cisco.com Secondary
CVSS 2.0 7.5 none AV:N/AC:L/Au:N/C:P/I:P/A:P NVD Primary

Affected software and releases

Products and versions

14 products, 22 version entries
SourceVendorProductSchemeAffected versions
nvd cisco adaptive security appliance software generic ≥ 9.6 and ＜ 9.6.4.40 · ≥ 9.8 and ＜ 9.8.4.15 · ≥ 9.9 and ＜ 9.9.2.66 · ≥ 9.10 and ＜ 9.10.1.37 · ≥ 9.12 and ＜ 9.12.3.2 · ≥ 9.13 and ＜ 9.13.1.7
nvd cisco asa 5505 firmware generic 9.6\(4\)
nvd cisco asa 5510 firmware generic 9.6\(4\)
nvd cisco asa 5512-x firmware generic 9.6\(4\)
nvd cisco asa 5515-x firmware generic 9.6\(4\)
nvd cisco asa 5520 firmware generic 9.6\(4\)
nvd cisco asa 5525-x firmware generic 9.6\(4\)
nvd cisco asa 5540 firmware generic 9.6\(4\)
nvd cisco asa 5545-x firmware generic 9.6\(4\)
nvd cisco asa 5550 firmware generic 9.6\(4\)
nvd cisco asa 5555-x firmware generic 9.6\(4\)
nvd cisco asa 5580 firmware generic 9.6\(4\)
nvd cisco asa 5585-x firmware generic 9.6\(4\)
nvd cisco secure firewall threat defense generic ≥ 6.2.3 and ＜ 6.2.3.16 · ≥ 6.3.0 and ＜ 6.3.0.6 · ≥ 6.4.0 and ＜ 6.4.0.8 · ≥ 6.5.0 and ＜ 6.5.0.4

References

URLTags
http://packetstormsecurity.com/files/158648/Cisco-Adaptive-Security-Appliance-Software-9.7-Arbitrary-File-Deletion.html Exploit, Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-path-JE3azWw43 Vendor Advisory

Timeline
Published2020-05-06By the CVE Program.
VulnCheck KEV: earliest evidence2025-05-22Date of the oldest evidence of exploitation in VulnCheck KEV's record. VulnCheck does not publish the date it listed the CVE.
NVD record modified2026-08-11NVD's own last-modified date for this record.