October 13, 2026

CVE Watchtower

← Back to CVE List

CVE-2020-3580NVD

Vulnerability Summary

Multiple vulnerabilities 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 cross-site scripting (XSS) attacks against a user of the web services interface of an affected device. The vulnerabilities are due to insufficient validation of user-supplied input by the web services interface of an affected device. An attacker could exploit these vulnerabilities by persuading a user of the interface to click a crafted link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the interface or allow the attacker to access sensitive, browser-based information. Note: These vulnerabilities affect only specific AnyConnect and WebVPN configurations. For more information, see the Vulnerable Products section.
Severity Level
MEDIUM(6.1)
Published Date
Oct 21, 2020
Last Modified
Aug 11, 2026
PoC
Available(Nuclei)
Exploitation Status
ACTIVE
EPSS Score (30-Day)
85.58%Probability
Root Weakness (CWE)
CWE-79: Cross-site Scripting (XSS) ↗
The software does not neutralize user-controllable input before it is placed in output that is used as a web page.
CVSS v3.1 Base Metrics — Score 6.1 (MEDIUM)
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionRequired
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

Affected & Patched Versions

Affected Versions
  • Cisco Secure Firewall Threat Defense < 6.4.0.12
  • Cisco Secure Firewall Threat Defense >= 6.5.0 and < 6.6.4
  • Cisco Secure Firewall Threat Defense >= 6.7.0 and < 6.7.0.2
  • Cisco Adaptive Security Appliance Software < 9.8.4.34
  • Cisco Adaptive Security Appliance Software >= 9.9 and < 9.9.2.85
  • Cisco Adaptive Security Appliance Software >= 9.10 and < 9.12.4.13
  • Cisco Adaptive Security Appliance Software >= 9.13 and < 9.13.1.21
  • Cisco Adaptive Security Appliance Software >= 9.14 and < 9.14.2.8
  • Cisco Adaptive Security Appliance Software >= 9.15 and < 9.15.1.15
Patched Versions
  • Cisco Secure Firewall Threat Defense 6.4.0.12
  • Cisco Secure Firewall Threat Defense 6.6.4
  • Cisco Secure Firewall Threat Defense 6.7.0.2
  • Cisco Adaptive Security Appliance Software 9.8.4.34
  • Cisco Adaptive Security Appliance Software 9.9.2.85
  • Cisco Adaptive Security Appliance Software 9.12.4.13
  • Cisco Adaptive Security Appliance Software 9.13.1.21
  • Cisco Adaptive Security Appliance Software 9.14.2.8
  • Cisco Adaptive Security Appliance Software 9.15.1.15
🎁7-Day Free Trial — Try Pro or Team, no card required.
📧Email Delivery — Threat intel straight to your inbox.
♾️Unlimited Vendors — Track your entire stack.
🚨All New CVEs — Be the first to know.
📈EPSS Spike Alerts — Catch rising risk before it peaks.
🎯Custom EPSS/CVSS — Filter noise, focus on risk.
🛡️Exploit Intel — A 2nd confirmed-exploit signal beyond KEV.
🐙GitHub Issues — Auto-tracked, no duplicates.
📬Weekly Digest — One clean summary, not inbox spam.
🏷️Watchlist Groups — Tag alerts by team (Infra/AppSec/SOC).
💬Webhooks — Slack & Teams integration.
🔀Smart Routing — Critical alerts to one channel, rest to another.
🚫Ad-Free — Uninterrupted experience.
🎁7-Day Free Trial — Try Pro or Team, no card required.
📧Email Delivery — Threat intel straight to your inbox.
♾️Unlimited Vendors — Track your entire stack.
🚨All New CVEs — Be the first to know.
📈EPSS Spike Alerts — Catch rising risk before it peaks.
🎯Custom EPSS/CVSS — Filter noise, focus on risk.
🛡️Exploit Intel — A 2nd confirmed-exploit signal beyond KEV.
🐙GitHub Issues — Auto-tracked, no duplicates.
📬Weekly Digest — One clean summary, not inbox spam.
🏷️Watchlist Groups — Tag alerts by team (Infra/AppSec/SOC).
💬Webhooks — Slack & Teams integration.
🔀Smart Routing — Critical alerts to one channel, rest to another.
🚫Ad-Free — Uninterrupted experience.

External References