CVE-2014-2120 — Cisco Adaptive Security Appliance (ASA) Cross-Site Scripting (XSS) Vulnerability

In brief

Severity · CVSS: Medium6.1CVSS 3.1, Medium
EPSS: 23%
CISA KEV: Known exploited, listed since 12 Nov 2024
CERT-FR: No advisory or alert referenced in the catalog
Vendor: Cisco
Published · Modified: 19 Mar 2014 · 17 Jun 2026
Last verified: 1 Oct 2026 at 09:31 UTC

Summary

Cross-site scripting (XSS) vulnerability in the WebVPN login page in Cisco Adaptive Security Appliance (ASA) Software allows remote attackers to inject arbitrary web script or HTML via an unspecified parameter, aka Bug ID CSCun19025.

Weakness: CWE-79

Title, description and the vendor's statements are quoted from the CVE record; a vendor's advisory is summarised in Patcharo's words, with a link.

Affected and fixed versions

Per product and release branch, as the vendor's CVE record and official advisory state them. A fixed release is shown only when a document names it: the vendor's, or CERT-FR's for Check Point, with its source.

No precise fixed release is published in the sources Patcharo follows.

Remediation

CISA required action

CISA KEV required action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

CISA due date: 3 Dec 2024

SourceCISA KEV

Last verified 1 Oct 2026 at 09:31 UTC

Known exploitation

Added to CISA KEV on 12 Nov 2024

Federal remediation due date: 3 Dec 2024

The CISA required action is shown under Remediation.

23% probability of exploitation in the next 30 days (percentile 98%).

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CERT-FR

No CERT-FR advisory or alert of the last two years references this CVE, for the vendors Patcharo covers.

Timeline

19 Mar 2014Published by the source
12 Nov 2024Added to CISA KEV
3 Dec 2024CISA remediation due date
17 Jun 2026Source record last modified
29 Sept 2026EPSS score computed
1 Oct 2026Last verified by Patcharo

Official sources

Cisco (CVE record)retrieved 1 Oct 2026 at 09:31 UTC
CISA Known Exploited Vulnerabilitiesretrieved 1 Oct 2026 at 09:28 UTC
NVDretrieved 27 Sept 2026 at 23:44 UTC
FIRST EPSSretrieved 30 Sept 2026 at 00:17 UTC

References

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2014-2120

Cisco · CISA Known Exploited Vulnerabilities · NVD · FIRST EPSS

How Patcharo reads this

Affected and fixed releases come from the vendor's structured statements and are matched against exact versions; CVSS from NVD, exploitation from CISA KEV and the vendor's own advisory, probability from FIRST EPSS. Missing data stays Unknown and never becomes Not affected.

Read the methodology Read the guide: Cisco Secure Firewall release trains: Threat Defense, Management Center and ASA versions explained