Threats / Cisco / CVE-2014-2120
CVE-2014-2120
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-08-04
Cisco Adaptive Security Appliance (ASA) vulnerability
Cisco ASA WebVPN login page contains a cross-site scripting vulnerability allowing remote attackers to inject arbitrary web script or HTML via an unspecified parameter.
Verdict
Today item — known-exploited.
A reflected or stored XSS flaw in the ASA WebVPN interface enables attackers to execute malicious scripts in user browsers, potentially compromising credentials or session tokens during authentication.
CISA KEV Yes · 2024-11-124EPSS 0.14029 (verify live)5CVSS 5.4 (CISA)3CISA SSVC Exploitation: active · Automatable: no · Impact: total3
01
Is it exploitable?
— the evidence, ranked above the scoreReported exploitation
5 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2024-11-12).
Probability (EPSS)
EPSS 0.14029 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
CVSS 5.4 (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N) · Affected: Cisco, Adaptive Security Appliance (ASA). Confirm exact fixed builds in the vendor advisory.CVSS — CISA-assigned via the ADP container (CVE.org), version 3.1; the CNA left no metrics, so CISA's own score is used ahead of NVD.
Weakness (CWE)
Mapped to CWE-79 Cross-site Scripting (XSS) — weakness family: Web / client.CWE assignment from the public NVD record (may be stale); the weakness class drives how the flaw is exploited.
CISA SSVC (triage disposition)
Exploitation: active · Automatable: no · Technical Impact: totalCISA's own stakeholder-specific triage inputs, published in the CVE record (CISA Coordinator role). NOTE: this is CISA's three decision points; the final Act/Attend/Track decision also requires a Mission & Well-being input not published here, so no overall decision is asserted.
Currency of the record
CISA added this to its KEV catalog 3891 days after the CVE record was published.KEV lag = CISA-KEV dateAdded − CVE.org datePublished; a floor on how long the known-exploited flaw sat in the public record before the federal catalog listed it. Severity/weakness here is CNA- or CISA-assigned (current at disclosure), independent of NVD's analysis backlog.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I craft a malicious URL containing JavaScript payload and send it to ASA administrators or users.
Business
Attackers gain ability to steal authentication credentials or session cookies from legitimate users accessing the WebVPN portal.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I inject script that redirects users to a phishing page mimicking the legitimate ASA login interface.
Business
Administrative access to critical security appliances is compromised, enabling lateral movement into protected networks.
3
Lateral reach — past segmentation narrative 3
Attacker
I execute JavaScript to modify WebVPN interface behavior or capture keystrokes during credential entry.
Business
Confidentiality and integrity of remote access infrastructure is undermined, affecting all users relying on VPN connectivity.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05