CVE-2024-20359
Confirmed PUBLISHEDA vulnerability in a legacy capability that allowed for the preloading of VPN clients and plug-ins and that has been available in Cisco Adaptive...
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
A vulnerability in a legacy capability that allowed for the preloading of VPN clients and plug-ins and that has been available in Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, local attacker to execute arbitrary code with root-level privileges. Administrator-level privileges are required to exploit this vulnerability. This vulnerability is due to improper validation of a file when it is read from system flash memory. An attacker could exploit this vulnerability by copying a crafted file to the disk0: file system of an affected device. A successful exploit could allow the attacker to execute arbitrary code on the affected device after the next reload of the device, which could alter system behavior. Because the injected code could persist across device reboots, Cisco has raised the Security Impact Rating (SIR) of this advisory from Medium to High.
- CVE Published
- Apr 24, 2024
- Exploitation Reported
- Apr 24, 2024
- CVSS
- 6.0 Medium
- EPSS
- —
Affected Versions
285 version rows · page 6 of 12
| Vendor | Product | Version | Status |
|---|---|---|---|
| Cisco |
Cisco Adaptive Security Appliance (ASA) Software
|
9.14.3.15 |
Affected |
| Cisco |
Cisco Adaptive Security Appliance (ASA) Software
|
9.14.4 |
Affected |
| Cisco |
Cisco Adaptive Security Appliance (ASA) Software
|
9.14.4.6 |
Affected |
| Cisco |
Cisco Adaptive Security Appliance (ASA) Software
|
9.14.4.7 |
Affected |
| Cisco |
Cisco Adaptive Security Appliance (ASA) Software
|
9.14.4.12 |
Affected |
| Cisco |
Cisco Adaptive Security Appliance (ASA) Software
|
9.14.4.13 |
Affected |
| Cisco |
Cisco Adaptive Security Appliance (ASA) Software
|
9.14.4.14 |
Affected |
| Cisco |
Cisco Adaptive Security Appliance (ASA) Software
|
9.14.4.15 |
Affected |
| Cisco |
Cisco Adaptive Security Appliance (ASA) Software
|
9.14.4.17 |
Affected |
| Cisco |
Cisco Adaptive Security Appliance (ASA) Software
|
9.14.4.22 |
Affected |
| Cisco |
Cisco Adaptive Security Appliance (ASA) Software
|
9.14.4.23 |
Affected |
| Cisco |
Cisco Adaptive Security Appliance (ASA) Software
|
9.15.1 |
Affected |
| Cisco |
Cisco Adaptive Security Appliance (ASA) Software
|
9.15.1.7 |
Affected |
| Cisco |
Cisco Adaptive Security Appliance (ASA) Software
|
9.15.1.10 |
Affected |
| Cisco |
Cisco Adaptive Security Appliance (ASA) Software
|
9.15.1.15 |
Affected |
| Cisco |
Cisco Adaptive Security Appliance (ASA) Software
|
9.15.1.16 |
Affected |
| Cisco |
Cisco Adaptive Security Appliance (ASA) Software
|
9.15.1.17 |
Affected |
| Cisco |
Cisco Adaptive Security Appliance (ASA) Software
|
9.15.1.1 |
Affected |
| Cisco |
Cisco Adaptive Security Appliance (ASA) Software
|
9.15.1.21 |
Affected |
| Cisco |
Cisco Adaptive Security Appliance (ASA) Software
|
9.16.1 |
Affected |
| Cisco |
Cisco Adaptive Security Appliance (ASA) Software
|
9.16.1.28 |
Affected |
| Cisco |
Cisco Adaptive Security Appliance (ASA) Software
|
9.16.2 |
Affected |
| Cisco |
Cisco Adaptive Security Appliance (ASA) Software
|
9.16.2.3 |
Affected |
| Cisco |
Cisco Adaptive Security Appliance (ASA) Software
|
9.16.2.7 |
Affected |
| Cisco |
Cisco Adaptive Security Appliance (ASA) Software
|
9.16.2.11 |
Affected |
CVE References
- cisco-sa-asaftd-persist-rce-FLsNXF4h sec.cloudapps.cisco.com · CVE Record https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurity...
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Check enrichment artifacts for scanner coverage and available PoCs before rolling remediation validation.
- Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CISA First | 2024-04-24 00:00 UTC |
No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Exploitation Status
Exploited in the wild
Recorded 2024-04-24 00:00:00 UTC · CISA
Weaknesses (CWE)
-
Improper Control of Generation of Code ('Code Injection')
Scanner Integrations
| Scanner | Reference | Detected |
|---|---|---|
| Nessus | https://www.tenable.com/plugins/nessus/193897 | Jun 02, 2025 |
Recent Mentions
Tenable Blog · Apr 23, 2025
The 2025 Verizon Data Breach Investigations Report (DBIR) reveals that vulnerability exploitation was present in 20% of breaches — a 34% increase year-over-year. To support the report, Tenable Research contributed enriched data on the most exploited vulnerabilities. In this blog, we analyze 17 edge-related CVEs and remediation trends across industry sectors.BackgroundSince 2008, Verizon’s annual Data Breach Investigations Report (DBIR) has helped organizations understand evolving cyber threats. For the 2025 edition, Tenable Research contributed enriched data on the most exploited vulnerabilities of the past year. We analyzed over 160 million data points and zeroed-in on the 17 edge device CVEs featured in the DBIR to understand their average remediation times. In this blog, we take a closer look at these vulnerabilities, revealing industry-specific trends and highlighting where patching still lags — often by months.In this year’s DBIR, vulnerabilities in Virtual Private Networks (VPNs) and edge devices were particular areas of concern, accounting for 22% of the CVE-related breaches in this year’s report, almost eight times the amount of 3% found in the 2024 report.AnalysisThe 2025 DBIR found that exploitation of vulnerabilities surged to be one of the top initial access vectors for 20% of data breaches. This represents a 34% increase over last year’s report and is driven in part by the zero-day exploitation of VPN and edge device vulnerabilities – asset classes that traditional endpoint detection and response (EDR) vendors struggle to assess effectively. The DBIR calls special attention to 17 CVEs affecting these edge devices, which remain valuable targets for attackers. Tenable Research analyzed these 17 CVEs and evaluated which industries had the best and worst remediation rates across the vulnerabilities. As a primer, the table below provides this list of CVEs and details for each, including their Common Vulnerability Scoring System (CVSS) and Tenable…
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
09:26 UTC about 1 year ago09:26 UTC · about 1 year ago
Nessus plugin available
Scanner coverage available
-
18:16 UTC about 2 years ago18:16 UTC · about 2 years ago
CVE published
Vulnerability disclosed publicly
-
00:00 UTC about 2 years ago00:00 UTC · about 2 years ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
15:08 UTC over 2 years ago15:08 UTC · over 2 years ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2024-20359
{
"cve_id": "CVE-2024-20359",
"title": "A vulnerability in a legacy capability that allowed for the preloading of VPN...",
"affected_vendor": "Cisco",
"affected_product": "Cisco Adaptive Security Appliance (ASA) Software, Cisco Firepower Threat Defense Software",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 6.0,
"epss_score": null,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}