A vulnerability in the Secure Sockets Layer (SSL) VPN functionality of the Cisco Adaptive Security Appliance (ASA) Software could allow an unauthenticated, remote attacker to cause a reload of the affected system or to remotely execute code. The vulnerability is due to an attempt to double free a region of memory when the webvpn feature is enabled on the Cisco ASA device. An attacker could exploit this vulnerability by sending multiple, crafted XML packets to a webvpn-configured interface on the affected system. An exploit could allow the attacker to execute arbitrary code and obtain full control of the system, or cause a reload of the affected device. This vulnerability affects Cisco ASA Software that is running on the following Cisco products: 3000 Series Industrial Security Appliance (ISA), ASA 5500 Series Adaptive Security Appliances, ASA 5500-X Series Next-Generation Firewalls, ASA Services Module for Cisco Catalyst 6500 Series Switches and Cisco 7600 Series Routers, ASA 1000V Cloud Firewall, Adaptive Security Virtual Appliance (ASAv), Firepower 2100 Series Security Appliance, Firepower 4110 Security Appliance, Firepower 9300 ASA Security Module, Firepower Threat Defense Software (FTD). Cisco Bug IDs: CSCvg35618.
CVE-2018-0101
“—” beside the score: it is equal to NVD's CVSS score.
Score 10.0 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-13. NVD baseline CVSS 10.0; sources differ by 0.0.
- High exploitation likelihood — EPSS 87%
- Public exploit or proof-of-concept code is available
No fix has been recorded since the CVE record was published in 2018 — use a compensating control (WAF / firewall / segmentation) and check the vendor's advisory.
- CVSS v3
- 10.0
- EG Score
- 10.0CRITICALmedium confidence
- EG Risk
- 95EG Risk 95/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity100% × 45%Impact severity (EG Severity): CVSS 10.0 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation87% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: No fix has been recorded since the CVE record was published in 2018. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and check the vendor's advisory for a fix. - EPSS PROB
- 87%
- EPSS %ILE
- 99th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (10.0): severity, escalated by confirmed exploitation. This CVE's 10.0 is its impact severity (EG Severity), not escalated.
- EG Severity
- 10.0 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 87% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-22). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).
No fix has been recorded since the CVE record was published in 2018. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and check the vendor's advisory for a fix.
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.
In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
January 29, 2018
Last Modified
August 11, 2026
Advisory Details (6)
Auto-updated Oct 21, 2026Thoughts on the handling CVE-2018-0101 / Cisco Bug CSCvg35618 – I CAN'T HACK IT …OR CAN I?
https://icanthackit.wordpress.com/2018/01/30/thoughts-on-the-handling-cve-2018-0101-cisco-bug-cscvg35618/Cisco Adaptive Security Appliance Remote Code Execution and Denial of Service Vulnerability
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180129-asa1Vendor Advisories for CVE-2018-0101(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 17× in last 7d / 36× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 15 repeat rows among the latest 94 are merged into the row they repeat.
- 2026-10-23 05:08 UTCEG score recompute
- 2026-10-23 05:08 UTCGHSA enrichmentGHSA-gxj8-6mjh-32m2 · GitHub severity CRITICAL · GitHub CVSS 10.0
- 2026-10-22 06:01 UTCEG score recompute
- 2026-10-22 06:01 UTCGHSA enrichmentGHSA-gxj8-6mjh-32m2 · GitHub severity CRITICAL · GitHub CVSS 10.0
- 2026-10-21 16:27 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-10-21 06:54 UTCEG score recompute
- 2026-10-21 06:54 UTCGHSA enrichmentGHSA-gxj8-6mjh-32m2 · GitHub severity CRITICAL · GitHub CVSS 10.0
- 2026-10-20 07:49 UTCEG score recompute
- 2026-10-20 07:49 UTCGHSA enrichmentGHSA-gxj8-6mjh-32m2 · GitHub severity CRITICAL · GitHub CVSS 10.0
- 2026-10-19 16:26 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-10-19 08:42 UTCEG score recompute
- 2026-10-19 08:41 UTCGHSA enrichmentGHSA-gxj8-6mjh-32m2 · GitHub severity CRITICAL · GitHub CVSS 10.0
- 2026-10-18 16:27 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-10-18 09:36 UTCEG score recompute
- 2026-10-18 09:36 UTCGHSA enrichmentGHSA-gxj8-6mjh-32m2 · GitHub severity CRITICAL · GitHub CVSS 10.0
- 2026-10-17 10:30 UTCEG score recompute
- 2026-10-17 10:29 UTCGHSA enrichmentGHSA-gxj8-6mjh-32m2 · GitHub severity CRITICAL · GitHub CVSS 10.0
- 2026-10-16 16:29 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-10-16 11:22 UTCEG score recompute
- 2026-10-16 11:22 UTCGHSA enrichmentGHSA-gxj8-6mjh-32m2 · GitHub severity CRITICAL · GitHub CVSS 10.0
- 2026-10-15 11:53 UTCEG score recompute
- 2026-10-15 11:52 UTCGHSA enrichmentGHSA-gxj8-6mjh-32m2 · GitHub severity CRITICAL · GitHub CVSS 10.0
- 2026-10-14 16:27 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-10-14 07:22 UTCEG score recompute
- 2026-10-14 07:22 UTCGHSA enrichmentGHSA-gxj8-6mjh-32m2 · GitHub severity CRITICAL · GitHub CVSS 10.0
Show 54 moreShow fewer
- 2026-10-13 16:27 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-10-13 02:37 UTCGHSA enrichmentGHSA-gxj8-6mjh-32m2 · GitHub severity CRITICAL · GitHub CVSS 10.0
- 2026-10-12 20:23 UTCEG score recompute
- 2026-10-12 16:28 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-10-12 00:46 UTCEG score recompute
- 2026-10-10 19:55 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-10-06 15:12 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-09-30 09:49 UTCEG score recompute
- 2026-09-26 15:53 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-09-26 00:19 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-09-24 13:59 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-09-21 20:27 UTCEPSS rescoreEPSS 73% · 99th percentile
- 2026-09-17 19:22 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-09-12 14:56 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-09-05 15:24 UTCEPSS rescoreEPSS 73% · 99th percentile
- 2026-09-04 13:56 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-09-02 14:07 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-08-30 19:13 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-08-28 21:36 UTCEPSS rescoreEPSS 73% · 99th percentile
- 2026-08-27 14:21 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-08-26 14:41 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-08-19 16:59 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-08-16 02:10 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-08-11 20:00 UTCEG score recompute
- 2026-08-11 20:00 UTCGHSA enrichmentGHSA-gxj8-6mjh-32m2 · GitHub severity CRITICAL · GitHub CVSS 10.0
- 2026-07-30 16:24 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-07-23 01:31 UTCEG score recompute
- 2026-07-22 22:11 UTCEG score recompute
- 2026-07-22 14:04 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-07-20 17:04 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-07-15 16:54 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-07-13 22:26 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-07-12 05:43 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-07-11 08:24 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-07-04 06:28 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-07-01 15:03 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-06-27 03:06 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-06-24 14:02 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-06-23 21:30 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-06-17 17:50 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-06-15 17:45 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-06-13 22:57 UTCEPSS rescoreEPSS 93% · 99th percentile
- 2026-06-12 23:09 UTCEPSS rescoreEPSS 93% · 99th percentile
- 2026-06-11 13:57 UTCEPSS rescoreEPSS 93% · 99th percentile
- 2026-06-10 22:15 UTCEPSS rescoreEPSS 93% · 99th percentile
- 2026-06-08 14:14 UTCEPSS rescoreEPSS 93% · 99th percentile
- 2026-06-05 22:44 UTCEPSS rescoreEPSS 93% · 99th percentile
- 2026-05-31 00:14 UTCEPSS rescoreEPSS 93% · 99th percentile
- 2026-05-29 13:41 UTCEPSS rescoreEPSS 93% · 99th percentile
- 2026-05-28 13:42 UTCEPSS rescoreEPSS 93% · 99th percentile
- 2026-05-28 12:03 UTCEG score recompute
- 2026-05-28 12:03 UTCGHSA enrichmentGHSA-gxj8-6mjh-32m2 · GitHub severity CRITICAL · GitHub CVSS 10.0
- 2026-05-27 13:38 UTCEPSS rescoreEPSS 93% · 99th percentile
- 2026-05-23 02:35 UTCOSV refresh
Publicly available exploits
(3 references)Public exploit code is referenced for this CVE (1 Exploit-DB entry, 2 GitHub PoCs). No fix has been recorded since the CVE record was published in 2018. If the vendor still supports the product, apply the fixed version it names; if it no longer does, isolate the affected system.
- GitHub PoCCymmetria/ciscoasa_honeypotPublished Feb 8, 2018
A low interaction honeypot for the Cisco ASA component capable of detecting CVE-2018-0101, a DoS and remote code execution vulnerability.
Open source ↗ - Exploit-DBEDB-43986Published Feb 7, 2018
Cisco ASA - Crash (PoC)
Open source ↗ - Open source ↗GitHub PoC1337g/CVE-2018-0101-DOS-POCPublished Feb 7, 2018
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2018-0101?
When was CVE-2018-0101 made public?
Is CVE-2018-0101 actively exploited?
What is the CVSS score of CVE-2018-0101?
How do I remediate CVE-2018-0101?
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2018-0101
Is Your Infrastructure Affected by CVE-2018-0101?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.