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ExploitedIn CISA KEVFix available

CVE-2018-0296

Exploitation confirmed. First attested on 2021-11-03 by CISA-ADP, CISA KEV, GCVE · kevintel, GCVE · shadowserver.

  • Published2018-06-07
  • Fixed in9.9.2.1 · 9.8.2.28 · 9.7.1.24 · 9.6.4.8 · 9.4.4.18 · 9.2.4.33
  • WeaknessCWE-20 · CWE-22

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A vulnerability in the web interface of the Cisco Adaptive Security Appliance (ASA) could allow an unauthenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition. It is also possible on certain software releases that the ASA will not reload, but an attacker could view sensitive system information without authentication by using directory traversal techniques. The vulnerability is due to lack of proper input validation of the HTTP URL. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected device. An exploit could allow the attacker to cause a DoS condition or unauthenticated disclosure of information. This vulnerability applies to IPv4 and IPv6 HTTP traffic. This vulnerability affects Cisco ASA Software and Cisco Firepower Threat Defense (FTD) Software that is running on the following Cisco products: 3000 Series Industrial Security Appliance (ISA), ASA 1000V Cloud Firewall, 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, Adaptive Security Virtual Appliance (ASAv), Firepower 2100 Series Security Appliance, Firepower 4100 Series Security Appliance, Firepower 9300 ASA Security Module, FTD Virtual (FTDv). Cisco Bug IDs: CSCvi16029.

Timeline

dates in UTC
  1. 2018-06-0712:29CVE publishedNVD
  2. 2018-06-28Exploit-DB entryExploit-DB
  3. 2021-11-03Added to the CISA KEV catalogCISA KEV
  4. 2021-11-03Listed as exploited by GCVEGCVE
  5. 2021-11-03Exploitation first reportedCISA KEV
  6. 2024-11-0817:21SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2018-0296?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-0296?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Cisco ASA
BranchAffectedFixed in
9.9≥ 9.9, < 9.9.2.19.9.2.1
9.8≥ 9.8, < 9.8.2.289.8.2.28
9.7≥ 9.7, < 9.7.1.249.7.1.24
9.x≥ 9.5, < 9.6.4.89.6.4.8
9.x≥ 9.3, < 9.4.4.189.4.4.18
9.2≥ 9.2, < 9.2.4.339.2.4.33
9.1≥ 9.1, < 9.1.7.299.1.7.29
Cisco secure firewall threat defense
BranchAffectedFixed in
6.2≥ 6.2.1, < 6.2.2.36.2.2.3
6.x≥ 6.0, < 6.1.06.1.0
6.2= 6.2.3no fix published
6.2= 6.2.3.1no fix published
Cisco firepower threat defense
BranchAffectedFixed in
6.2= 6.2.3-85.02no fix published
6.2= 6.2.3-851no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As cisco, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Cisco Adaptive Security Appliance unknown
    Affected
    • = Cisco Adaptive Security Appliance unknownno fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2019-08-12

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • ICSA-18-184-01 CISA4 known affected

    Rockwell Automation Allen-Bradley Stratix 5950

    Allen-Bradley Stratix 5950: 1783-SAD4T0SBK9 · Allen-Bradley Stratix 5950: 1783-SAD2T2SPK9 · Allen-Bradley Stratix 5950: 1783-SAD4T0SPK9 · +1 more

Full record on NVD

Fix

  1. Update Cisco ASA to 9.9.2.1 · 9.8.2.28 · 9.7.1.24 · 9.6.4.8 · 9.4.4.18 · 9.2.4.33 · 9.1.7.29
  2. CISA’s required action: Apply updates per vendor instructions.due 2022-05-03
  3. Mitigation from the vendor CISA ICSA-18-184-01 · 4 productsCVE-2018-0296 — Cisco has released Snort Rule 46897
  4. Mitigation from the vendor CISA ICSA-18-184-01 · 4 productsFor additional information please see the Rockwell Automation security notification at (login required): https://rockwellautomation.custhelp.com/app/answers/detail/a_id/1073860

Advisories and patches

Detection

read 2026-11-02 22:42 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
EDB-44956EDB-47220
Exploit-DB
Proof-of-concept repositories
4 repositories, unverifiedmilo2012/CVE-2018-0296yassineaboukir/CVE-2018-0296bhenner1/CVE-2018-0296qiantu88/CVE-2018-0296
PoC-in-GitHub
Metasploit modules
1 moduleauxiliary/scanner/http/cisco_directory_traversalrank: normalModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2021-11-03
Patch Due Date
2022-05-03
Ransomware Use
Unknown
Required Action
Apply updates per vendor instructions.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2018-06-07
Last Modified
2026-08-11
NVD status
Analyzed
GitHub Advisory
GHSA-h2mj-pqgp-xmmj

Frequently asked questions

What is CVE-2018-0296?

A vulnerability in the web interface of the Cisco Adaptive Security Appliance (ASA) could allow an unauthenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition. It is also possible on certain software releases that the ASA will not reload, but an attacker could view sensitive system information without authentication by using directory traversal techniques. The vulnerability is due to lack of proper input validation of the HTTP URL. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected device. An exploit could allow the attacker to cause a DoS condition or unauthenticated disclosure of information. This vulnerability applies to IPv4 and IPv6 HTTP traffic. This vulnerability affects Cisco ASA Software and Cisco Firepower Threat Defense (FTD) Software that is running on the following Cisco products: 3000 Series Industrial Security Appliance (ISA), ASA 1000V Cloud Firewall, 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, Adaptive Security Virtual Appliance (ASAv), Firepower 2100 Series Security Appliance, Firepower 4100 Series Security Appliance, Firepower 9300 ASA Security Module, FTD Virtual (FTDv). Cisco Bug IDs: CSCvi16029.

Is CVE-2018-0296 actively exploited?

Yes. CVE-2018-0296 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2022-05-03.

What is the CVSS score for CVE-2018-0296?

CVE-2018-0296 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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