CVE-2026-34790 | Endian Firewall 3.3.25 Parameter /cgi-bin/backup.cgi unlink Archive path traversal

VDB-354893 · CVE-2026-34790 · GCVE-0-2026-34790 ENDIAN FIREWALL 3.3.25 PARAMETER /CGI-BIN/BACKUP.CGI UNLINK ARCHIVE PATH TRAVERSAL HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.2 $0-$5k 0.08+ Summaryinfo A vulnerability was found in Endian Firewall 3.3.25. It has been rated as critical. Affected by this vulnerability is the function unlink of the file /cgi-bin/backup.cgi of the component Parameter Handler. The manipulation of the argument Archive leads to path traversal. This vulnerability is listed as CVE-2026-34790. The attack may be initiated remotely. There is no available exploit. Detailsinfo A vulnerability was found in Endian Firewall 3.3.25 and classified as critical. This issue affects the function unlink of the file /cgi-bin/backup.cgi of the component Parameter Handler. The manipulation of the argument ARCHIVE with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is integrity, and availability. The summary by CVE is: Endian Firewall version 3.3.25 and prior allow authenticated users to delete arbitrary files via directory traversal in the remove ARCHIVE parameter to /cgi-bin/backup.cgi. The remove ARCHIVE parameter value is used to construct a file path without sanitization of directory traversal sequences, which is then passed to an unlink() call. The weakness was presented by Alex Williams. The advisory is shared at help.endian.com. The identification of this vulnerability is CVE-2026-34790 since 03/30/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/02/2026). MITRE ATT&CK project uses the attack technique T1006 for this issue. There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Productinfo Type Firewall Software Vendor Endian Name Firewall Version 3.3.25 CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA CVSS-B Score: 🔒 CNA CVSS-BT Score: 🔒 CNA Vector: 🔒 CVSSv3info VulDB Meta Base Score: 6.2 VulDB Meta Temp Score: 6.2 VulDB Base Score: 5.4 VulDB Temp Score: 5.4 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 7.1 CNA Vector (VulnCheck): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Path traversal CWE: CWE-22 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 03/30/2026 CVE reserved 04/02/2026 +3 days Advisory disclosed 04/02/2026 +0 days VulDB entry created 04/02/2026 +0 days VulDB entry last update Sourcesinfo Advisory: help.endian.com Researcher: Alex Williams Status: Confirmed CVE: CVE-2026-34790 (🔒) GCVE (CVE): GCVE-0-2026-34790 GCVE (VulDB): GCVE-100-354893 Entryinfo Created: 04/02/2026 17:26 Changes: 04/02/2026 17:26 (79) Complete: 🔍 Cache ID: 99:BCA:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸