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CVE-2026-34790

high

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.

7.1
cvss high
common vulnerability scoring system v3.1. measures intrinsic severity on a 0-10 scale.
epss 0.0034
exploitation prediction scoring system. probability this vulnerability will be exploited in the wild in the next 30 days.
kev no
cisa known exploited vulnerabilities catalog. confirmed active exploitation.
CVSS 4.0 Common Vulnerability Scoring System v4.0
7.1 / 10
HIGH
exploitability
Attack Vector
Network
Attack Vector (AV:N): exploitable remotely over the network — most dangerous. no physical or adjacent access needed.
Attack Complexity
Low
Attack Complexity (AC:L): no special conditions needed. attack can be reliably reproduced.
Attack Requirements
None
Attack Requirements (AT:N): no special deployment or execution conditions needed.
Privileges Required
Low
Privileges Required (PR:L): requires basic user-level access.
User Interaction
None
User Interaction (UI:N): no victim action needed. fully exploitable without user interaction.
vulnerable system impact
Vuln Confidentiality
None
Confidentiality (VC:N): no confidentiality impact.
Vuln Integrity
High
Integrity (VI:H): complete data modification possible. attacker can modify any data.
Vuln Availability
Low
Availability (VA:L): reduced performance or partial service interruption.
subsequent system impact
Sub Confidentiality
None
Subsequent Confidentiality: impact on data confidentiality of downstream/connected systems. Value: N (None)
Sub Integrity
None
Subsequent Integrity: impact on data integrity of downstream/connected systems. Value: N (None)
Sub Availability
None
Subsequent Availability: impact on service availability of downstream/connected systems. Value: N (None)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
CVSS 3.1 Common Vulnerability Scoring System v3.1
7.1 / 10
HIGH
exploitability
Attack Vector
Network
Attack Vector (AV:N): exploitable remotely over the network — most dangerous. no physical or adjacent access needed.
Attack Complexity
Low
Attack Complexity (AC:L): no special conditions needed. attack can be reliably reproduced.
Privileges Required
Low
Privileges Required (PR:L): requires basic user-level access.
User Interaction
None
User Interaction (UI:N): no victim action needed. fully exploitable without user interaction.
impact
Scope
Unchanged
Scope (S:U): impact limited to the vulnerable component.
Confidentiality
None
Confidentiality (C:N): no confidentiality impact.
Integrity
High
Integrity (I:H): complete data modification possible. attacker can modify any data.
Availability
Low
Availability (A:L): reduced performance or partial service interruption.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
exploit detect attrib advisory media timeline
exploitation detection attribution advisories media timeline
activity density
rdintel assessment
31 threat composite score from 15+ signals including exploitation status, epss probability, detection coverage, and community attention. 0-100 scale.

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