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CVE-2026-34808

medium

Endian Firewall version 3.3.25 and prior allow stored cross-site scripting (XSS) via the remark parameter to /cgi-bin/outgoingfw.cgi. An authenticated attacker can inject arbitrary JavaScript that is stored and executed when other users view the affected page.

6.4
cvss medium
common vulnerability scoring system v3.1. measures intrinsic severity on a 0-10 scale.
epss 0.0003
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
5.1 / 10
MEDIUM
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
Passive
User Interaction (UI:P): victim must perform a limited, passive action (e.g. opening a document).
vulnerable system impact
Vuln Confidentiality
None
Confidentiality (VC:N): no confidentiality impact.
Vuln Integrity
None
Integrity (VI:N): no integrity impact.
Vuln Availability
None
Availability (VA:N): no availability impact.
subsequent system impact
Sub Confidentiality
Low
Subsequent Confidentiality: impact on data confidentiality of downstream/connected systems. Value: L (Low)
Sub Integrity
Low
Subsequent Integrity: impact on data integrity of downstream/connected systems. Value: L (Low)
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:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
CVSS 3.1 Common Vulnerability Scoring System v3.1
6.4 / 10
MEDIUM
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
Changed
Scope (S:C): exploitation impacts resources beyond the vulnerable component.
Confidentiality
Low
Confidentiality (C:L): limited data exposure. some restricted information can be read.
Integrity
Low
Integrity (I:L): limited data modification. some data can be altered.
Availability
None
Availability (A:N): no availability impact.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
exploit detect attrib advisory media timeline
exploitation detection attribution advisories media timeline
activity density
rdintel assessment
27 threat composite score from 15+ signals including exploitation status, epss probability, detection coverage, and community attention. 0-100 scale.

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