CVE-2025-34098
CVE-2025-34098 is a high-severity vulnerability with a CVSS 4.0 base score of 7.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.
Key facts
- Severity: High (CVSS 4.0 base score 7.1)
- EPSS exploit prediction: 1% (49th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-21035
- Weakness: CWE-200
- Published:
- Last modified:
Description
A path traversal vulnerability exists in Riverbed SteelHead VCX appliances (confirmed in VCX255U 9.6.0a) due to improper input validation in the log filtering functionality exposed via the management web interface. An authenticated attacker can exploit this flaw by submitting crafted filter expressions to the log_filter endpoint using the filterStr parameter. This input is processed by a backend parser that permits execution of file expansion syntax, allowing the attacker to retrieve arbitrary system files via the log viewing interface.
Frequently asked questions
- What is CVE-2025-34098?
- A path traversal vulnerability exists in Riverbed SteelHead VCX appliances (confirmed in VCX255U 9.6.0a) due to improper input validation in the log filtering functionality exposed via the management web interface. An authenticated attacker can exploit this flaw by submitting crafted filter expressions to the log_filter endpoint using the filterStr parameter. This input is processed by a backend parser that permits execution of file expansion syntax, allowing the attacker to retrieve arbitrary system files via the log viewing interface.
- How severe is CVE-2025-34098?
- CVE-2025-34098 has a CVSS 4.0 base score of 7.1, rated high severity.
- Is CVE-2025-34098 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2025-34098?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2025-34098 have an EU (EUVD) identifier?
- Yes. CVE-2025-34098 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-21035.
- When was CVE-2025-34098 published?
- CVE-2025-34098 was published on 2025-07-10 and last updated on 2026-06-17.
References
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/auxiliary/scanner/http/riverbed_steelhead_vcx_file_read.rb
- https://vulncheck.com/advisories/riverbed-steel-head-vcx-authenticated-arbitrary-file-read
- https://www.exploit-db.com/exploits/42101
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