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Vulnerability record · CVE-2017-8840 · published 5 June 2017

CVE-2017-8840: Peplink b305hw2 firmware information exposure vulnerability

Peplink · B305hw2 Firmware

Debug information disclosure exists on Peplink Balance 305, 380, 580, 710, 1350, and 2500 devices with firmware before fw-b305hw2_380hw6_580hw2_710hw3_1350hw2_2500-7.0.1-build2093. A direct request to cgi-bin/HASync/hasync.cgi?debug=1 shows Master LAN Address, Serial Number, HA Group ID, Virtual IP, and Submitted syncid.

5.3 CVSS 3.0 Medium EPSS 3.6% · top 11.1% CWE-200 · Information exposure
5.3CVSS 3.0 base score, v2 5.0
3.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
6Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

Debug information disclosure exists on Peplink Balance 305, 380, 580, 710, 1350, and 2500 devices with firmware before fw-b305hw2_380hw6_580hw2_710hw3_1350hw2_2500-7.0.1-build2093. A direct request to cgi-bin/HASync/hasync.cgi?debug=1 shows Master LAN Address, Serial Number, HA Group ID, Virtual IP, and Submitted syncid.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected products

6 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://seclists.org/bugtraq/2017/Jun/1 Mailing ListThird Party Advisory
https://www.exploit-db.com/exploits/42130/
https://www.x41-dsec.de/lab/advisories/x41-2017-005-peplink/ PatchThird Party Advisory
http://seclists.org/bugtraq/2017/Jun/1 Mailing ListThird Party Advisory
https://www.exploit-db.com/exploits/42130/
https://www.x41-dsec.de/lab/advisories/x41-2017-005-peplink/ PatchThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2017-8835Peplink Balance routers SQL injection via bauth cookiePeplink Balance 305, 380, 580, 710, 1350 and 2500 devices running firmware before 7.0.1-build2093 contain a SQL injection in cgi-bin/MANGA/admin.cgi …EPSS 62%analysed9.8CVE-2017-8837Peplink b305hw2 firmware insufficiently protected credentials vulnerabilityCleartext password storage exists on Peplink Balance 305, 380, 580, 710, 1350, and 2500 devices with firmware before fw-b305hw2_380hw6_580hw2_710hw3_…EPSS 4.9%8.8CVE-2017-8836Peplink b305hw2 firmware cross-site request forgery vulnerabilityCSRF exists on Peplink Balance 305, 380, 580, 710, 1350, and 2500 devices with firmware before fw-b305hw2_380hw6_580hw2_710hw3_1350hw2_2500-7.0.1-bui…EPSS 1.9%8.1CVE-2017-8841Peplink b305hw2 firmware path traversal vulnerabilityArbitrary file deletion exists on Peplink Balance 305, 380, 580, 710, 1350, and 2500 devices with firmware before fw-b305hw2_380hw6_580hw2_710hw3_135…EPSS 3.7%6.1CVE-2017-8838Peplink b305hw2 firmware cross-site scripting vulnerabilityXSS via syncid exists on Peplink Balance 305, 380, 580, 710, 1350, and 2500 devices with firmware before fw-b305hw2_380hw6_580hw2_710hw3_1350hw2_2500…EPSS 1.8%6.1CVE-2017-8839Peplink b305hw2 firmware cross-site scripting vulnerabilityXSS via orig_url exists on Peplink Balance 305, 380, 580, 710, 1350, and 2500 devices with firmware before fw-b305hw2_380hw6_580hw2_710hw3_1350hw2_25…EPSS 1.8%5.9CVE-2025-68686FortiOS symbolic link patch bypass exposes sensitive informationFortiOS contains an information exposure flaw (CWE-200) that lets a remote unauthenticated attacker bypass the patch for the symbolic link persistenc…KEVEPSS 30%analysed7.5CVE-2026-20133Cisco Catalyst SD-WAN Manager insufficient file system restrictions expose dataCisco Catalyst SD-WAN Software has insufficient file system restrictions that let an attacker read sensitive files on the underlying operating system…KEVEPSS 32%analysed

Source: NIST National Vulnerability Database (record CVE-2017-8840), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.