CVE-2026-48685: n/a
FastNetMon Community Edition versions through 1. 2. 9 contain a vulnerability due to incorrect parsing of BGP path attributes with the extended length flag set. The software reads only one byte for the attribute length when two bytes are required, causing length truncation for attributes longer than 255 bytes. This leads to misinterpretation of subsequent attributes and potential out-of-bounds memory access.
AI Analysis
Technical Summary
The vulnerability in FastNetMon Community Edition up to version 1.2.9 arises from improper handling of BGP path attributes that use the extended length flag. According to RFC 4271 Section 4.3, when the extended length bit is set, the attribute length field should be read as a 16-bit big-endian integer. However, the parse_raw_bgp_attribute() function reads only a single byte, truncating the length and causing the parser to misinterpret the remaining attribute bytes. This results in cascading parsing errors and potential out-of-bounds memory access, which could lead to instability or crashes.
Potential Impact
The incorrect parsing can cause out-of-bounds memory access, which may lead to application crashes or undefined behavior in FastNetMon Community Edition. There is no information about known exploits in the wild or direct impact such as code execution from the provided data.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround information is provided at this time.
CVE-2026-48685: n/a
Description
FastNetMon Community Edition versions through 1. 2. 9 contain a vulnerability due to incorrect parsing of BGP path attributes with the extended length flag set. The software reads only one byte for the attribute length when two bytes are required, causing length truncation for attributes longer than 255 bytes. This leads to misinterpretation of subsequent attributes and potential out-of-bounds memory access.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in FastNetMon Community Edition up to version 1.2.9 arises from improper handling of BGP path attributes that use the extended length flag. According to RFC 4271 Section 4.3, when the extended length bit is set, the attribute length field should be read as a 16-bit big-endian integer. However, the parse_raw_bgp_attribute() function reads only a single byte, truncating the length and causing the parser to misinterpret the remaining attribute bytes. This results in cascading parsing errors and potential out-of-bounds memory access, which could lead to instability or crashes.
Potential Impact
The incorrect parsing can cause out-of-bounds memory access, which may lead to application crashes or undefined behavior in FastNetMon Community Edition. There is no information about known exploits in the wild or direct impact such as code execution from the provided data.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround information is provided at this time.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-05-22T00:00:00.000Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a15c089891d628fdc570d32
Added to database: 5/26/2026, 3:47:21 PM
Last enriched: 5/26/2026, 4:02:52 PM
Last updated: 5/26/2026, 5:01:28 PM
Views: 4
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