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CVE-2026-48691

Quick assessment

Affected
n/a n/a
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FastNetMon是Pavel Odintsov个人开发者的一个基于多个数据包捕获引擎构建的高性能 DDoS 检测器/传感器。 FastNetMon 1.2.9及之前版本存在安全漏洞，该漏洞源于BGP AS_PATH属性编码器中长度字段类型为uint8_t导致截断，可能导致堆缓冲区溢出。

AI Predicted 8.1 Difficulty: Moderate EPSS 0.31% · P23

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
n/a n/a n/a affected
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I. Basic Information for CVE-2026-48691

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
FastNetMon Community Edition through 1.2.9 contains an integer overflow in the BGP AS_PATH attribute encoder. In src/bgp_protocol.hpp, the IPv4UnicastAnnounce::get_attributes() function computes attribute_length as 'sizeof(bgp_as_path_segment_element_t) + this->as_path_asns.size() * sizeof(uint32_t)' and stores it in a uint8_t field (line 600-605). Since uint8_t can only hold values 0-255, an AS_PATH containing more than 63 ASNs (2 + 64*4 = 258 > 255) causes silent truncation. The truncated length is used for buffer sizing, while the actual data written is the full untruncated amount, resulting in a heap buffer overflow. Similarly, the path_segment_length field at line 621 is also uint8_t, truncating with more than 255 ASNs.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
FastNetMon 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FastNetMon是Pavel Odintsov个人开发者的一个基于多个数据包捕获引擎构建的高性能 DDoS 检测器/传感器。 FastNetMon 1.2.9及之前版本存在安全漏洞，该漏洞源于BGP AS_PATH属性编码器中长度字段类型为uint8_t导致截断，可能导致堆缓冲区溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- n/a n/a -

II. Public POCs for CVE-2026-48691

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III. Intelligence Information for CVE-2026-48691

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Security Blog Posts for CVE-2026-48691 (1)

Other References for CVE-2026-48691 (1)

Same Patch Batch · n/a · 2026-05-26 · 31 CVEs total

CVE-2026-9496 7.5 HIGH pacote 安全漏洞
CVE-2026-9580 7.3 HIGH JeecgBoot selectDepart LoginController.selectDepart access control
CVE-2026-9495 7.3 HIGH @koa/router 安全漏洞
CVE-2026-9581 6.3 MEDIUM JeecgBoot add access control
CVE-2026-9579 6.3 MEDIUM JeecgBoot SysUser userEdit user.getUsername access control
CVE-2026-9541 5.3 MEDIUM Squirrel Cnut File sqobject.cpp ReadObject heap-based overflow
CVE-2026-9568 5.0 MEDIUM ThingsBoard YAML provision getGatewayDockerComposeFile code injection
CVE-2026-9604 4.3 MEDIUM JeecgBoot AiragModelController access control
CVE-2026-9572 3.3 LOW GPAC MP4Box media.c Media_GetSample memory leak
CVE-2026-9567 3.3 LOW GPAC MP4Box isom_intern.c MergeFragment null pointer dereference
CVE-2025-68709 SailingLab AppLock 安全漏洞
CVE-2025-68711 AppLockZ - TrustedApp App Lock and Fingerprint Lock 安全漏洞
CVE-2025-68708 SailingLab AppLock 安全漏洞
CVE-2026-36239 PbootCMS 安全漏洞
CVE-2025-68710 Easyelife App Lock 安全漏洞
CVE-2026-48685 FastNetMon 安全漏洞
CVE-2026-48689 FastNetMon 缓冲区错误漏洞
CVE-2026-48694 FastNetMon 安全漏洞
CVE-2026-48695 FastNetMon 安全漏洞
CVE-2026-48696 FastNetMon 安全漏洞

Showing top 20 of 31 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

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Same vendor: n/a

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