Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-48686

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 Community Edition 1.2.9及之前版本存在安全漏洞，该漏洞源于BGP NLRI解码器中未验证前缀位长度，可能导致栈缓冲区溢出。

AI Predicted 9.8 Difficulty: Moderate EPSS 0.56% · P44

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
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-48686

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
FastNetMon Community Edition through 1.2.9 contains a stack-based buffer overflow in the BGP NLRI (Network Layer Reachability Information) decoder. The function decode_bgp_subnet_encoding_ipv4_raw() in src/bgp_protocol.cpp reads prefix_bit_length directly from the BGP packet (line 99) without validating it is <= 32 for IPv4 prefixes. This value is passed to how_much_bytes_we_need_for_storing_certain_subnet_mask() which computes ceil(prefix_bit_length / 8), returning up to 32 bytes for a prefix_bit_length of 255. The result is used as the length argument to memcpy() (line 106), which copies into a 4-byte uint32_t stack variable (prefix_ipv4). This causes a stack buffer overflow of up to 28 bytes, which can be exploited for arbitrary code execution. Additionally, the unvalidated prefix_bit_length is passed to convert_cidr_to_binary_netmask_local_function_copy() (line 111), where a shift of (32 - cidr) with cidr > 32 causes undefined behavior.
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 Community Edition 1.2.9及之前版本存在安全漏洞，该漏洞源于BGP NLRI解码器中未验证前缀位长度，可能导致栈缓冲区溢出。
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-2026-48686

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-48686

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-48686 (1)

Security Blog Posts for CVE-2026-48686 (1)

Other References for CVE-2026-48686 (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 &rarr; →

IV. Related Vulnerabilities

Same product: n/a
Same vendor: n/a

V. Comments for CVE-2026-48686

No comments yet

Leave a comment