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CVE-2026-86098— ntop nDPI before 6.0 Heap Buffer Overflow via ndpi_json_string_escape

Quick assessment

Affected
ntop nDPI
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.

ntop nDPI是ntop组织开源的一款用于深度数据包检查的开源库。 ntop nDPI 6.0之前版本存在缓冲区错误漏洞，该漏洞源于ndpi_json_string_escape函数向超出调用方提供的缓冲区边界写入数据，攻击者可利用包含TLS SNI、HTTP头或DNS名称的特制网络数据包触发堆缓冲区溢出，导致堆破坏。

CVSS 7.4 · High EPSS 0.59% · P48

Affected Version Matrix 2

VendorProduct Version RangeStatus
ntop nDPI < 6.0 affected
6.0 unaffected
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I. Basic Information for CVE-2026-86098

Vulnerability Information
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Vulnerability Title
ntop nDPI before 6.0 Heap Buffer Overflow via ndpi_json_string_escape
Source: CVE Program / CVE List V5
Vulnerability Description
ntop nDPI versions before 6.0 contain a heap buffer overflow vulnerability in the ndpi_json_string_escape function that writes beyond caller-supplied buffer boundaries. Attackers can trigger the overflow by supplying crafted network packet data including TLS SNI, HTTP headers, or DNS names that reach the vulnerable function, causing heap corruption.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
ntop nDPI 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ntop nDPI是ntop组织开源的一款用于深度数据包检查的开源库。 ntop nDPI 6.0之前版本存在缓冲区错误漏洞，该漏洞源于ndpi_json_string_escape函数向超出调用方提供的缓冲区边界写入数据，攻击者可利用包含TLS SNI、HTTP头或DNS名称的特制网络数据包触发堆缓冲区溢出，导致堆破坏。
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
ntop nDPI 0 ~ 6.0 -

II. Public POCs for CVE-2026-86098

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III. Intelligence Information for CVE-2026-86098

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Patches & Fixes for CVE-2026-86098 (1)

Vendor Advisories for CVE-2026-86098 (1)

Same Patch Batch · ntop · 2026-09-04 · 3 CVEs total

CVE-2026-86091 7.1 HIGH ntopng before 6.7.260717 Missing Authorization on the Host Pool Bulk Delete Handler
CVE-2026-86090 7.1 HIGH ntopng before 6.7.260717 Missing Authorization on the Notification Endpoint and Recipient

IV. Related Vulnerabilities

Same product: nDPI
Same vendor: ntop
Same weakness: CWE-787