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CVE-2026-90558— sngrep through 1.8.4 Stack Buffer Overflow via SIP Headers

Quick assessment

Affected
irontec sngrep
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.

Irontec Sngrep是Irontec公司开源的一个用于显示来自终端的SIP呼叫消息流的工具。 Irontec sngrep 1.8.4及之前版本存在缓冲区错误漏洞，该漏洞源于SIP属性格式化例程中栈缓冲区溢出，当标头值超过255字节缓冲区限制时，攻击者可构造带有超大Call-ID、X-Call-ID或其他标头字段的恶意SIP数据包，导致崩溃或执行任意代码。

CVSS 9.8 · Critical EPSS 0.88% · P59

Possible ATT&CK Techniques 2 AI

T1204.006 T1204.001 · Malicious Link

Affected Version Matrix 1

VendorProduct Version RangeStatus
irontec sngrep ≤ 1.8.4 affected
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I. Basic Information for CVE-2026-90558

Vulnerability Information
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Vulnerability Title
sngrep through 1.8.4 Stack Buffer Overflow via SIP Headers
Source: CVE Program / CVE List V5
Vulnerability Description
sngrep through 1.8.4 contains stack buffer overflow vulnerabilities in SIP attribute formatting routines when header values exceed the 255-byte buffer limit. Attackers can craft malicious SIP packets with oversized Call-ID, X-Call-ID, or other header fields to overflow stack buffers and cause crashes or execute arbitrary code during packet parsing and rendering.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Irontec sngrep 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Irontec Sngrep是Irontec公司开源的一个用于显示来自终端的SIP呼叫消息流的工具。 Irontec sngrep 1.8.4及之前版本存在缓冲区错误漏洞，该漏洞源于SIP属性格式化例程中栈缓冲区溢出，当标头值超过255字节缓冲区限制时，攻击者可构造带有超大Call-ID、X-Call-ID或其他标头字段的恶意SIP数据包，导致崩溃或执行任意代码。
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
irontec sngrep 0 ~ 1.8.4 -

II. Public POCs for CVE-2026-90558

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III. Intelligence Information for CVE-2026-90558

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Patches & Fixes for CVE-2026-90558 (1)

Vendor Advisories for CVE-2026-90558 (1)

Proof of Concept for CVE-2026-90558 (1)

Other References for CVE-2026-90558 (2)

IV. Related Vulnerabilities

Same product: sngrep
Same vendor: irontec
Same weakness: CWE-121