September 20, 2026

CVE Watchtower

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CVE-2026-90779NVD

Description

SIPp through 3.7.7 contains a stack buffer overflow vulnerability in createAuthHeader() when processing SIP authentication challenges with oversized algorithm parameters. A malicious SIP server can send a crafted 401 or 407 challenge to corrupt the stack and crash the client process.
Severity Level
HIGH (7.5)
Published Date
13/09/2026
Last Modified
14/09/2026
Exploitation Status
????
EPSS Score
0.57% (percentile 45.7%)

CVSS Base Metrics

CVSS v3 (3.1)
HIGH 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4 (4.0)
HIGH 8.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Weaknesses (CWE)

CWE-121 - Stack-based Buffer Overflow

Affected & Patched Versions

ProductAffected VersionsPatched Version
SIPp sipp0 - <= 3.7.7N/A
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📧Email Delivery — Threat intel straight to your inbox.
♾️Unlimited Vendors — Track your entire stack.
🚨All New CVEs — Be the first to know.
⚙️Custom EPSS — Filter noise, focus on risk.
💬Webhooks — Slack & Teams integration.
🚫Ad-Free — Uninterrupted experience.

References