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CVE-2026-59250: Megaco flex scanner buffer overflow via oversized property parm name

CVE-2026-59250 is a vulnerability in Megaco flex scanner buffer overflow via oversized property parm name, rated Important by Microsoft. Microsoft has not reported exploitation in the wild. The EPSS model estimates a 0.78% probability of exploitation activity in the next 30 days, higher than 56% of all scored vulnerabilities. Microsoft released the fix on 14 August 2026, outside Patch Tuesday. It affects 1 product in 1 product family (Open Source Software).

Key facts

CVE ID
CVE-2026-59250
Severity
N/A
Microsoft severity
Important
Exploited in the wild
No
Publicly disclosed
No
Weakness
CWE-120; CWE-787
EPSS
0.78% (percentile 56%)
CISA KEV
Not listed
Released
Last updated
Patch Tuesday
July 2026 Patch Tuesday
Product families
Open Source Software

Affected products (1)

Open Source Software

ProductSecurity updateTypeFixed buildRestart
azl3 erlang 26.2.5.21-4 on Azure Linux 3.0CBL-Mariner ReleasesSecurity Update26.2.5.21-5No

NIST NVD data

NVD status
Awaiting Analysis
NVD CVSS
8.3 (HIGH)
NVD weakness
CWE-120; CWE-787
Published to NVD
NVD last modified

References

Revision history

VersionDateDescription
1.0Information published.
2.0Information published.

Sources