CVE-2026-20462: In Telephony, there is a possible memory corruption due to a heap buffer overflow. This could lead to local escalation of privilege if a malicious actor has already obtained the Sy

mediumCVSS 6.7CVE-2026-20462

In Telephony, there is a possible memory corruption due to a heap buffer overflow. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11006447; Issue ID: MSV-7871.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: medium — CVSS 6.7
Published: 2026-07-01
Last updated: 2026-07-02
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-20462

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-204620.11% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-20462	coverage & exploitation status	NVD · CVE.org

Recent advisories for In Telephony

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

highCVE-2026-42912: Windows Telephony Service Elevation of Privilege Vulnerabilitymsrc · 2026-06-09
mediumCVE-2026-42968: Windows Telephony Server Information Disclosure Vulnerabilitymsrc · 2026-06-09

CVE-2026-20462: In Telephony, there is a possible memory corruption due to a heap buffer overflow. This could lead to local escalation of privilege if a malicious actor has already obtained the Sy

Details

Exploitation outlook

Referenced CVEs

Recent advisories for In Telephony

More from NVD Recent CVEs