HOMEVULNERABILITIESCVE-2026-20449
MEDIUM

CVE-2026-20449

CWE-120Published: May 4, 2026· Updated: May 7, 2026

6.5
CVSS v3.1
EPSS:0.04%probability of exploitation in 30 daysPercentile:13.7th

Official Description

In Modem, there is a possible system crash due to a heap buffer overflow. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01760138; Issue ID: MSV-6148.

NVD Source

Technical Analysis

CVE-2026-20449 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 6.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorAdjacent
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

mediatek136 products
mt6763 firmwaremt6763mt6765 firmwaremt6765mt6767 firmwaremt6767mt6768 firmwaremt6768mt6769 firmwaremt6769mt6771 firmwaremt6771+124 more
Source: NVD CPE · 136 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://corp.mediatek.com/product-security-bulletin/May-2026

All References (1)

→
https://corp.mediatek.com/product-security-bulletin/May-2026Vendor Advisory

Quick Facts

CVE IDCVE-2026-20449
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-120
CISA KEVNo
EPSS (30d)0.04%
Affected1 vendor
PublishedMay 4, 2026

Related CVEs (CWE-120)

CVE-2019-25741
9.8
CVE-2026-31027
9.8
CVE-2018-25237
9.8
CVE-2026-34875
9.8
CVE-2026-27459
9.8
CVE-2026-32746
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-20449 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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