VulnSocial

CVE-2026-20401Disclosure(mediatek / mt2735)

LOWCVSS 7.5 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch mediatek mt2735 systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

In Modem, there is a possible system crash due to an uncaught exception. 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: MOLY01738310; Issue ID: MSV-5933.

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1.0/ 10 priority

Sources & remediation

Vendor / third-party advisories
Weakness type (CWE)
CWE-617CWE-754

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • mt2735
  • mt6833
  • mt6853
  • mt6855

Threat summary

  • Patch or workaround signal is available
  • 3 mentions across 3 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 3 signals
  • Disclosure: 2 classified signals
  • Peaked 2d ago at 1 mentions (2026-02-02); latest day: 1
  • 3 total mentions across 3 days

Affected systems

Vendors
mediatek
Products
mt2735mt6833mt6853mt6855mt6873mt6875mt6877mt6880mt6883mt6885

1 version affected across 20 products

Deep dive

Activity timeline3 mentions / 3d
00111Mentions · 2026-02-02: 1Mentions · 2026-02-07: 1Mentions · 2026-04-23: 1Patch / Workaround · 2026-04-23: 1Technical Details · 2026-02-02: 1Technical Details · 2026-02-07: 1Technical Details · 2026-04-23: 102-0202-0704-23
Signal classification2 categories
Disclosure
266.7%
Patch
133.3%
Referenced assets3 URLs
Classification over time
DateTotalLabels
2026-02-021
Disclosure1
2026-02-071
Disclosure1
2026-04-231
Patch1
Full discourse3 posts
  • CypherByte@cypherbyteio
    Patch

    Your smartphone just became a brick. 📱📵 A critical vulnerability (CVE-2026-20401) in MediaTek modems allows remote attackers to trigger an "Uncaught Exception," causing a total Denial of Service. With one malformed radio signal, your device loses all cellular connectivity. When the modem fails, the "smart" phone dies. Patch your firmware immediately to stay connected. 🛡️ Technical Deep Dive: https://www.cypherbyte.io/blog/cve-2026-20401-mediatek-modem-uncaught-exception-dos/ Follow @cypherbyteio 🛡️ #MediaTek #DoS #CyberSecurity #ZeroDay #Infosec

    Post summary

    CVE‑2026‑20401 is a remote‑triggered denial‑of‑service vulnerability in MediaTek modems that occurs when a malformed radio signal induces an uncaught exception; immediate firmware patching is recommended.

    1000060
    6 followersView on X
  • CRAC Learning - Tech@cracbot
    Disclosure

    CVE-2026-20401 (CVSS:7.5, HIGH) is Modified. In Modem, there is a possible system crash due to an uncaught exception. This could lead to remote denial of service, if..https://nvd.nist.gov/vuln/detail/CVE-2026-20401 #cybersecurityawareness #cybersecurity #CVE #infosec #hacker #nvd #mitre

    Post summary

    CVE-2026-20401 is a high‑severity vulnerability in modems that can trigger system crashes and remote denial of service.

    0000038
    171 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-20401 In Modem, there is a possible system crash due to an uncaught exception. This could lead to remote denial of service, if a UE has connected to a rogue base station co… https://www.cve.org/CVERecord?id=CVE-2026-20401

    Post summary

    CVE‑2026‑20401 describes a potential remote denial‑of‑service via an uncaught exception in a modem when a UE connects to a rogue base station.

    00000256
    56.5K followersView on X
CPE platform detail20 entries

20 of 20 entries

PartVendorProductVersionTarget SWTarget HW
HWmediatekmt2735---
HWmediatekmt6833---
HWmediatekmt6853---
HWmediatekmt6855---
HWmediatekmt6873---
HWmediatekmt6875---
HWmediatekmt6877---
HWmediatekmt6880---
HWmediatekmt6883---
HWmediatekmt6885---
HWmediatekmt6889---
HWmediatekmt6890---
HWmediatekmt6891---
HWmediatekmt6893---
HWmediatekmt8675---
HWmediatekmt8771---
HWmediatekmt8791---
HWmediatekmt8791t---
HWmediatekmt8797---
OSmediateknr15---

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