In Modem, there is a possible out of bounds write due to an integer overflow.
Affects MediaTek chipsets in the Modem subcomponent, including MT2716, MT2735, MT2737 and MT6739. No vendor rating or fix is listed in the checked facts.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
- Exploited
- No known exploitation
- Fix
- No fix listed
- Who is exposed
- Not reported
Do first: Workaround: The checked facts do not list a workaround. No fix or mitigation is stated for this issue in the available sources.
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- Published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 24/100 · provisional
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Unclear
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: yes
- Technical impact: total
Summary
The software affected is the modem firmware on devices that use this component, which can be exploited when a device connects to a rogue base station. The impact is that an attacker could remotely gain elevated privileges on the affected device without any user interaction.
Read the original description
In Modem, there is a possible out of bounds write due to an integer overflow. This could lead to remote escalation of privilege, 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: MOLY01872867 / MOLY01774038; Issue ID: MSV-9801.
What to do
Workaround: The checked facts do not list a workaround. No fix or mitigation is stated for this issue in the available sources.
Timeline
- CISA SSVC assessment
Exploitation: none · Automatable: yes · Technical impact: total
- CVE published
- First seen by cve.now1 day
- Record last updated
Affected versions
- MediaTek, Inc. MediaTek chipset
MT2716, MT2735, MT2737, MT6739, MT6761, MT6762, MT6763, MT6765, MT6767, MT6768, MT6769, MT6771, MT6779, MT6781, MT6783, MT6785, MT6789, MT6813, MT6815, MT6833, MT6835, MT6853, MT6855, MT6858, MT6873, MT6875, MT6877, MT6878, MT6879, MT6880, and 47 more
Evidence 1
- Link
Corrections
None so far.
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Questions about CVE-2026-20548
What does this mean?
An integer overflow in the modem causes a write outside the memory it should touch. This out-of-bounds write can corrupt memory.Source: mediatek.com
Am I affected, and how do I check?
The checked facts name MediaTek chipsets in the Modem subcomponent, including MT2716, MT2735, MT2737 and MT6739, and also list MT6761. To check a device, look up its chipset model in the device specifications or the device vendor's documentation.Source: mediatek.com
What should I do about it?
The checked facts do not list a fixed version or upgrade target. Check MediaTek's security bulletins and the device vendor's firmware updates for a fix.Source: mediatek.com
Is it being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
What if there's no patch?
The checked facts do not list a workaround. No fix or mitigation is stated for this issue in the available sources.Source: mediatek.com