CVE-2026-25262: Write-what-where Condition in Primary Bootloader

3

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.1% (30-day exploitation probability)+0
Technical severity (medium)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.14%

ahead of 3% of scored CVEs · Oct 14, 2026

Affects

Qualcomm

Mdm9207 Firmware and 8 more

CVSS base

6.3

Medium · 3 source(s)

Prioritization reference: 6.9 provisional

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

None

none · proof-of-concept · active

Automatable

No

can an attacker script the kill-chain steps

Technical impact

Total

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Qualcomm Mdm9207 Firmware, Qualcomm Mdm9645 Firmware, Qualcomm Mdm9655 Firmware…).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Exploitation requires user interaction: tighten email/web filtering and warn affected users.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Qualcomm	Mdm9207 Firmware	versions not specified by the source	Vulnerable	NIST National Vulnerability Database
Qualcomm	Mdm9645 Firmware	versions not specified by the source	Vulnerable	NIST National Vulnerability Database
Qualcomm	Mdm9655 Firmware	versions not specified by the source	Vulnerable	NIST National Vulnerability Database
Qualcomm	Mdm9665 Firmware	versions not specified by the source	Vulnerable	NIST National Vulnerability Database
Qualcomm	Msm8909 Firmware	versions not specified by the source	Vulnerable	NIST National Vulnerability Database
Qualcomm	Msm8916 Firmware	versions not specified by the source	Vulnerable	NIST National Vulnerability Database
Qualcomm	Msm8952 Firmware	versions not specified by the source	Vulnerable	NIST National Vulnerability Database
Qualcomm	Sdx50 Firmware	versions not specified by the source	Vulnerable	NIST National Vulnerability Database
Qualcomm	Snapdragon	version MDM9x07version MDM9x45version MDM9x55version MDM9x65version MSM8909version MSM8916version MSM8952version SDX50	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Physical

Attack complexity

High

Privileges required

None

User interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
6.9	CVSS 3.1	Medium	0.3	6.0	product-security@qualcomm.com via NIST National Vulnerability Database
6.9	CVSS 3.1	Medium	—	—	qualcomm via CVE Program (cve.org) e CISA ADP
6.3	CVSS 3.1	Medium	0.4	5.9	nvd@nist.gov via NIST National Vulnerability Database

CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H (score shown at the top: nvd@nist.gov)

Scoring entities (NIST, CNA, ADP) score independently; each score is shown with its origin. For prioritization we use 6.9 (product-security@qualcomm.com via NIST National Vulnerability Database) as a conservative provisional reference — not a definitive official score.

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-123

Other CVEs with this weakness →

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 0.14%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.

endpoint telemetry (EDR)

Timeline

What happened to this CVE, newest first.

2026
Affected products added · qualcomm, inc./snapdragon
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 13, 2026
CVSS changed · 6.3
Oct 13, 2026 · NIST National Vulnerability Database
Source status changed · → Analyzed
Oct 13, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 13, 2026 · NIST National Vulnerability Database
CVE published
Sep 22, 2026 · qualcomm

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

1 on the record

docs.qualcomm.com/product/publicresources/securitybulletin/may-2026-bulletin.html
Vendor Advisory, NIST National Vulnerability Database

Elsewhere on this site

Qualcomm
every CVE for this vendor

CWE-123
other pages naming this weakness

Related CVEs (same products)

High CVE-2026-57559 Use After Free in DSP_Services 9d
High CVE-2026-25302 Improper Verification of Cryptographic Signature in Boot 9d
High CVE-2026-57537 Use After Free in DSP Service 9d
High CVE-2026-57545 Untrusted Pointer Dereference in Graphics 9d
High CVE-2026-57546 Buffer Over-read in WLAN HAL 9d
High CVE-2026-57554 Use After Free in DSP Service 9d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No fixed version, patch or mitigation documented.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-25262 is "Write-what-where Condition in Primary Bootloader", rated Medium. It affects Mdm9207 Firmware (Qualcomm); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 6.3 describes technical severity. EPSS 0.14% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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