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Full vulnerability report · 2026
CVE-2025-10238High confidence

Lenovo X13 Gen 6 (Type 21RK, 21RL) Laptops (ThinkPad) BIOS: Out-of-bounds Write

Lenovo · X13 Gen 6 (Type 21RK, 21RL) Laptops (ThinkPad) BIOS

8.4HighCVSS 4.0
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityHighOperational priority:Medium, lowered one band.downgradedsince 11 Jun 2026

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • Exploitation requires an existing local or physical foothold with privileges.
  • EPSS is 0.12% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict local access and enforce least privilege on affected hosts.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs Lenovo X13 Gen 6 (Type 21RK, 21RL) Laptops (ThinkPad) BIOS and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: As exposure requiresRemediation target: Within 365 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2025-210108

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

During an internal security assessment, a potential out-of-bounds write vulnerability was discovered in the BIOS of some ThinkPad products could allow a privileged local user to execute code in System Management Mode (SMM).

What

During an internal security assessment, a potential out-of-bounds write vulnerability was discovered in the BIOS of some ThinkPad products could allow a privileged local user to execute code in System Management Mode (SMM).

Why

A bounds error lets data be written beyond the intended memory region, potentially corrupting control data.

How

An attacker operating through local access may attempt exploitation with elevated privileges. If successful, the issue may execute code or commands in the affected security context.

What

During an internal security assessment, a potential out-of-bounds write vulnerability was discovered in the BIOS of some ThinkPad products could allow a privileged local user to execute code in System Management Mode (SMM).

Why

A bounds error lets data be written beyond the intended memory region, potentially corrupting control data.

How

An attacker operating through local access may attempt exploitation with elevated privileges. If successful, the issue may execute code or commands in the affected security context.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
local access → Out-of-bounds Write → execute code or commands in the affected security context
Attack surface
Local
Privileges required
High: elevated access is required
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Not a CVSS 4.0 base metric
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-787 ↗

CWE-787: Out-of-bounds Write. The product writes data past the end, or before the beginning, of the intended buffer.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Common Vulnerability Scoring System 4.0: the compact vector below is decoded into plain language.

AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.ATNoneAttack requirements: No additional deployment or execution condition is required.PRHighPrivileges required: The attacker needs elevated or administrative privileges.UINoneUser interaction: No action by another user is required.VCHighVulnerable-system confidentiality: A successful attack can cause a major loss.VIHighVulnerable-system integrity: A successful attack can cause a major loss.VAHighVulnerable-system availability: A successful attack can cause a major loss.SCNoneSubsequent-system confidentiality: No direct loss is represented by this metric.SINoneSubsequent-system integrity: No direct loss is represented by this metric.SANoneSubsequent-system availability: No direct loss is represented by this metric.
Post-exploitation / living off the land
After compromise, an attacker may use built-in shells, scripting engines, scheduled tasks and native network utilities for discovery, persistence or movement. This is a plausible LoTL path, not evidence that it has occurred for every attack.
Remote code executionCWE-787
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
Fixed
Update to the version (or newer) as recommended in the advisory: https://support.lenovo.com/us/en/product_security/LEN-218282
Action
Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 10 Jun 2026 · Last source change 11 Jun 2026, 03:55 UTC · CWE-787 · Out-of-bounds Write

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2025-210108
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCNA
NVD statusNVD awaiting enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Vendor guidanceAuthoritative vendor guidance changed: added remediation: support.lenovo.com/LEN-218282.
    Before
    no authoritative guidance recorded
    After
    remediation: support.lenovo.com/LEN-218282
    CNA ↗
  2. Affected versionsThe structured affected or fixed version information changed.
    Before
    < 1.12; < 1.15; < BIOS: 1.13 / ECFW: 1.09; < 1.40; < 1.11; < UEFI BIOS V1.22/ECP V1.13; < 1.14 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    X13 Gen 6 (Type 21RK, 21RL) Laptops (ThinkPad) BIOS: < 1.12; X1 Carbon 13th Gen (Type 21NX, 21NY) Laptops (ThinkPad) BIOS: < 1.15; P16v Gen 3 (Type 21RS, 21RT) Laptop (ThinkPad) BIOS: < BIOS: 1.13 / ECFW: 1.09; L16 Gen 1 (Type 21L7 21L8) Laptops (ThinkPad) BIOS: < 1.40; T14s Gen 6 (Type 21TB, 21TC) Laptops (ThinkPad) BIOS: < 1.11; P14s Gen 6 (Type 21QT, 21QU) Laptops (ThinkPad) BIOS: < UEFI BIOS V1.22/ECP V1.13; L13 Gen 6 (Type 21RB, 21RC) Laptops (ThinkPad) BIOS: < 1.15; L14 Gen 6 (Type 21SE, 21SF) Laptops (ThinkPad) BIOS: < 1.14; E16 Gen 3 (Type 22AY, 22B0) Laptop (ThinkPad) BIOS: < 1.38; L16 Gen 2 (Type 21SC, 21SD) Laptops (ThinkPad) BIOS: < 1.13; X13 Gen 6 (Type 21RM, 21RN) Laptops (ThinkPad) BIOS: < 1.62/1.12; T14s Gen 6 (Type 21R1, 21R2) Laptops (ThinkPad) BIOS: < 1.10; X1 2-in-1 Gen 9 (Type 21KE, 21KF) Laptop (ThinkPad) BIOS: < 1.45; X1 Fold 16 Gen 1 (Type 21ES, 21ET) Laptop (ThinkPad) BIOS: < 1.25; Z16 Gen 2 (Type 21JX, 21JY) Laptop (ThinkPad) BIOS: < 1.37; P16v Gen 1 (Type 21FE, 21FF) Laptop (ThinkPad) BIOS: < 1.65/1.13; X13 Gen 4 (Type 21J3, 21J4) Laptop (ThinkPad) BIOS: < 1.37; T14s Gen 4 (Type 21F8, 21F9) Laptop (ThinkPad) BIOS: < 1.28; P14s Gen 4 (Type 21K5, 21K6) Laptop (ThinkPad) BIOS: < 1.47; P1 Gen 6 (Type 21FV, 21FW) Laptop (ThinkPad) BIOS: < 1.38; P16v Gen 1 (Type 21FC, 21FD) Laptop (ThinkPad) BIOS: < BIOS: 1.40 / ECFW: 1.09; P16 Gen 2 (Type 21FA, 21FB) Laptop (ThinkPad) BIOS: < BIOS: 1.61 / ECFW: 1.57; X13 Yoga Gen 4 (Type 21F2, 21F3) Laptop (ThinkPad) BIOS: < 1.22; P16s Gen 2 (Type 21HK, 21HL) Laptop (ThinkPad) BIOS: < 1.51; E14 Gen 5 (Type 21JR, 21JS) Laptop (ThinkPad) BIOS: < 1.29; T14s Gen 4 (Type 21F6, 21F7) Laptop (ThinkPad) BIOS: < 1.23; ThinkPad R14 Gen 5 Type 21JM PRC BIOS: < 1.41; L14 Gen 4 (Type 21H1, 21H2) Laptop (ThinkPad) BIOS: < 1.34; L13 Gen 4 (Type 21FG, 21FH) Laptop (ThinkPad) BIOS: < 1.24; X1 Nano Gen 3 (Type 21K1, 21K2) Laptop (ThinkPad) BIOS: < 1.28; S2 Yoga Gen 8 (Types 21FU) China Only Laptop (ThinkPad) BIOS: < 1.28; L15 Gen 4 (Type 21H7, 21H8) Laptops (ThinkPad) BIOS: < 1.27; X1 Yoga 8th Gen (Type 21HQ, 21HR) Laptop (ThinkPad) BIOS: < 1.37; T14s Gen 6 (Type 21M1, 21M2) Laptops (ThinkPad) BIOS: < 1.62/1.12; P15v Gen 3 (Type 21EN 21EM) Laptop (ThinkPad) BIOS: ≤ 1.28; P16 Gen 1 (Type 21D6, 21D7) Laptop (ThinkPad) BIOS: < 1.69; X1 2-in-1 Gen 10 (Type 21NU, 21NV) Laptop (ThinkPad) BIOS: < 1.39; X9-15 Gen 1 (Type 21Q6, 21Q7) Laptop (ThinkPad) BIOS: < 1.17; X9-14 Gen 1 (Type 21QA, 21QB) Laptop (ThinkPad) BIOS: < 1.21; T14s Gen 5 (Type 21LS, 21LT) Laptop (ThinkPad) BIOS: < 1.14; L14 Gen 5 (Type 21L1, 21L2) Laptops (ThinkPad) BIOS: < 1.24; E14 Gen 6 (Type 21M3, 21M4) Laptops (ThinkPad) BIOS: < 1.27; E16 Gen 3 (Type 21SR, 21SS) Laptops (ThinkPad) BIOS: < 1.11; T14 Gen 3 (Type 21AH, 21AJ) Laptop (ThinkPad) BIOS: < 1.45/1.25; T15p Gen 3 (Type 21DA 21DB) Laptop (ThinkPad) BIOS: < 1.67; P1 Gen 5 (Type 21DC 21DD) Laptop (ThinkPad) BIOS: < 1.29; T14s Gen 3 (Type 21CQ 21CR) Laptop (ThinkPad) BIOS: < 1.51; P14s Gen 3 (Type 21J5, 21J6) Laptop (ThinkPad) BIOS: < 1.63; Z16 Gen 1 (Type 21D4, 21D5) Laptop (ThinkPad) BIOS: < 1.76; T14s Gen 3 (Type 21BR 21BS) Laptop (ThinkPad) BIOS: < 1.48; L14 Gen 3 (type 21C1, 21C2) Laptops (ThinkPad) BIOS: < 1.44; X13 Yoga Gen 3 (Type 21AW 21AX) Laptop (ThinkPad) BIOS: < 1.25; L13 Yoga Gen 3 (Type 21B5, 21B6) Laptop (ThinkPad) BIOS: < 1.31; E14 Gen 4 (type 21E3, 21E4) Laptops (ThinkPad) BIOS: < 1.34; X1 Nano Gen 2 (Type 21E8 21E9) Laptop (ThinkPad) BIOS: < 1.32; E15 Gen 4 (type 21ED 21EE) Laptop (ThinkPad) BIOS: < 1.27; ThinkPad S2 Gen 7 Type 21BD BIOS: ≤ 1.36; X1 Yoga 7th Gen (Type 21CD, 21CE) Laptop (ThinkPad) BIOS: < 1.52; L14 Gen 3 (type 21C5, 21C6) Laptops (ThinkPad) BIOS: < 1.36; ThinkPad S2 Yoga Gen 6 Type 20VN China Only BIOS: < 1.38/1.36; X1 Yoga 6th Gen (Type 20XY, 20Y0) Laptop (ThinkPad) BIOS: < 1.75; E15 Gen 3 (Type 20YG, 20YH, 20YJ, 20YK) Laptop (ThinkPad) BIOS: < 1.24; X13 Yoga Gen 2 (Type 20W8, 20W9) Laptop (ThinkPad) BIOS: < 1.51; 45 additional product groups retained in the authoritative source · Fixed: Update to the version (or newer) as recommended in the advisory: https://support.lenovo.com/us/en/product_security/LEN-218282
    CNA ↗
  3. Remediation statusRemediation status changed from Awaiting fix to Patch available.
    Before
    Awaiting fix
    After
    Patch available
    CNA ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2025-210108↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2025-10238 · cve.blacktree.nl