# CVE-2026-77882: CVE-2026-77882

Status: published. Published: 2026-11-11. Updated: 2026-11-11.

A deserialization of untrusted data vulnerability was discovered in Lenovo System Update that could allow a local authenticated user to execute code with elevated privileges.

## Remediation

- fix: As of October 31, 2026, Lenovo System Update has reached end of support status, and no further updates will be released to address these vulnerabilities.  Lenovo recommends that users uninstall Lenovo System Update as soon as possible and migrate to Lenovo Commercial Vantage ( Lenovo Commercial Vantage - Lenovo Support US https://support.lenovo.com/us/en/solutions/hf003321 ). (source: CNA: lenovo)

## Affected products and versions

- Lenovo / System Update: ≥ 0; ≤ 5.08.03.59 (affected, custom). Source: CNA: lenovo

## Severity and prioritization

- CVSS 4.0: 8.5 (high); CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N; source: CNA: lenovo

- CVSS 3.1: 7.8 (high); CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H; source: CNA: lenovo

- CVSS 4.0: 8.5 (high); CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X; source: NVD: psirt@lenovo.com

- CVSS 3.1: 7.8 (high); CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H; source: NVD: psirt@lenovo.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-502

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://support.lenovo.com/us/en/product_security/LEN-232748 (CNA: lenovo; vendor-advisory)

- https://support.lenovo.com/us/en/downloads/ds012808 (CNA: lenovo; product)

- https://support.lenovo.com/us/en/downloads/ds012808 (psirt@lenovo.com)

- https://support.lenovo.com/us/en/product_security/LEN-232748 (psirt@lenovo.com)

## Provenance

- CNA: lenovo: https://www.cve.org/CVERecord?id=CVE-2026-77882; retrieved 2026-11-11; source updated 2026-11-11

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-77882; retrieved 2026-11-11; source updated 2026-11-11

Revision: 9c8cd42aa237b4d1bcd77d50193adfc0fddc99da62a601673554af7b7cf71b2b

Canonical: https://y2.dev/cve/CVE-2026-77882

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