Is CVE-2026-77882 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-77882 being exploited in the wild.

How severe is CVE-2026-77882?

High severity, with a CVSS score of 7.8, published 11 November 2026.

Is there a fix for CVE-2026-77882?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-77882 attacked?

It is attacked with local access, in a hosted service.

Am I affected by CVE-2026-77882?

Check whether you run Lenovo System Update. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-77882: Lenovo System Update deserialization of untrusted data

CVE-2026-77882 · Severity: high · CVSS 7.8 · Published 2026-11-11

Lenovo System Update, which delivers software updates to Lenovo devices, contains a flaw that allows a local user with system access to run malicious code with elevated privileges. An attacker with a user account on an affected system could exploit this to gain administrative control and compromise the entire device.

Vendors: Lenovo.

Quick answers

Is CVE-2026-77882 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-77882 being exploited in the wild.
How severe is CVE-2026-77882?: High severity, with a CVSS score of 7.8, published 11 November 2026.
Which products and versions are affected?: Lenovo System Update.
Is there a fix for CVE-2026-77882?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-77882 attacked?: It is attacked with local access, in a hosted service.
Am I affected by CVE-2026-77882?: Check whether you run Lenovo System Update. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A deserialization of untrusted data vulnerability (CWE-502) in Lenovo System Update allows local authenticated attackers to execute arbitrary code with elevated privileges. The vulnerability requires local access and prior authentication, but permits privilege escalation once exploited. A fix is available from the vendor.

Affected products

Lenovo System Update

Timeline

2026-11-11: disclosed: CVE-2026-77882 published

References

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