UnknownFinancial accountIdentity (basic)Government IDMediumActive

MERCURY SYSTEMS, INC.

bd_f2195c7a19f8994d · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

May 28, 2026

To disclose

—

Affected

3state residents only

Confidence

68%

Full breach record for MERCURY SYSTEMS, INC. →

Mercury Systems, Inc. issued a data incident notice in Massachusetts dated May 28, 2026. The incident may have impacted personal information of employees and dependents, including names, addresses, Social Security numbers, driver's license numbers, and financial account information. No evidence of fraudulent use was found. The company is offering 24 months of free identity monitoring and fraud protection via Experian.

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Incident timeline — partial

? — ?

Breach window unknown

May 28, 2026

Filed

—

No filing yet · watching

Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed3 affectedView incident

Name: MERCURY SYSTEMS, INC.
norm: mercury systems

Name: MERCURY SYSTEMS, INC.
norm: mercury systems

Discovered: —
Materiality determined: —
Notification sent: May 28, 2026
Affected individuals: 3state-resident count only
Data types: Financial accountIdentity (basic)Government ID
Data elements: Social Security number
Attack vector: Unknown

During the incident: Offering 24 months of free fraud detection and identity theft protection
Providing 24 months of free identity monitoring, fraud consultation, and identity theft restoration services through Experian’s IdentityWorks
Source: Quoted from the filing itself, not independently verified.

Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://www.mass.gov/doc/2026-861-mercury-systems-inc/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 28, 2026
Raw hash: 2648949678f8ee0b015835f4ed823e26063849ba57bfe3e7150f9b9ffdd1f4db

Reporting entityMERCURY SYSTEMS, INC.

Victim entityMERCURY SYSTEMS, INC.

IncidentUnknown

Stated responseOffering 24 months of free fraud detection and identity theft protection

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov