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Attributed metadata history

REPORTPUBLIC METADATA

Exploitation of CitrixBleed 2 (CVE-2025-5777) Began Before PoC Was Public

GreyNoise has observed active exploitation attempts against CVE-2025-5777 (CitrixBleed 2), a memory overread vulnerability in Citrix NetScaler. Exploitation began on June 23 — nearly two weeks before a public proof-of-concept was released on July 4.

Reference details

Source category
Research & news
Report title
Exploitation of CitrixBleed 2 (CVE-2025-5777) Began Before PoC Was Public
First reported
Jul 16, 2025 00:00 UTC
Last reported
Jul 16, 2025 00:00 UTC
Catalog updated
Oct 08, 2026 03:52 UTC
Record ID
fd97f2e2c6f33d42757741fa7f7f300540e5a97e40df8c7d2c962d0bc451b77c

CVEs mentioned by sources

Published indicators

Network indicators are visibly defanged. This page does not make them clickable or send them to another service.

No validated file hashes or network indicators are stored for this record.

Source observations

src_0060ae82ad11b5dc16

Source-provided label
Not reported
Evidence class
mentioned in report
Confidence
Not reported
Observed
Jul 16, 2025 00:00 UTC
Retrieved
Oct 08, 2026 03:52 UTC

This record contains metadata and attribution only. It does not host, download, unpack, render, or execute malware samples.

Feed collection status

Sources represented on this page. Publication and observation dates describe the content; successful batch dates describe local collection. A recent batch does not certify complete coverage or current provider availability.

1 sources: 0 stale, 0 needing attention, 0 paused, 1 unverified.

Review source update dates and status
  • src_0060ae82ad11b5dc16Collection status unverifiedLast successful batch: Unverified

Stale means older than twice the recorded collection interval, with a minimum of one hour; without an interval, the threshold is 24 hours. Cached content remains available while a feed is stale, paused, or unverified.