← gociux.comall exploited CVEs

Exploited vulnerability · CISA KEV

Is CVE-2025-55177 exploited? Yes: in CISA KEV since 2 Sep 2025

Gociux · Meta Platforms WhatsApp · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2025-55177, Meta Platforms WhatsApp Incorrect Authorization Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 2 Sep 2025, 4 days after it was published. It affects Meta Platforms WhatsApp. If you run it, CISA's required action is: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

exploitedYesCISA KEV · 2 Sep 2025
ransomwareNot knownno confirmed use
EPSStop 5%very likely to be exploited
severity5.4CVSS 3.1 · medium
US federal due23 Sep 2025BOD 22-01 deadline

What it is

Meta Platforms WhatsApp contains an incorrect authorization vulnerability due to an incomplete authorization of linked device synchronization messages. This vulnerability could allow an unrelated user to trigger processing of content from an arbitrary URL on a target’s device.

VendorMeta Platforms (3 exploited CVEs in KEV)
ProductWhatsApp
VulnerabilityMeta Platforms WhatsApp Incorrect Authorization Vulnerability
WeaknessCWE-863
Published29 Aug 2025
Added to KEV2 Sep 2025
Reported by (CNA)facebook

What to do

  1. Check whether you run it. Look for WhatsApp in your asset inventory, including appliances and cloud images. Stack check lists every exploited Meta Platforms CVE at once.
  2. Apply the fix. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 29 Aug 2025.
  4. Get told next time. Email alerts when CISA adds a CVE for Meta Platforms.

Other exploited CVEs in WhatsApp

References

Questions

Is CVE-2025-55177 being exploited?

Yes. CISA added CVE-2025-55177 to the Known Exploited Vulnerabilities catalog on 2 Sep 2025, which means there is reliable evidence of exploitation in the wild.

Is CVE-2025-55177 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2025-55177?

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Check Meta Platforms's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected WhatsApp and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in September 2025 · Meta Platforms scorecard · act-now radar.

Running Meta Platforms in a regulated environment?

We check exposure across your estate, patch or mitigate with your team, and set up detection for what attackers do after exploiting it.

Get in touch →