Security readout for executives and security teams
Plain-English summary
This flaw allowed an unrelated user to make WhatsApp on Apple devices process content from an arbitrary URL through linked-device sync messages. WhatsApp assesses it may have been used with an Apple OS flaw against specific targeted users. Business urgency is high for executives or staff at elevated surveillance risk, despite medium CVSS.
Executive priority
Prioritize remediation immediately for high-risk personnel and managed Apple fleets. The vulnerability has medium CVSS severity, but KEV status and reported targeted exploitation raise business urgency, especially for organizations concerned about surveillance, executive compromise, or sensitive communications.
Technical view
CVE-2025-55177 is CWE-863 incomplete authorization in linked-device synchronization messages. Listed affected products are WhatsApp for iOS before v2.25.21.73, WhatsApp Business for iOS before v2.25.21.78, and WhatsApp for Mac before v2.25.21.78. The reported impact is limited confidentiality and integrity loss, with no availability impact stated.
Likely exposure
Exposure is primarily Apple users running older WhatsApp iOS, WhatsApp Business iOS, or WhatsApp for Mac versions. Risk concentrates around targeted users, but any unmanaged or slow-updating Apple endpoint using affected versions should be treated as exposed until verified.
Exploitation context
The bundle says CISA KEV lists this CVE and WhatsApp assesses it may have been exploited with Apple CVE-2025-43300 in sophisticated attacks against specific targeted users. No source here supports broad commodity exploitation or standalone exploitation details.
Researcher notes
Sources do not provide exploit mechanics, indicators, or a standalone proof of exploitation. The key technical issue is authorization failure in linked-device synchronization causing URL content processing on a target device. Treat analysis of CVE-2025-43300 as part of exposure review.
Mitigation direction
- Update WhatsApp for iOS to v2.25.21.73 or later.
- Update WhatsApp Business for iOS to v2.25.21.78 or later.
- Update WhatsApp for Mac to v2.25.21.78 or later.
- Apply relevant Apple platform updates per Apple guidance for CVE-2025-43300.
- Track WhatsApp, Meta, and CISA guidance for additional instructions.
Validation and detection
- Inventory managed Apple devices for installed WhatsApp product and version.
- Confirm affected versions are no longer present in MDM or endpoint telemetry.
- Prioritize validation for executives, journalists, legal, security, and high-risk staff.
- Check whether CISA KEV remediation deadlines apply to your organization.
- Review vendor advisories for any published detection or investigation guidance.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-863: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2025-55177 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.4 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:F/RL:O/RC:C
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:F/RL:O/RC:C2.82.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.4MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:F/RL:O/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- https://www.facebook.com/security/advisories/cve-2025-55177CVE reference · x_refsource_CONFIRM
- https://www.whatsapp.com/security/advisories/2025/CVE reference · x_refsource_CONFIRM
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-55177CVE reference · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Incorrect Authorization
Incorrect Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.