Security readout for executives and security teams
Plain-English summary
Older Telegram clients could send messages in a way that made Telegram’s server receive them in a different order than the user sent them. The public record does not provide a CVSS score, business impact details, or evidence of active exploitation.
Executive priority
Treat this as a hygiene update unless Telegram is business-critical or used for sensitive communications. The public evidence is sparse and severity is unknown, but affected versions are old and should be removed from managed environments.
Technical view
CVE-2021-36769 is described as a reordering issue affecting Telegram before 7.8.1 for Android, before 7.8.3 for iOS, and Telegram Desktop before 2.8.8. The stated impact is server-side receipt of messages in an order different from client send order.
Likely exposure
Exposure appears limited to users or managed endpoints running the named older Telegram Android, iOS, or Desktop versions. The source bundle does not identify affected CPEs, server components, deployment conditions, or enterprise-specific exposure paths.
Exploitation context
The source bundle marks this CVE as not in KEV and provides no cited evidence of active exploitation. It also does not describe attacker prerequisites, exploit maturity, or observed abuse.
Researcher notes
The record lacks CVSS, CWE, CPEs, detailed attack conditions, and remediation notes beyond version thresholds implied by “before” wording. Focus validation on version exposure and monitor primary Telegram or CVE sources for richer technical details.
Mitigation direction
- Update Telegram Android to 7.8.1 or later.
- Update Telegram iOS to 7.8.3 or later.
- Update Telegram Desktop to 2.8.8 or later.
- Check Telegram or vendor guidance for any additional advisory details.
Validation and detection
- Inventory managed endpoints for installed Telegram client versions.
- Confirm Android clients are at least version 7.8.1.
- Confirm iOS clients are at least version 7.8.3.
- Confirm Desktop clients are at least version 2.8.8.
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.
CVE-2021-36769 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://mtpsym.github.io/CVE reference · x_refsource_MISC
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.