Security readout for executives and security teams
Plain-English summary
This CVE concerns an Etisalat-branded Sercomm S3-AC2100 router dashboard diagnostic feature with inadequate access control. A logged-in user on an adjacent network could potentially reach sensitive diagnostic functionality, creating confidentiality and integrity risk. The sources do not identify a vendor patch or confirmed active exploitation.
Executive priority
Treat this as a high-priority network-edge device issue if the model is in use. The business risk is concentrated in confidentiality and configuration integrity. Prioritize inventory, management-interface restriction, credential hygiene, and vendor/ISP guidance before assuming a patch exists.
Technical view
The record describes incorrect access control in the router dashboard diagnostic utility for Sercomm Router Etisalat Model S3-AC2100. CVSS 3.1 is 7.3 with adjacent-network access, low complexity, low privileges, no user interaction, high confidentiality and integrity impact, and no availability impact. CWE is listed as CWE-77, though the description emphasizes access control.
Likely exposure
Exposure is most likely where this router model is deployed and its management dashboard is reachable from local, Wi-Fi, or adjacent administrative networks. The structured affected-product fields are marked n/a, so exact firmware and version exposure is not established in the bundle.
Exploitation context
CISA KEV status is false, and the provided sources do not state active exploitation. The CVSS vector indicates exploitation requires adjacent-network position and low privileges, with no user interaction. Public proof detail may exist in the referenced GitHub page, but this analysis avoids offensive steps.
Researcher notes
Evidence is thin: the CVE record names the router model and dashboard diagnostic utility, but affected CPEs, versions, firmware ranges, and vendor remediation are not provided. The CWE-77 mapping suggests command-injection relevance, while the description frames the issue as access control.
Mitigation direction
- Check Sercomm, Etisalat, or ISP guidance for firmware updates or replacement advice.
- Restrict router dashboard access to trusted administrator networks only.
- Remove unnecessary low-privilege dashboard accounts and rotate administrative credentials.
- Disable or limit diagnostic functionality if supported by the router configuration.
- Segment guest Wi-Fi and untrusted LAN users away from router management interfaces.
Validation and detection
- Inventory deployed routers for Sercomm Etisalat S3-AC2100 identification.
- Record firmware versions and compare them with vendor or ISP advisories.
- Confirm the dashboard is unreachable from guest, user, and untrusted network segments.
- Review router accounts for least privilege and unauthorized users.
- Check logs or configuration history for unexpected diagnostic or administrative activity.
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-77: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. 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-2021-27702 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
- High
- CVSS
- 7.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
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 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:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N2.15.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.3HighVector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/Mrnmap/mrnmap-cve/blob/main/CVE-2021-27702CVE reference
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.