Security readout for executives and security teams
Plain-English summary
CVE-2021-34710 affects Cisco ATA 190 Series Analog Telephone Adapter Software. A logged-in network attacker could trigger command injection for remote code execution or cause denial of service. Business urgency is high where these voice adapters remain deployed, because compromise could affect device control, availability, and connected telephony operations.
Executive priority
Prioritize remediation for deployed ATA 190 Series devices that are reachable from broader internal or external networks. The issue can affect confidentiality, integrity, and availability, but supplied evidence does not confirm active exploitation. Ask infrastructure and telecom owners to validate exposure and Cisco guidance promptly.
Technical view
The CVE is rated CVSS 3.1 8.8 with AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Cisco describes multiple vulnerabilities that could enable command injection leading to remote code execution or denial of service on affected ATA 190 Series software. The source bundle maps CWE-770, but does not provide affected version ranges.
Likely exposure
Exposure is most likely in organizations still operating Cisco ATA 190 Series analog telephone adapters on reachable networks. The CVSS vector requires network access and low privileges, with no user interaction. The provided sources do not identify exact affected software versions or CPEs.
Exploitation context
The provided bundle does not show CISA KEV listing or active exploitation. Treat this as high-impact but not confirmed exploited from the supplied evidence. The attack requires low privileges, so account compromise or weak device access controls would materially raise risk.
Researcher notes
Key gaps in the supplied data are exact affected versions, fixed releases, and detailed vulnerable paths. Do not infer exploitability beyond the CVSS vector and Cisco summary. Focus validation on asset presence, software version mapping against Cisco’s advisory, privilege requirements, and network reachability.
Mitigation direction
- Review Cisco’s advisory for affected releases and fixed software guidance.
- Inventory Cisco ATA 190 Series devices and associated software versions.
- Restrict network access to device administration and service interfaces.
- Remove unnecessary accounts and enforce strong authentication for device access.
- Prioritize remediation where devices support critical voice services.
Validation and detection
- Confirm whether Cisco ATA 190 Series devices exist in asset inventories.
- Record installed ATA software versions for each discovered device.
- Check Cisco’s advisory for whether each version is affected.
- Verify network access controls limit untrusted access to the devices.
- Document whether compensating controls apply where upgrades are pending.
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-770: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-34710 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
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20211006 Cisco ATA 190 Series Analog Telephone Adapter Software VulnerabilitiesCVE reference · vendor-advisory, x_refsource_CISCO
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.
Allocation of Resources Without Limits or Throttling
Allocation of Resources Without Limits or Throttling represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.