Security readout for executives and security teams
Plain-English summary
CVE-2026-0791 affects ALGO 8180 IP Audio Alerter devices running version 5.5. A remote, unauthenticated attacker could potentially take control of the device by sending a specially crafted SIP INVITE message. This is high impact for environments using these alerting devices for paging, emergency notification, or operational communications.
Executive priority
Prioritize if ALGO 8180 devices support safety, emergency, or operational alerting, especially if reachable beyond trusted SIP infrastructure. Treat as high urgency for exposure reduction while awaiting or confirming vendor remediation.
Technical view
The flaw is a stack-based buffer overflow in handling the Replaces header of SIP INVITE requests. The device fails to validate user-supplied length before copying data into a fixed-length stack buffer. CVSS is 8.1, network reachable, unauthenticated, high complexity, with potential code execution in the device context.
Likely exposure
Exposure is most likely where ALGO 8180 devices running version 5.5 accept SIP traffic from untrusted networks, broad internal networks, or internet-facing VoIP infrastructure. Sources do not identify other affected versions.
Exploitation context
Authentication is not required, but CVSS marks attack complexity as high. The provided sources do not report active exploitation, and the CVE is not listed as KEV in the supplied bundle.
Researcher notes
This analysis is limited to the CVE record and ZDI advisory details in the source bundle. No exploit code, in-the-wild exploitation, patch version, or vendor workaround is provided in the supplied evidence.
Mitigation direction
- Check ALGO and ZDI guidance for fixed firmware or vendor-recommended mitigations.
- Restrict SIP access to trusted call servers and management networks only.
- Block internet exposure for affected ALGO 8180 devices.
- Segment paging and alerting devices from general user networks.
- Monitor for unusual SIP INVITE traffic targeting ALGO devices.
Validation and detection
- Inventory ALGO 8180 IP Audio Alerter devices.
- Confirm whether deployed devices run firmware version 5.5.
- Review firewall and ACL rules controlling SIP access to devices.
- Check whether any device is reachable from the internet.
- Review SIP logs for anomalous INVITE requests involving Replaces headers.
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
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CWE-121: Exact CWE lookup
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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-2026-0791 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 8.1 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:H/PR:N/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:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H2.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.1HighVector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- ZDI-26-013CVE reference · x_research-advisory
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.
Stack-based Buffer Overflow
Stack-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.