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CVE Record

CVE-2021-1510: Cisco SD-WAN vEdge Software Buffer Overflow Vulnerabilities

Multiple vulnerabilities in Cisco SD-WAN vEdge Software could allow an attacker to execute arbitrary code as the root user or cause a denial of service (DoS) condition on an affected device. For more information about these vulnerabilities, see the Details section of this advisory.

HighCVSS 7.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

This issue affects Cisco SD-WAN vEdge software and could let a logged-in network attacker crash an affected device or run code with root-level control. That makes it relevant to branch connectivity and SD-WAN availability, but the source bundle does not identify exact affected versions or fixed releases.

Executive priority

Prioritize this for environments dependent on Cisco vEdge routers for branch or WAN connectivity. Business urgency is high where device compromise or outage would disrupt operations, but evidence of active exploitation is not provided.

Technical view

CVE-2021-1510 covers multiple buffer overflow flaws in Cisco SD-WAN vEdge Software. The CVSS 3.1 score is 7.5 with network attack vector, high attack complexity, low privileges required, no user interaction, and high confidentiality, integrity, and availability impact.

Likely exposure

Exposure is limited to organizations running Cisco SD-WAN vEdge routers with vulnerable vEdge Software. The provided data lists versions as unavailable, so teams must validate against Cisco’s advisory and their device inventory.

Exploitation context

The bundle does not show CISA KEV listing or cited evidence of active exploitation. Exploitation requires low privileges and high complexity, but successful exploitation could produce root code execution or denial of service.

Researcher notes

The public bundle gives impact, CVSS, CWE-119, and vendor reference, but not affected version ranges or remediation details. Avoid over-scoping beyond Cisco SD-WAN vEdge Software until the Cisco advisory confirms product and release exposure.

Mitigation direction

  • Consult Cisco’s advisory for affected releases, fixed releases, and workarounds.
  • Inventory Cisco SD-WAN vEdge routers and prioritize confirmed affected devices.
  • Apply Cisco-recommended updates or mitigations through normal change control.
  • Track vendor guidance because the bundle does not name a specific patch.

Validation and detection

  • Confirm whether Cisco SD-WAN vEdge routers exist in the environment.
  • Map each device to its installed vEdge Software version.
  • Compare versions against Cisco’s advisory rather than relying on the bundle alone.
  • Review device health and security logs for crashes or unusual privileged activity.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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 · low confidence lookup

CWE-119: 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 lookup
description · low confidence lookup

Execution 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 lookup
cve · low confidence lookup

CVE-2021-1510 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Official CVE source material

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.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We 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.

ScoreVersionSeverityVectorExploitImpactSource
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H1.65.9Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

7.5High
CVSS 3.1 vector shape for CVE-2021-1510Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
CiscoCisco SD-WAN vEdge routern/aListed
Weakness

CWE details

CWE-119

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.