CVE-2021-26709
CVE-2021-26709 is a critical-severity vulnerability in D-link Dsl-320b-d1 with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 40% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-787.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 10.0
- EPSS exploit prediction: 40% (98th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-787
- Affected product: D-link Dsl-320b-d1
- Published:
- Last modified:
Description
D-Link DSL-320B-D1 devices through EU_1.25 are prone to multiple Stack-Based Buffer Overflows that allow unauthenticated remote attackers to take over a device via the login.xgi user and pass parameters. NOTE: This vulnerability only affects products that are no longer supported by the maintainer
Frequently asked questions
- What is CVE-2021-26709?
- D-Link DSL-320B-D1 devices through EU_1.25 are prone to multiple Stack-Based Buffer Overflows that allow unauthenticated remote attackers to take over a device via the login.xgi user and pass parameters. NOTE: This vulnerability only affects products that are no longer supported by the maintainer
- How severe is CVE-2021-26709?
- CVE-2021-26709 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-26709 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 40% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-26709?
- CVE-2021-26709 affects D-link Dsl-320b-d1. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-26709?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2021-26709 published?
- CVE-2021-26709 was published on 2021-04-07 and last updated on 2026-06-17.
References
- http://packetstormsecurity.com/files/162133/D-Link-DSL-320B-D1-Pre-Authentication-Buffer-Overflow.html
- http://seclists.org/fulldisclosure/2021/Apr/15
- https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10216
- https://www.dlink.com/en/security-bulletin
Affected products (1)
- cpe:2.3:o:d-link:dsl-320b-d1:*:*:*:*:*:*:*:*
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