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CVE-2026-5211 Details
Description
A flaw has been found in D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW, DNS-321, DNR-322L, DNS-323, DNS-325, DNS-326, DNS-327L, DNR-326, DNS-340L, DNS-343, DNS-345, DNS-726-4, DNS-1100-4, DNS-1200-05 and DNS-1550-04 up to 20260205. This vulnerability affects the function UPnP_AV_Server_Path_Del of the file /cgi-bin/app_mgr.cgi. Executing a manipulation of the argument f_dir can lead to stack-based buffer overflow. The attack can be executed remotely. The exploit has been published and may be used.
A stack-based buffer overflow vulnerability has been identified in multiple D-Link NAS devices, including the DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW, DNS-321, DNR-322L, DNS-323, DNS-325, DNS-326, DNS-327L, DNR-326, DNS-340L, DNS-343, DNS-345, DNS-726-4, DNS-1100-4, DNS-1200-05, and DNS-1550-04, all running firmware versions prior to 20260205. The vulnerability arises in the UPnP_AV_Server_Path_Del function within the /cgi-bin/app_mgr.cgi file, where the f_dir parameter is not properly validated. This oversight allows remote attackers to manipulate the input, leading to a buffer overflow that can be exploited to execute arbitrary code.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 1, 2026Exploitation: PocAutomatable: NoTechnical Impact: Partial
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_165/165.md | [email protected] | ExploitThird Party Advisory |
| https://vuldb.com/submit/780434 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/vuln/354347 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/vuln/354347/cti | [email protected] | Permissions RequiredVDB Entry |
| https://www.dlink.com/ | [email protected] | Product |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-787 | Out-of-bounds Write | [email protected] |
| CWE-119 | Improper Restriction of Operations within the Bounds of a Memory Buffer | [email protected] |
| CWE-121 | Stack-based Buffer Overflow | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| dlink dnr-202l firmware | <= 2026-02-05 |
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| dlink dnr-202l | All versions |
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| dlink dnr-326 firmware | <= 2026-02-05 |
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| dlink dnr-326 | All versions |
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| dlink dns-1100-4 firmware | <= 2026-02-05 |
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| dlink dns-1100-4 | All versions |
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| dlink dns-120 firmware | <= 2026-02-05 |
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| dlink dns-120 | All versions |
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| dlink dns-1200-05 firmware | <= 2026-02-05 |
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| dlink dns-1200-05 | All versions |
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| dlink dns-1550-04 firmware | <= 2026-02-05 |
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| dlink dns-1550-04 | All versions |
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| dlink dns-315l firmware | <= 2026-02-05 |
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| dlink dns-315l | All versions |
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| dlink dns-320 firmware | <= 2026-02-05 |
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| dlink dns-320 | All versions |
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| dlink dns-320l firmware | <= 2026-02-05 |
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| dlink dns-320l | All versions |
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| dlink dns-320lw firmware | <= 2026-02-05 |
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| dlink dns-320lw | All versions |
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| dlink dns-321 firmware | <= 2026-02-05 |
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| dlink dns-321 | All versions |
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| dlink dns-322l firmware | <= 2026-02-05 |
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| dlink dns-322l | All versions |
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| dlink dns-323 firmware | <= 2026-02-05 |
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| dlink dns-323 | All versions |
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| dlink dns-325 firmware | <= 2026-02-05 |
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| dlink dns-325 | All versions |
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| dlink dns-326 firmware | <= 2026-02-05 |
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| dlink dns-326 | All versions |
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| dlink dns-327l firmware | <= 2026-02-05 |
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| dlink dns-327l | All versions |
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| dlink dns-340l firmware | <= 2026-02-05 |
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| dlink dns-340l | All versions |
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| dlink dns-343 firmware | <= 2026-02-05 |
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| dlink dns-343 | All versions |
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| dlink dns-345 firmware | <= 2026-02-05 |
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| dlink dns-345 | All versions |
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| dlink dns-726-4 firmware | <= 2026-02-05 |
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| dlink dns-726-4 | All versions |
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 24, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 2, 2026 | Initial Analysis | [email protected] |
| Mar 31, 2026 | New CVE Received | [email protected] |