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TI-2021-10085 Aliases CVE-2021-29296GHSA-4gp5-h62v-pf2f

Null Pointer Dereference vulnerability in D-Link DIR-825 2.10b02, which could let a…

Priority MEDIUM 41CWE-476Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-476.

Summary

Null Pointer Dereference vulnerability in D-Link DIR-825 2.10b02, which could let a remote malicious user cause a denial of service. The vulnerability could be triggered by sending an HTTP request with URL /vct_wan; the sbin/httpd would invoke the strchr function and take NULL as a first argument, which finally leads to the segmentation fault. NOTE: The DIR-825 and all hardware revisions is considered End of Life and as such this issue will not be patched

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01127 66th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:dlink:dir-825_firmware:2.10b02:*:*:*:*:*:*:*2.10b02VulnerableD-Link Japan K.K.
cpe:2.3:h:dlink:dir-825:-:*:*:*:*:*:*:*not specified by NVDRunning onD-Link Japan K.K.
  • cpe:2.3:o:dlink:dir-825_firmware:2.10b02:*:*:*:*:*:*:* Versions 2.10b02 Vulnerable ·D-Link Japan K.K.
  • cpe:2.3:h:dlink:dir-825:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·D-Link Japan K.K.

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-29296
  2. 2026-10-03 Alias added: GHSA-4gp5-h62v-pf2f

References

Advisory 2

  • TI-2019-12619 Unauthenticated remote code execution occurs in D-Link products such as DIR-655C… KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-06566 D-Link DIR-825 httpd switch_language.cgi sub_410DDC stack-based overflow CVSS 4.0CRITICAL 9.3
  • TI-2021-21236 In the "webupg" binary of D-Link DIR-825 G1, attackers can bypass authentication through… CVSS 3.1CRITICAL 9.8
  • TI-2026-06192 D-Link DIR-825 nmbd sserver.c NMBD_process buffer overflow CVSS 4.0HIGH 8.7
  • TI-2025-09764 D-Link DIR-825 apply.cgi sub_4106d4 buffer overflow CVSS 4.0HIGH 8.7
  • TI-2025-09210 D-Link DIR-825 httpd ping6_response.cg get_ping6_app_stat buffer overflow CVSS 4.0HIGH 8.7
See all 18 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences