CVE-2020-29557
Exploited in the wild. In CISA KEV since 2021‑11‑03. A vendor fix is available.
What to do
The vendor has published a fix. Version details are below where the sources state them.
- Dlink Dir-825 R1 FirmwareAffected: ≤ 3.0.1Upgrade to: after 3.0.1Stated by: NVD
- D-Link Corp. DIR-825 A D1Affected: до 3.0.1 включительноUpgrade to: not statedStated by: BDU
- D-Link Corp. DIR-825 AC EAffected: до 3.0.1 включительноUpgrade to: not statedStated by: BDU
- D-Link Corp. DIR-825 AC E1AAffected: до 3.0.1 включительноUpgrade to: not statedStated by: BDU
- D-Link Corp. DIR-825 ACF F1Affected: до 3.0.1 включительноUpgrade to: not statedStated by: BDU
Versions as the sources state them. 2 more products have version data. Full version matrix after sign-in
Coverage timeline
0 publishersAdded to CISA KEV catalog
Sourced from public security reporting — each date is when it was published, not when it happened.
What it is
From the CVE record
An issue was discovered on D-Link DIR-825 R1 devices through 3.0.1 before 2020-11-20. A buffer overflow in the web interface allows attackers to achieve pre-authentication remote code execution.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Listed as exploited in the wild since 2021-11-03.
US federal agencies must remediate by 2022-05-03.
Apply updates per vendor instructions.
- Public exploits
1 source with a proof of concept or module.
Exploit links, PoCs and Metasploit modules after sign-in- EPSS
54% chance of exploitation activity in the next 30 days, which ranks it in the 99th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
The patch came 119 days before any public exploit.
- OpenVAS check added
- EPSS band changecritical → high
- EPSS band changehigh → critical
- Public exploit / PoCsource: other
- Patch availablerecord updated
- Added to CISA KEV
Affected products
And 1 more affected product. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Scored 9.8 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
- Initial AccessT1190Exploit Public-Facing Applicationhigh confidence
- Privilege EscalationT1068Exploitation for Privilege Escalationhigh confidence
Sources
References in the record
And 3 more references. See all after sign-in
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We'll flag the next CVE, public exploit or patch for DIR-825 A D1, not every advisory. This one: actively exploited.
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