CVE-2022-37055
CVE-2022-37055 is a security flaw in D-Link Routers, routers for homes and small offices. Attackers can corrupt memory in D-Link Routers, which they use to take it over. The US Cybersecurity and Infrastructure Security Agency (CISA) added it to its catalog of flaws known to be used in attacks on 8 Dec 2025.[1]
D-Link Routers is in things households have: home and small-office routers, so the fix matters at home as much as at work. D-Link has published a fix or advice.
Description
CISA calls it a buffer overflow in D-Link Routers. In its words: “D-Link Routers contains a buffer overflow vulnerability that has a high impact on confidentiality, integrity, and availability. The impacted products could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization.”[1]
The underlying weakness is buffer overflow (CWE-120), in MITRE’s list of common software weaknesses.[2]
It scores 9.8 out of 10 on the Common Vulnerability Scoring System, which rates it critical, scored by NVD using CVSS 3.1.[2]
Affected versions
NVD’s record doesn’t list version ranges for it; D-Link’s advisory has them[3]. CISA names the product as D-Link Routers.
Every device with D-Link Routers needs the update.
Exploitation
CISA added it to its catalog of known exploited vulnerabilities on 8 Dec 2025, 1,198 days after it was made public. CISA lists a flaw only when it has reliable evidence of it being exploited, and gave US federal agencies until 29 Dec 2025 to fix it.[1]
FIRST’s Exploit Prediction Scoring System, which estimates how likely a flaw is to be used in attacks in the next 30 days from what it sees across the internet, puts it at 56%. That’s in the top 1% of the flaws it scores.[4]
CISA assesses it as automatable: attackers can run it against many targets at once.
CISA doesn’t say who was attacked, or how.
Fix
D-Link has published a fix or advice.[3] CISA’s required action: “Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.”[1]
- Update D-Link Routers now.Open the router’s app, or its admin page in a browser, and look for a firmware update. Then turn on automatic updates, so the next fix arrives on its own.
- If the maker has stopped updating it, replace it.Routers stop getting fixes after a few years, and attackers keep a list of the ones that did. If there’s no newer firmware, it won’t be fixed.
Timeline
| Date | Event |
|---|---|
| The flaw is made public in the National Vulnerability Database, with a severity score of 9.8.[2] | |
| CISA adds it to its catalog of flaws known to be used in attacks.[1] | |
| CISA’s deadline for US government agencies to fix it.[1] | |
| FIRST puts the odds of it being used in attacks in the next 30 days at 56%.[4] |
See also
Other D-Link flaws
- CVE-2025-29635, D-Link DIR-823X: command injection ·
- CVE-2022-40799, D-Link DNR-322L: download of code without integrity check ·
- CVE-2020-25079, D-Link DCS-2530L and DCS-2670L Devices: DCS-2530L and DCS-2670L command injection ·
- CVE-2020-25078, D-Link DCS-2530L and DCS-2670L Devices: unspecified ·
- CVE-2024-0769, D-Link DIR-859 Router: path traversal ·
Other buffer overflow flaws
- CVE-2025-43520, Apple devices: classic buffer overflow ·
- CVE-2025-20333, Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense: secure firewall adaptive security appliance (ASA) and secure firewall threat defense (FTD) buffer overflow ·
- CVE-2020-15069, Sophos XG Firewall: buffer overflow ·
- CVE-2023-41064, Apple iOS, iPadOS, and macOS: imageIO buffer overflow ·
- CVE-2023-33010, Zyxel Multiple Firewalls: buffer overflow ·
Added the same day
- CVE-2025-66644, Array Networks ArrayOS AG: OS command injection ·
Every D-Link flaw on CISA’s list · Everything added in December 2025
References
- ^ Cybersecurity and Infrastructure Security Agency. “D-Link Routers Buffer Overflow Vulnerability”. Known Exploited Vulnerabilities Catalog, added 8 Dec 2025.
- ^ National Institute of Standards and Technology. “CVE-2022-37055 Detail”. National Vulnerability Database, published 28 Aug 2022.
- ^ D-Link. Advisories and fixes: supportannouncement.us.dlink.com, dlink.com.
- ^ FIRST. “Exploit Prediction Scoring System”. EPSS 0.555, percentile 99.0, 31 Oct 2026.
- CVE Program. “CVE-2022-37055”. The official CVE record.
This article is built from CISA’s catalog (version 2026.10.30), NVD’s record and FIRST’s scores, kept in HARD’s database and checked every morning. The plain English is HARD’s.