Known exploited vulnerability · CISA KEV

CVE-2015-3035: TP-Link Multiple Archer Devices Directory Traversal Vulnerability

Directory traversal vulnerability in multiple TP-Link Archer devices allows remote attackers to read arbitrary files via a .. (dot dot) in the PATH_INFO to login/.

CVE-2015-3035

Exploited in the wild. Fix this first.

CISA added it to the Known Exploited Vulnerabilities catalog on 2022-03-25: attackers are using it right now.

CISA KEV: Listed; Added 2022-03-25 · federal fix-by 2022-04-15
EPSS (30 days): 84%; Higher than 99.7% of CVEs · 2026-11-01
CVSS v3.1: 7.5 High; CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

What CISA says

TP-Link Multiple Archer Devices Directory Traversal Vulnerability

Apply updates per vendor instructions.

NVD description · published 2015-04-22

Directory traversal vulnerability in TP-LINK Archer C5 (1.2) with firmware before 150317, C7 (2.0) with firmware before 150304, and C8 (1.0) with firmware before 150316, Archer C9 (1.0), TL-WDR3500 (1.0), TL-WDR3600 (1.0), and TL-WDR4300 (1.0) with firmware before 150302, TL-WR740N (5.0) and TL-WR741ND (5.0) with firmware before 150312, and TL-WR841N (9.0), TL-WR841N (10.0), TL-WR841ND (9.0), and TL-WR841ND (10.0) with firmware before 150310 allows remote attackers to read arbitrary files via a .. (dot dot) in the PATH_INFO to login/.

Full record on NVD

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How to check if you are exposed to CVE-2015-3035

Find every TP-Link Multiple Archer Devices system you or your clients run, including ones exposed to the internet. Those come first: CISA only lists flaws attackers are already using.
Compare each version with the fixed versions in the vendor advisory. Where no fix exists yet, apply the vendor’s mitigation or take the system off the internet.
Run a credentialed vulnerability scan to catch the systems you missed, then check that the next scan no longer reports CVE-2015-3035.

US federal agencies had to fix this by 2022-04-15. Everyone else should treat that deadline as a guide: if it has passed, this is overdue.

Affected versions

Versions the National Vulnerability Database lists as vulnerable to CVE-2015-3035. Check the vendor advisory for the exact fixed builds before you sign anything off.

Product	Vulnerable versions
TP-Link Tl-Wr741nd Firmware	before 150312
TP-Link Tl-Wr841n Firmware	before 150310
TP-Link Tl-Wr740n Firmware	before 150312
TP-Link Archer C5 Firmware	before 150317
TP-Link Tl-Wdr3600 Firmware	before 150302
TP-Link Archer C7 Firmware	before 150304

NVD lists 5 more affected products; see the full record on NVD.

Timeline

2015-04-22 · Published in the National Vulnerability Database
2022-03-25 · Added to CISA's Known Exploited Vulnerabilities catalog, 2,529 days after it was published
2022-04-15 · Fix-by date for US federal agencies, passed 1,661 days ago

Weakness type

CWE-22

More exploited TP-Link vulnerabilities

CISA lists 6 exploited TP-Link vulnerabilities. The closest matches:

Keep going

Sources: CISA Known Exploited Vulnerabilities catalog (version 2026.10.30); EPSS data from FIRST.org; CVSS and descriptions from the NIST National Vulnerability Database. Checked 2026-11-01. This product uses the NVD API but is not endorsed or certified by the NVD.